| International Comet Quarterly | Central Bureau for Astronomical Telegrams |
A comet was found by Discovered by Carl W. Hergenrother on CCD images obtained with a 0.41-m f/3 Schmidt telescope by Timothy B. Spahr on Nov. 22 in the course of the Catalina Sky Survey; the comet was described as having a moderately strong condensation with broad tail 30"-60" long in p.a. 80 deg. It was designated comet C/1998 W2 (Hergenrother) when announced by the Central Bureau for Astronomical Telegrams on IAUC 7057).
Additional observations showed that the comet is of short period, and it was recovered at its next return to perihelion by David Herald (at Kambah, near Canberra, Australian Capital Territory), on CCD images obtained with a 0.36-m f/3.9 Schmidt-Cassegrain reflector on 2005 July 4 and 5 (when it was designated comet P/2005 N2 on IAUC 8560, and then given the permanent number 168P; Herald found the comet at a position that was off from the 1998 prediction by +0.27 day in the time of perihelion). Herald noted that his stacking of fifteen 5-min frames showed a tail of length approximately 20" in p.a. 270 deg.
Orbital elements:
168P/Hergenrother Orbital elements by Gareth V. Williams
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5
T 2012 Oct. 1.97318 TT
q 1.4149639 (2000.0) P Q
n 0.14294461 Peri. 13.95627 +0.98241769 -0.18527368
a 3.6226318 Node 356.46874 +0.11420693 +0.69386012
e 0.6094100 Incl. 21.92973 +0.14768973 +0.69586766
P 6.90
From 398 observations 1998 Nov. 21-2012 Sept. 8, mean residual 0".9.
Nongravitational parameters A1 = +1.82, A2 = +0.2380.
168P/Hergenrother From orbital elements on MPEC 2012-R16
Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag.
2012 06 22 23 38.86 -29 33.0 1.223 1.797 106.4 32.9 18.5
2012 06 23 23 40.67 -29 22.8 1.209 1.791 106.8 32.9 18.4
2012 06 24 23 42.46 -29 12.5 1.196 1.784 107.2 33.0 18.4
2012 06 25 23 44.24 -29 02.0 1.183 1.778 107.7 33.0 18.4
2012 06 26 23 46.01 -28 51.4 1.170 1.772 108.1 33.0 18.3
2012 06 27 23 47.77 -28 40.7 1.157 1.766 108.5 33.1 18.3
2012 06 28 23 49.51 -28 29.9 1.144 1.760 109.0 33.1 18.2
2012 06 29 23 51.23 -28 18.9 1.131 1.754 109.4 33.1 18.2
2012 06 30 23 52.94 -28 07.7 1.118 1.748 109.9 33.2 18.2
2012 07 01 23 54.64 -27 56.4 1.105 1.742 110.3 33.2 18.1
2012 07 02 23 56.32 -27 45.0 1.092 1.736 110.7 33.2 18.1
2012 07 03 23 57.98 -27 33.4 1.080 1.730 111.2 33.2 18.0
2012 07 04 23 59.63 -27 21.6 1.067 1.724 111.6 33.2 18.0
2012 07 05 00 01.27 -27 09.7 1.055 1.718 112.1 33.3 18.0
2012 07 06 00 02.88 -26 57.5 1.042 1.712 112.5 33.3 17.9
2012 07 07 00 04.48 -26 45.2 1.030 1.706 113.0 33.3 17.9
2012 07 08 00 06.06 -26 32.7 1.018 1.701 113.4 33.3 17.8
2012 07 09 00 07.63 -26 20.1 1.006 1.695 113.9 33.3 17.8
2012 07 10 00 09.17 -26 07.2 0.993 1.689 114.3 33.3 17.8
2012 07 11 00 10.70 -25 54.1 0.981 1.683 114.8 33.2 17.7
2012 07 12 00 12.20 -25 40.8 0.970 1.678 115.3 33.2 17.7
