芸西天文台通信＜2005年2月10日号＞で関さんが書かれたように「彗星年表2005」の予報光度
よりかなり暗いです。光度を修正しました。
Comet C/2004 S1 (Van Ness)
Epoch = 2005 July 9.0 TT
T = 2004 Dec. 9.1161 TT
Peri. = 93.2485
Node = 19.2058 2000.0
Incl. = 114.5296
q = 0.677978 AU
e = 0.993308
m1 = 16.5 + 5 log(Delta) + 10.0 log(r)
0h TT R.A.(2000) Decl. Delta r Daily motion m1 Elong.
2005/06 h m 。 ， m ， 。
Jan. 10 16 51.28 -08 58.8 1.458 0.934 -1.28 -27.7 17.0 39.2
Jan. 20 16 38.50 -13 35.8 1.382 1.071 -1.61 -30.9 17.5 50.5
Jan. 30 16 22.38 -18 44.6 1.283 1.216 -2.29 -34.8 17.9 63.2
Feb. 9 15 59.46 -24 32.8 1.176 1.362 -3.46 -38.1 18.2 77.5
Feb. 19 15 24.85 -30 54.2 1.080 1.509 -5.17 -36.5 18.5 93.6
Mar. 1 14 33.11 -36 59.0 1.016 1.654 -6.92 -23.6 18.7 111.0
Mar. 11 13 23.92 -40 54.9 1.010 1.798 -7.31 -1.1 19.1 127.7
Mar. 21 12 10.81 -41 06.2 1.074 1.939 -5.88 +16.8 19.5 139.0
Mar. 31 11 12.03 -38 17.8 1.207 2.078 -3.92 +23.0 20.1 140.6
Apr. 10 10 32.81 -34 28.1 1.394 2.214 -2.38 +21.4 20.7 134.4
Apr. 20 10 09.02 -30 53.7 1.620 2.348 -1.35 +17.4 21.3 125.2
Apr. 30 09 55.51 -27 59.9 1.871 2.480 -0.69 +13.2 21.8 115.7
May 10 09 48.65 -25 47.9 2.136 2.609 -0.25 +9.5 . 106.5
May 20 09 46.17 -24 12.7 2.409 2.737 +0.04 +6.5 . 97.8
May 30 09 46.61 -23 07.8 2.683 2.862 +0.25 +4.0 . 89.6
June 9 09 49.08 -22 27.7 2.955 2.986 +0.39 +1.9 . 81.9
June 19 09 52.96 -22 08.2 3.220 3.108 +0.49 +0.2 . 74.6
June 29 09 57.81 -22 05.9 3.476 3.228 +0.55 -1.2 . 67.6
July 9 10 03.35 -22 18.1 3.719 3.346 +0.60 -2.5 . 61.0
July 19 10 09.34 -22 42.9 3.949 3.463 +0.63 -3.6 . 54.7
July 29 10 15.60 -23 18.7 4.162 3.578 +0.64 -4.6 . 49.0
Aug. 8 10 21.99 -24 04.2 4.357 3.692 +0.64 -5.4 . 43.8
Aug. 18 10 28.39 -24 58.5 4.533 3.804 +0.63 -6.2 . 39.3
Aug. 28 10 34.69 -26 00.6 4.689 3.916 +0.61 -6.9 . 35.8
Sept. 7 10 40.77 -27 09.8 4.825 4.025 +0.58 -7.6 . 33.7
Sept.17 10 46.53 -28 25.5 4.938 4.134 +0.53 -8.2 . 33.2
Sept.27 10 51.85 -29 47.1 5.031 4.242 +0.48 -8.7 . 34.4
Oct. 7 10 56.61 -31 14.1 5.103 4.348 +0.41 -9.2 . 37.1
Oct. 17 11 00.67 -32 45.6 5.154 4.453 +0.32 -9.5 . 41.3
Oct. 27 11 03.88 -34 21.0 5.186 4.558 +0.22 -9.8 . 46.4
Nov. 6 11 06.06 -35 59.3 5.201 4.661 +0.10 -10.0 . 52.3
Nov. 16 11 07.04 -37 39.3 5.200 4.763 -0.04 -10.0 . 58.8
Nov. 26 11 06.60 -39 19.5 5.187 4.865 -0.21 -9.8 . 65.7
Dec. 6 11 04.55 -40 57.8 5.165 4.965 -0.39 -9.4 . 72.9
Dec. 16 11 00.68 -42 31.7 5.137 5.065 -0.58 -8.6 . 80.3
Dec. 26 10 54.87 -43 58.1 5.108 5.163 -0.78 -7.5 . 87.7
Jan. 5 10 47.06 -45 13.3 5.082 5.261 -0.97 -6.0 . 95.1
Jan. 15 10 37.34 -46 13.6 5.063 5.358 -1.13 -4.2 . 102.2
Jan. 25 10 25.99 -46 55.2 5.056 5.455 -1.25 -2.0 . 108.9
Feb. 4 10 13.48 -47 15.1 5.064 5.550 -1.30 +0.3 . 114.8
Feb. 14 10 00.47 -47 11.9 5.092 5.645 -1.28 +2.6 . 119.6
Feb. 24 09 47.68 -46 45.9 5.142 5.740 -1.19 +4.7 . 122.9
[2005年2月26日 0時30分42秒]