2012 07 13 00 13.69 -25 27.3 0.958 1.672 115.7 33.2 17.6
2012 07 14 00 15.15 -25 13.6 0.946 1.667 116.2 33.2 17.6
2012 07 15 00 16.59 -24 59.6 0.934 1.661 116.7 33.1 17.6
2012 07 16 00 18.01 -24 45.4 0.923 1.656 117.2 33.1 17.5
2012 07 17 00 19.41 -24 31.0 0.911 1.650 117.6 33.1 17.5
2012 07 18 00 20.78 -24 16.3 0.900 1.645 118.1 33.0 17.4
2012 07 19 00 22.13 -24 01.3 0.888 1.639 118.6 33.0 17.4
2012 07 20 00 23.46 -23 46.1 0.877 1.634 119.1 32.9 17.3
2012 07 21 00 24.76 -23 30.5 0.866 1.629 119.6 32.8 17.3
2012 07 22 00 26.03 -23 14.7 0.855 1.623 120.1 32.8 17.3
2012 07 23 00 27.28 -22 58.6 0.844 1.618 120.6 32.7 17.2
2012 07 24 00 28.50 -22 42.1 0.833 1.613 121.2 32.6 17.2
2012 07 25 00 29.69 -22 25.3 0.822 1.608 121.7 32.5 17.1
2012 07 26 00 30.85 -22 08.1 0.812 1.603 122.2 32.4 17.1
2012 07 27 00 31.99 -21 50.6 0.801 1.598 122.8 32.3 17.1
2012 07 28 00 33.09 -21 32.7 0.791 1.593 123.3 32.2 17.0
2012 07 29 00 34.17 -21 14.4 0.780 1.588 123.9 32.1 17.0
2012 07 30 00 35.21 -20 55.8 0.770 1.583 124.4 31.9 16.9
2012 07 31 00 36.23 -20 36.7 0.760 1.578 125.0 31.8 16.9
2012 08 01 00 37.21 -20 17.2 0.750 1.574 125.5 31.7 16.8
2012 08 02 00 38.16 -19 57.2 0.740 1.569 126.1 31.5 16.8
2012 08 03 00 39.07 -19 36.8 0.730 1.564 126.7 31.3 16.8
2012 08 04 00 39.95 -19 16.0 0.720 1.560 127.3 31.2 16.7
2012 08 05 00 40.80 -18 54.6 0.710 1.555 127.9 31.0 16.7
2012 08 06 00 41.61 -18 32.7 0.701 1.551 128.5 30.8 16.6
2012 08 07 00 42.38 -18 10.4 0.691 1.546 129.2 30.6 16.6
2012 08 08 00 43.11 -17 47.5 0.682 1.542 129.8 30.3 16.5
2012 08 09 00 43.81 -17 24.0 0.673 1.538 130.4 30.1 16.5
2012 08 10 00 44.46 -17 00.0 0.663 1.533 131.1 29.9 16.5
2012 08 11 00 45.07 -16 35.4 0.654 1.529 131.8 29.6 16.4
2012 08 12 00 45.64 -16 10.2 0.645 1.525 132.4 29.4 16.4
2012 08 13 00 46.17 -15 44.4 0.637 1.521 133.1 29.1 16.3
2012 08 14 00 46.65 -15 17.9 0.628 1.517 133.8 28.8 16.3
2012 08 15 00 47.09 -14 50.8 0.619 1.513 134.5 28.5 16.3
2012 08 16 00 47.48 -14 23.0 0.611 1.509 135.3 28.2 16.2
2012 08 17 00 47.83 -13 54.5 0.603 1.506 136.0 27.8 16.2
2012 08 18 00 48.13 -13 25.2 0.595 1.502 136.8 27.5 16.1
2012 08 19 00 48.38 -12 55.3 0.587 1.498 137.5 27.1 16.1
2012 08 20 00 48.58 -12 24.6 0.579 1.495 138.3 26.8 16.1
2012 08 21 00 48.73 -11 53.1 0.571 1.491 139.1 26.4 16.0
2012 08 22 00 48.83 -11 20.9 0.564 1.488 139.9 26.0 16.0
2012 08 23 00 48.88 -10 47.8 0.556 1.484 140.7 25.5 15.9
2012 08 24 00 48.88 -10 13.9 0.549 1.481 141.6 25.1 15.9
2012 08 25 00 48.83 -09 39.2 0.542 1.478 142.4 24.7 15.9
2012 08 26 00 48.72 -09 03.6 0.535 1.475 143.3 24.2 15.8
2012 08 27 00 48.56 -08 27.2 0.528 1.471 144.2 23.7 15.8
2012 08 28 00 48.35 -07 49.9 0.522 1.468 145.1 23.2 15.8
2012 08 29 00 48.08 -07 11.8 0.515 1.466 146.0 22.7 15.7
2012 08 30 00 47.76 -06 32.8 0.509 1.463 146.9 22.2 15.7
2012 08 31 00 47.39 -05 52.9 0.503 1.460 147.8 21.6 15.7
2012 09 01 00 46.96 -05 12.1 0.497 1.457 148.7 21.1 15.6
2012 09 02 00 46.47 -04 30.5 0.492 1.455 149.7 20.5 15.6
2012 09 03 00 45.93 -03 48.1 0.486 1.452 150.6 19.9 15.6
2012 09 04 00 45.33 -03 04.7 0.481 1.450 151.6 19.3 15.5
2012 09 05 00 44.68 -02 20.6 0.476 1.447 152.6 18.7 15.5
2012 09 06 00 43.97 -01 35.6 0.471 1.445 153.6 18.1 15.5
2012 09 07 00 43.20 -00 49.9 0.466 1.443 154.5 17.5 15.4
2012 09 08 00 42.38 -00 03.3 0.462 1.440 155.5 16.9 15.4
2012 09 09 00 41.51 +00 43.9 0.458 1.438 156.5 16.2 15.4
2012 09 10 00 40.58 +01 31.9 0.454 1.436 157.4 15.6 15.4
2012 09 11 00 39.59 +02 20.5 0.450 1.435 158.4 15.0 15.3
2012 09 12 00 38.56 +03 09.7 0.446 1.433 159.3 14.3 15.3
2012 09 13 00 37.47 +03 59.5 0.443 1.431 160.3 13.7 15.3
2012 09 14 00 36.34 +04 49.8 0.440 1.429 161.1 13.1 15.3
2012 09 15 00 35.16 +05 40.5 0.437 1.428 162.0 12.6 15.3
2012 09 16 00 33.93 +06 31.6 0.435 1.426 162.8 12.0 15.2
2012 09 17 00 32.65 +07 23.1 0.432 1.425 163.5 11.5 15.2
2012 09 18 00 31.34 +08 14.8 0.430 1.424 164.2 11.1 15.2
2012 09 19 00 29.98 +09 06.8 0.428 1.423 164.8 10.6 15.2
2012 09 20 00 28.59 +09 58.8 0.427 1.421 165.3 10.3 15.2
2012 09 21 00 27.17 +10 50.8 0.426 1.420 165.7 10.0 15.2
2012 09 22 00 25.71 +11 42.9 0.425 1.419 166.0 9.8 15.2
2012 09 23 00 24.23 +12 34.8 0.424 1.419 166.2 9.7 15.2
2012 09 24 00 22.72 +13 26.5 0.423 1.418 166.2 9.7 15.1
2012 09 25 00 21.20 +14 17.9 0.423 1.417 166.2 9.7 15.1
2012 09 26 00 19.65 +15 09.0 0.423 1.417 166.0 9.9 15.1
2012 09 27 00 18.09 +15 59.7 0.423 1.416 165.6 10.1 15.1
2012 09 28 00 16.51 +16 49.8 0.424 1.416 165.2 10.4 15.1
2012 09 29 00 14.93 +17 39.4 0.424 1.415 164.6 10.8 15.1
2012 09 30 00 13.35 +18 28.3 0.425 1.415 164.0 11.2 15.2
2012 10 01 00 11.76 +19 16.6 0.427 1.415 163.3 11.7 15.2
2012 10 02 00 10.18 +20 04.0 0.428 1.415 162.6 12.2 15.2
2012 10 03 00 08.60 +20 50.7 0.430 1.415 161.8 12.8 15.2
2012 10 04 00 07.03 +21 36.4 0.432 1.415 160.9 13.3 15.2
2012 10 05 00 05.48 +22 21.2 0.434 1.415 160.1 13.9 15.2
2012 10 06 00 03.94 +23 05.1 0.436 1.416 159.2 14.5 15.2
2012 10 07 00 02.42 +23 48.0 0.439 1.416 158.2 15.2 15.2
2012 10 08 00 00.93 +24 29.8 0.441 1.417 157.3 15.8 15.2
2012 10 09 23 59.46 +25 10.5 0.444 1.417 156.4 16.4 15.3
2012 10 10 23 58.03 +25 50.2 0.448 1.418 155.4 17.0 15.3
2012 10 11 23 56.63 +26 28.8 0.451 1.419 154.5 17.6 15.3
2012 10 12 23 55.27 +27 06.3 0.455 1.419 153.5 18.3 15.3
2012 10 13 23 53.96 +27 42.6 0.458 1.420 152.6 18.9 15.3
2012 10 14 23 52.68 +28 17.9 0.462 1.421 151.7 19.4 15.4
2012 10 15 23 51.45 +28 52.0 0.466 1.423 150.8 20.0 15.4
2012 10 16 23 50.28 +29 25.1 0.471 1.424 149.8 20.6 15.4
2012 10 17 23 49.15 +29 57.0 0.475 1.425 148.9 21.1 15.4
2012 10 18 23 48.09 +30 27.8 0.480 1.426 148.1 21.7 15.4
2012 10 19 23 47.08 +30 57.6 0.485 1.428 147.2 22.2 15.5
2012 10 20 23 46.13 +31 26.4 0.490 1.429 146.3 22.7 15.5
2012 10 21 23 45.24 +31 54.1 0.495 1.431 145.5 23.2 15.5
2012 10 22 23 44.41 +32 20.9 0.500 1.433 144.7 23.7 15.6
2012 10 23 23 43.65 +32 46.6 0.506 1.435 143.8 24.2 15.6
2012 10 24 23 42.95 +33 11.4 0.511 1.437 143.0 24.6 15.6
2012 10 25 23 42.32 +33 35.3 0.517 1.439 142.3 25.0 15.6
2012 10 26 23 41.76 +33 58.3 0.523 1.441 141.5 25.4 15.7
2012 10 27 23 41.26 +34 20.5 0.529 1.443 140.7 25.8 15.7
2012 10 28 23 40.83 +34 41.7 0.535 1.445 140.0 26.2 15.7
2012 10 29 23 40.47 +35 02.2 0.541 1.447 139.3 26.6 15.8
2012 10 30 23 40.18 +35 21.9 0.548 1.450 138.6 27.0 15.8
2012 10 31 23 39.95 +35 40.8 0.554 1.452 137.9 27.3 15.8
2012 11 01 23 39.79 +35 59.0 0.561 1.455 137.2 27.6 15.9
2012 11 02 23 39.70 +36 16.5 0.567 1.457 136.5 27.9 15.9
2012 11 03 23 39.68 +36 33.3 0.574 1.460 135.9 28.2 15.9
2012 11 04 23 39.72 +36 49.5 0.581 1.463 135.2 28.5 16.0
2012 11 05 23 39.84 +37 05.0 0.588 1.466 134.6 28.8 16.0
2012 11 06 23 40.01 +37 19.9 0.595 1.469 134.0 29.0 16.0
2012 11 07 23 40.26 +37 34.3 0.603 1.472 133.4 29.3 16.1
2012 11 08 23 40.57 +37 48.1 0.610 1.475 132.8 29.5 16.1
2012 11 09 23 40.94 +38 01.3 0.617 1.478 132.2 29.8 16.1
2012 11 10 23 41.38 +38 14.1 0.625 1.481 131.7 30.0 16.2
2012 11 11 23 41.88 +38 26.3 0.632 1.484 131.1 30.2 16.2
2012 11 12 23 42.45 +38 38.1 0.640 1.488 130.6 30.4 16.3
2012 11 13 23 43.07 +38 49.5 0.648 1.491 130.0 30.5 16.3
2012 11 14 23 43.76 +39 00.4 0.656 1.495 129.5 30.7 16.3
2012 11 15 23 44.51 +39 10.9 0.664 1.498 129.0 30.9 16.4
2012 11 16 23 45.32 +39 21.0 0.672 1.502 128.5 31.0 16.4
2012 11 17 23 46.19 +39 30.8 0.680 1.506 128.0 31.2 16.4
2012 11 18 23 47.11 +39 40.2 0.688 1.510 127.5 31.3 16.5
2012 11 19 23 48.09 +39 49.3 0.697 1.513 127.0 31.4 16.5
2012 11 20 23 49.13 +39 58.1 0.705 1.517 126.5 31.6 16.6
2012 11 21 23 50.22 +40 06.5 0.713 1.521 126.0 31.7 16.6
2012 11 22 23 51.36 +40 14.7 0.722 1.525 125.6 31.8 16.6
2012 11 23 23 52.56 +40 22.6 0.731 1.530 125.1 31.9 16.7
2012 11 24 23 53.80 +40 30.3 0.739 1.534 124.7 32.0 16.7
2012 11 25 23 55.10 +40 37.7 0.748 1.538 124.2 32.0 16.7
2012 11 26 23 56.44 +40 44.8 0.757 1.542 123.8 32.1 16.8
2012 11 27 23 57.83 +40 51.7 0.766 1.547 123.4 32.2 16.8
2012 11 28 23 59.26 +40 58.4 0.775 1.551 122.9 32.3 16.9
2012 11 29 00 00.74 +41 04.9 0.784 1.555 122.5 32.3 16.9
2012 11 30 00 02.26 +41 11.2 0.794 1.560 122.1 32.4 16.9
2012 12 01 00 03.83 +41 17.3 0.803 1.565 121.7 32.4 17.0
2012 12 02 00 05.43 +41 23.1 0.812 1.569 121.2 32.5 17.0
2012 12 03 00 07.08 +41 28.8 0.822 1.574 120.8 32.5 17.0
2012 12 04 00 08.76 +41 34.4 0.831 1.579 120.4 32.6 17.1
2012 12 05 00 10.48 +41 39.7 0.841 1.583 120.0 32.6 17.1
2012 12 06 00 12.24 +41 44.9 0.851 1.588 119.6 32.6 17.2
2012 12 07 00 14.04 +41 50.0 0.861 1.593 119.2 32.7 17.2
2012 12 08 00 15.87 +41 54.9 0.870 1.598 118.8 32.7 17.2
2012 12 09 00 17.74 +41 59.6 0.880 1.603 118.4 32.7 17.3
2012 12 10 00 19.64 +42 04.2 0.890 1.608 118.0 32.7 17.3
2012 12 11 00 21.57 +42 08.7 0.901 1.613 117.6 32.7 17.3
2012 12 12 00 23.53 +42 13.0 0.911 1.619 117.2 32.7 17.4
2012 12 13 00 25.53 +42 17.2 0.921 1.624 116.8 32.8 17.4
2012 12 14 00 27.56 +42 21.3 0.931 1.629 116.4 32.8 17.5
2012 12 15 00 29.61 +42 25.3 0.942 1.634 116.1 32.8 17.5
2012 12 16 00 31.69 +42 29.2 0.953 1.640 115.7 32.8 17.5
2012 12 17 00 33.81 +42 32.9 0.963 1.645 115.3 32.7 17.6
2012 12 18 00 35.94 +42 36.6 0.974 1.650 114.9 32.7 17.6
2012 12 19 00 38.11 +42 40.2 0.985 1.656 114.5 32.7 17.7
2012 12 20 00 40.30 +42 43.7 0.996 1.661 114.1 32.7 17.7
2012 12 21 00 42.51 +42 47.0 1.007 1.667 113.7 32.7 17.7
2012 12 22 00 44.75 +42 50.3 1.018 1.672 113.4 32.7 17.8
2012 12 23 00 47.01 +42 53.5 1.029 1.678 113.0 32.7 17.8
2012 12 24 00 49.29 +42 56.7 1.040 1.684 112.6 32.6 17.8
2012 12 25 00 51.59 +42 59.7 1.051 1.689 112.2 32.6 17.9
2012 12 26 00 53.91 +43 02.6 1.063 1.695 111.8 32.6 17.9
2012 12 27 00 56.25 +43 05.5 1.074 1.701 111.4 32.6 18.0
2012 12 28 00 58.60 +43 08.3 1.086 1.707 111.0 32.5 18.0
2012 12 29 01 00.98 +43 11.0 1.097 1.712 110.6 32.5 18.0
2012 12 30 01 03.37 +43 13.6 1.109 1.718 110.3 32.5 18.1
2012 12 31 01 05.78 +43 16.1 1.121 1.724 109.9 32.4 18.1
2013 01 01 01 08.20 +43 18.6 1.133 1.730 109.5 32.4 18.2
2013 01 02 01 10.64 +43 21.0 1.145 1.736 109.1 32.4 18.2
2013 01 03 01 13.10 +43 23.3 1.157 1.742 108.7 32.3 18.2
2013 01 04 01 15.57 +43 25.5 1.169 1.748 108.3 32.3 18.3
2013 01 05 01 18.05 +43 27.7 1.182 1.754 107.9 32.2 18.3
2013 01 06 01 20.54 +43 29.7 1.194 1.760 107.5 32.2 18.3
2013 01 07 01 23.05 +43 31.8 1.206 1.766 107.1 32.2 18.4
2013 01 08 01 25.57 +43 33.7 1.219 1.772 106.7 32.1 18.4
2013 01 09 01 28.10 +43 35.6 1.232 1.779 106.3 32.1 18.5
2013 01 10 01 30.64 +43 37.4 1.244 1.785 105.9 32.0 18.5
2013 01 11 01 33.19 +43 39.1 1.257 1.791 105.5 32.0 18.5
2013 01 12 01 35.76 +43 40.7 1.270 1.797 105.1 31.9 18.6
2013 01 13 01 38.33 +43 42.3 1.283 1.803 104.7 31.8 18.6
2013 01 14 01 40.91 +43 43.9 1.296 1.810 104.3 31.8 18.6
2013 01 15 01 43.50 +43 45.3 1.309 1.816 103.9 31.7 18.7
2013 01 16 01 46.10 +43 46.7 1.322 1.822 103.4 31.7 18.7
2013 01 17 01 48.71 +43 48.1 1.336 1.829 103.0 31.6 18.7
2013 01 18 01 51.33 +43 49.3 1.349 1.835 102.6 31.5 18.8
2013 01 19 01 53.95 +43 50.6 1.362 1.841 102.2 31.5 18.8
2013 01 20 01 56.57 +43 51.7 1.376 1.848 101.8 31.4 18.9
2013 01 21 01 59.21 +43 52.8 1.390 1.854 101.4 31.4 18.9
2013 01 22 02 01.85 +43 53.8 1.403 1.861 100.9 31.3 18.9
2013 01 23 02 04.49 +43 54.8 1.417 1.867 100.5 31.2 19.0
2013 01 24 02 07.14 +43 55.7 1.431 1.874 100.1 31.1 19.0
2013 01 25 02 09.79 +43 56.5 1.445 1.880 99.7 31.1 19.0
2013 01 26 02 12.44 +43 57.2 1.459 1.887 99.2 31.0 19.1
2013 01 27 02 15.10 +43 57.9 1.473 1.893 98.8 30.9 19.1
2013 01 28 02 17.77 +43 58.6 1.487 1.900 98.4 30.9 19.1
2013 01 29 02 20.43 +43 59.1 1.502 1.906 98.0 30.8 19.2
2013 01 30 02 23.10 +43 59.6 1.516 1.913 97.5 30.7 19.2
2013 01 31 02 25.77 +44 00.1 1.530 1.920 97.1 30.6 19.3
2013 02 01 02 28.44 +44 00.4 1.545 1.926 96.7 30.5 19.3
2013 02 02 02 31.11 +44 00.7 1.559 1.933 96.2 30.5 19.3
2013 02 03 02 33.79 +44 01.0 1.574 1.940 95.8 30.4 19.4
2013 02 04 02 36.46 +44 01.1 1.589 1.946 95.3 30.3 19.4
2013 02 05 02 39.14 +44 01.2 1.604 1.953 94.9 30.2 19.4
2013 02 06 02 41.82 +44 01.3 1.619 1.960 94.4 30.1 19.5
2013 02 07 02 44.49 +44 01.2 1.634 1.966 94.0 30.0 19.5
2013 02 08 02 47.17 +44 01.1 1.649 1.973 93.6 29.9 19.5
2013 02 09 02 49.85 +44 01.0 1.664 1.980 93.1 29.8 19.6
2013 02 10 02 52.53 +44 00.7 1.679 1.986 92.7 29.8 19.6
2013 02 11 02 55.20 +44 00.5 1.694 1.993 92.2 29.7 19.6
2013 02 12 02 57.88 +44 00.1 1.709 2.000 91.8 29.6 19.7
2013 02 13 03 00.56 +43 59.7 1.725 2.007 91.3 29.5 19.7
2013 02 14 03 03.23 +43 59.2 1.740 2.013 90.8 29.4 19.7
2013 02 15 03 05.91 +43 58.6 1.756 2.020 90.4 29.3 19.8
2013 02 16 03 08.58 +43 58.0 1.771 2.027 89.9 29.2 19.8
2013 02 17 03 11.25 +43 57.4 1.787 2.034 89.5 29.1 19.8
2013 02 18 03 13.92 +43 56.6 1.802 2.041 89.0 29.0 19.9
2013 02 19 03 16.58 +43 55.8 1.818 2.048 88.6 28.9 19.9
2013 02 20 03 19.25 +43 54.9 1.834 2.054 88.1 28.8 19.9
2013 02 21 03 21.91 +43 54.0 1.850 2.061 87.6 28.6 20.0
2013 02 22 03 24.56 +43 53.0 1.866 2.068 87.2 28.5 20.0
2013 02 23 03 27.22 +43 51.9 1.882 2.075 86.7 28.4 20.0
2013 02 24 03 29.87 +43 50.8 1.898 2.082 86.2 28.3 20.1
2013 02 25 03 32.51 +43 49.6 1.914 2.089 85.8 28.2 20.1
2013 02 26 03 35.16 +43 48.3 1.930 2.096 85.3 28.1 20.1
2013 02 27 03 37.79 +43 47.0 1.946 2.102 84.8 28.0 20.2
2013 02 28 03 40.43 +43 45.6 1.962 2.109 84.4 27.9 20.2
2013 03 01 03 43.06 +43 44.1 1.978 2.116 83.9 27.7 20.2
2013 03 02 03 45.69 +43 42.6 1.995 2.123 83.4 27.6 20.3
2013 03 03 03 48.31 +43 41.0 2.011 2.130 82.9 27.5 20.3
2013 03 04 03 50.92 +43 39.3 2.027 2.137 82.5 27.4 20.3
2013 03 05 03 53.54 +43 37.5 2.044 2.144 82.0 27.3 20.4
2013 03 06 03 56.14 +43 35.7 2.060 2.151 81.5 27.1 20.4
2013 03 07 03 58.75 +43 33.9 2.077 2.158 81.0 27.0 20.4
2013 03 08 04 01.35 +43 31.9 2.093 2.165 80.5 26.9 20.5
2013 03 09 04 03.94 +43 29.9 2.110 2.171 80.1 26.8 20.5
2013 03 10 04 06.53 +43 27.8 2.127 2.178 79.6 26.6 20.5
2013 03 11 04 09.11 +43 25.7 2.143 2.185 79.1 26.5 20.6
2013 03 12 04 11.69 +43 23.5 2.160 2.192 78.6 26.4 20.6
2013 03 13 04 14.26 +43 21.2 2.177 2.199 78.1 26.3 20.6
2013 03 14 04 16.83 +43 18.9 2.193 2.206 77.7 26.1 20.6
2013 03 15 04 19.39 +43 16.5 2.210 2.213 77.2 26.0 20.7
2013 03 16 04 21.95 +43 14.0 2.227 2.220 76.7 25.9 20.7
2013 03 17 04 24.50 +43 11.5 2.244 2.227 76.2 25.7 20.7
2013 03 18 04 27.04 +43 08.9 2.261 2.234 75.7 25.6 20.8
2013 03 19 04 29.58 +43 06.2 2.278 2.241 75.2 25.4 20.8
2013 03 20 04 32.11 +43 03.5 2.294 2.248 74.7 25.3 20.8
2013 03 21 04 34.64 +43 00.7 2.311 2.255 74.2 25.2 20.9
2013 03 22 04 37.15 +42 57.8 2.328 2.262 73.7 25.0 20.9
2013 03 23 04 39.67 +42 54.9 2.345 2.269 73.3 24.9 20.9
2013 03 24 04 42.17 +42 51.9 2.362 2.276 72.8 24.7 20.9
2013 03 25 04 44.67 +42 48.9 2.379 2.283 72.3 24.6 21.0
2013 03 26 04 47.16 +42 45.8 2.396 2.289 71.8 24.4 21.0
2013 03 27 04 49.65 +42 42.6 2.413 2.296 71.3 24.3 21.0
2013 03 28 04 52.12 +42 39.4 2.430 2.303 70.8 24.2 21.1
2013 03 29 04 54.59 +42 36.1 2.447 2.310 70.3 24.0 21.1
2013 03 30 04 57.06 +42 32.7 2.464 2.317 69.8 23.9 21.1
2013 03 31 04 59.51 +42 29.3 2.481 2.324 69.3 23.7 21.1
2013 04 01 05 01.96 +42 25.8 2.498 2.331 68.8 23.6 21.2
2013 04 02 05 04.40 +42 22.2 2.515 2.338 68.3 23.4 21.2
2013 04 03 05 06.84 +42 18.6 2.532 2.345 67.8 23.3 21.2
2013 04 04 05 09.26 +42 14.9 2.549 2.352 67.3 23.1 21.2
2013 04 05 05 11.68 +42 11.2 2.566 2.359 66.8 22.9 21.3
2013 04 06 05 14.09 +42 07.3 2.583 2.366 66.3 22.8 21.3
2013 04 07 05 16.50 +42 03.5 2.600 2.373 65.8 22.6 21.3
2013 04 08 05 18.90 +41 59.6 2.617 2.380 65.3 22.5 21.4
2013 04 09 05 21.29 +41 55.6 2.634 2.387 64.8 22.3 21.4
2013 04 10 05 23.67 +41 51.5 2.651 2.394 64.3 22.2 21.4
2013 04 11 05 26.05 +41 47.4 2.668 2.400 63.8 22.0 21.4
2013 04 12 05 28.41 +41 43.3 2.685 2.407 63.3 21.8 21.5
2013 04 13 05 30.77 +41 39.0 2.702 2.414 62.8 21.7 21.5
2013 04 14 05 33.13 +41 34.7 2.719 2.421 62.3 21.5 21.5
2013 04 15 05 35.47 +41 30.4 2.736 2.428 61.8 21.4 21.5
2013 04 16 05 37.81 +41 26.0 2.753 2.435 61.3 21.2 21.6
2013 04 17 05 40.14 +41 21.6 2.769 2.442 60.8 21.0 21.6
2013 04 18 05 42.46 +41 17.1 2.786 2.449 60.3 20.9 21.6
2013 04 19 05 44.77 +41 12.5 2.803 2.456 59.8 20.7 21.6
2013 04 20 05 47.08 +41 07.9 2.820 2.463 59.3 20.5 21.7
2013 04 21 05 49.37 +41 03.2 2.836 2.470 58.8 20.4 21.7
2013 04 22 05 51.66 +40 58.5 2.853 2.476 58.3 20.2 21.7
2013 04 23 05 53.94 +40 53.7 2.870 2.483 57.7 20.0 21.7
2013 04 24 05 56.21 +40 48.9 2.886 2.490 57.2 19.9 21.8
2013 04 25 05 58.48 +40 44.0 2.903 2.497 56.7 19.7 21.8
2013 04 26 06 00.73 +40 39.0 2.920 2.504 56.2 19.5 21.8
2013 04 27 06 02.98 +40 34.0 2.936 2.511 55.7 19.3 21.8
2013 04 28 06 05.22 +40 29.0 2.953 2.518 55.2 19.2 21.9
2013 04 29 06 07.45 +40 23.9 2.969 2.525 54.7 19.0 21.9
2013 04 30 06 09.68 +40 18.7 2.985 2.531 54.2 18.8 21.9
2013 05 01 06 11.89 +40 13.5 3.002 2.538 53.7 18.7 21.9
2013 05 02 06 14.10 +40 08.3 3.018 2.545 53.2 18.5 22.0
2013 05 03 06 16.30 +40 03.0 3.034 2.552 52.7 18.3 22.0
2013 05 04 06 18.49 +39 57.6 3.051 2.559 52.1 18.1 22.0
2013 05 05 06 20.67 +39 52.2 3.067 2.566 51.6 18.0 22.0
2013 05 06 06 22.84 +39 46.7 3.083 2.572 51.1 17.8 22.0
2013 05 07 06 25.01 +39 41.2 3.099 2.579 50.6 17.6 22.1
2013 05 08 06 27.17 +39 35.7 3.115 2.586 50.1 17.4 22.1
2013 05 09 06 29.32 +39 30.1 3.131 2.593 49.6 17.2 22.1
2013 05 10 06 31.46 +39 24.5 3.147 2.600 49.1 17.1 22.1
2013 05 11 06 33.59 +39 18.8 3.163 2.607 48.6 16.9 22.2
2013 05 12 06 35.72 +39 13.0 3.178 2.613 48.0 16.7 22.2
2013 05 13 06 37.84 +39 07.3 3.194 2.620 47.5 16.5 22.2
2013 05 14 06 39.94 +39 01.5 3.210 2.627 47.0 16.3 22.2
2013 05 15 06 42.05 +38 55.6 3.225 2.634 46.5 16.2 22.2
2013 05 16 06 44.14 +38 49.7 3.241 2.640 46.0 16.0 22.3
2013 05 17 06 46.22 +38 43.7 3.256 2.647 45.5 15.8 22.3
2013 05 18 06 48.30 +38 37.8 3.272 2.654 45.0 15.6 22.3
2013 05 19 06 50.37 +38 31.7 3.287 2.661 44.5 15.4 22.3
2013 05 20 06 52.43 +38 25.7 3.302 2.667 43.9 15.3 22.4
2013 05 21 06 54.48 +38 19.6 3.317 2.674 43.4 15.1 22.4
2013 05 22 06 56.52 +38 13.4 3.332 2.681 42.9 14.9 22.4
2013 05 23 06 58.55 +38 07.2 3.347 2.688 42.4 14.7 22.4
2013 05 24 07 00.58 +38 01.0 3.362 2.694 41.9 14.5 22.4
2013 05 25 07 02.60 +37 54.7 3.377 2.701 41.4 14.3 22.5
2013 05 26 07 04.61 +37 48.5 3.392 2.708 40.9 14.2 22.5
2013 05 27 07 06.61 +37 42.1 3.406 2.715 40.3 14.0 22.5
2013 05 28 07 08.60 +37 35.8 3.421 2.721 39.8 13.8 22.5
2013 05 29 07 10.59 +37 29.3 3.435 2.728 39.3 13.6 22.5
2013 05 30 07 12.57 +37 22.9 3.450 2.735 38.8 13.4 22.6
2013 05 31 07 14.54 +37 16.4 3.464 2.741 38.3 13.2 22.6
2013 06 01 07 16.50 +37 09.9 3.478 2.748 37.8 13.1 22.6
2013 06 02 07 18.45 +37 03.4 3.492 2.755 37.3 12.9 22.6
2013 06 03 07 20.40 +36 56.8 3.506 2.761 36.8 12.7 22.6
2013 06 04 07 22.33 +36 50.2 3.520 2.768 36.2 12.5 22.7
2013 06 05 07 24.26 +36 43.6 3.534 2.775 35.7 12.3 22.7
2013 06 06 07 26.18 +36 36.9 3.548 2.781 35.2 12.1 22.7
2013 06 07 07 28.10 +36 30.2 3.562 2.788 34.7 12.0 22.7
2013 06 08 07 30.00 +36 23.5 3.575 2.794 34.2 11.8 22.7
2013 06 09 07 31.90 +36 16.7 3.589 2.801 33.7 11.6 22.7
2013 06 10 07 33.79 +36 09.9 3.602 2.808 33.2 11.4 22.8
2013 06 11 07 35.67 +36 03.1 3.615 2.814 32.7 11.2 22.8
2013 06 12 07 37.55 +35 56.3 3.628 2.821 32.2 11.0 22.8
2013 06 13 07 39.42 +35 49.4 3.641 2.827 31.6 10.9 22.8
2013 06 14 07 41.27 +35 42.5 3.654 2.834 31.1 10.7 22.8
2013 06 15 07 43.12 +35 35.6 3.667 2.841 30.6 10.5 22.9
2013 06 16 07 44.97 +35 28.7 3.680 2.847 30.1 10.3 22.9
2013 06 17 07 46.80 +35 21.7 3.692 2.854 29.6 10.1 22.9
2013 06 18 07 48.63 +35 14.7 3.705 2.860 29.1 10.0 22.9
2013 06 19 07 50.45 +35 07.7 3.717 2.867 28.6 9.8 22.9
2013 06 20 07 52.26 +35 00.7 3.729 2.873 28.1 9.6 22.9
H = 15.5, 2.5n = 10
Note: these magnitude parameters held for the previous two apparitions
in 1998-1999 and 2005; an outburst has occurred in 2012 that has made
the comet several magnitudes brighter (not reflected in the above
ephemeris because future forecast is uncertain)
Preliminary total-magnitude data on this comet are posted at the ICQ/CBAT comet-magnitudes observation webpage.
Astrometric observations of this comet from the Minor Planet Center archive are available here.
| Central Bureau for Astro. Tel. | Cometary Science Archive | International Comet Quarterly |
| Minor Planet Center | Origins/Harvard | EPS/Harvard |