Comet Archive

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251P/LINEAR

메타데이터

항목 값
Designation 251P/LINEAR
Type P
Perihelion (tp_cal, UTC) 2004-06-19T01:47:38.279040Z
Orbit solution date (soln_date, UTC) 2024-10-05T23:12:40Z
Obs used 431
NEO -
M1 12.000
K1 24.750
PC 0.030
Osculating 궤도요소
항목 값
Epoch (epoch_cal, TDB) 2007-04-11.0000000
e 0.50982311
q (au) 1.711672
a (au) 3.491948
i (deg) 23.507154
Ω (om, deg) 219.552911
ω (w, deg) 30.906733
M (ma, deg) 154.959455

밝기

251P/LINEAR · Magnitude (Full range)

산란 + 전체 선형

$$ M_a = (15.255 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목 값
H0 15.255
n 6.000
gf 1.000
gb -0.719
k 0.978
δ90 10.000
파라미터 기호 범위 설명
태양·지구거리 1 AU에서의 절대등급 H0 -5 to 20 혜성의 고유 밝기
광도 기울기 파라미터 n 2 to 6 태양거리 변화에 따른 밝기 변화율
전방 산란 비대칭 계수 gf 0.8 to 1 전방 산란의 강도
후방 산란 비대칭 계수 gb -1 to -0.5 후방 산란의 강도
분할 계수 k 0.8 to 1 전·후방 산란 기여도 비율
먼지/가스 밝기 비 δ90 1 to 10 코마에서 먼지 산란 대비 가스 방출의 상대 기여

참고: EPSC-DPS2025-160

천체력

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-02-03 00:00 01:47:19.84 +10:33:24.1 HIP 8306 17.45
2026-02-03 12:00 01:47:35.10 +10:33:58.1 HIP 8306 17.87
2026-02-04 00:00 01:47:50.49 +10:34:33.0 HIP 8306 19.05
2026-02-04 12:00 01:48:06.03 +10:35:08.9 HIP 8306 20.88
2026-02-05 00:00 01:48:21.71 +10:35:45.6 HIP 8416 23.12
2026-02-05 12:00 01:48:37.52 +10:36:23.2 HIP 8416 23.51
2026-02-06 00:00 01:48:53.46 +10:37:01.7 HIP 8416 24.55
2026-02-06 12:00 01:49:09.54 +10:37:41.0 HIP 8416 26.19
2026-02-07 00:00 01:49:25.75 +10:38:21.3 HIP 8416 28.33
2026-02-07 12:00 01:49:42.10 +10:39:02.3 HIP 8588 29.16
2026-02-08 00:00 01:49:58.58 +10:39:44.3 HIP 8588 26.37
2026-02-08 12:00 01:50:15.18 +10:40:27.0 HIP 8588 23.93
2026-02-09 00:00 01:50:31.92 +10:41:10.6 HIP 8588 21.99
2026-02-09 12:00 01:50:48.79 +10:41:55.0 HIP 8708 19.32
2026-02-10 00:00 01:51:05.78 +10:42:40.2 HIP 8708 15.16
2026-02-10 12:00 01:51:22.90 +10:43:26.2 HIP 8708 11.04
2026-02-11 00:00 01:51:40.15 +10:44:13.0 HIP 8708 7.06
2026-02-11 12:00 01:51:57.52 +10:45:00.6 HIP 8708 3.83
2026-02-12 00:00 01:52:15.01 +10:45:49.0 HIP 8708 4.16
2026-02-12 12:00 01:52:32.63 +10:46:38.1 HIP 8708 7.65
2026-02-13 00:00 01:52:50.37 +10:47:28.0 HIP 8708 11.80
2026-02-13 12:00 01:53:08.23 +10:48:18.6 HIP 8708 16.13
2026-02-14 00:00 01:53:26.21 +10:49:10.0 HIP 8859 14.53
2026-02-14 12:00 01:53:44.31 +10:50:02.0 HIP 8904 13.38
2026-02-15 00:00 01:54:02.52 +10:50:54.9 HIP 8904 8.89
2026-02-15 12:00 01:54:20.86 +10:51:48.4 HIP 8904 4.48
2026-02-16 00:00 01:54:39.31 +10:52:42.6 HIP 8904 1.85
2026-02-16 12:00 01:54:57.87 +10:53:37.5 HIP 8904 5.46
2026-02-17 00:00 01:55:16.55 +10:54:33.1 HIP 8904 10.00
2026-02-17 12:00 01:55:35.35 +10:55:29.4 HIP 8904 14.65
2026-02-18 00:00 01:55:54.25 +10:56:26.3 HIP 8904 19.37
2026-02-18 12:00 01:56:13.27 +10:57:23.9 HIP 8904 24.12
2026-02-19 00:00 01:56:32.40 +10:58:22.2 HIP 8904 28.90
2026-02-19 12:00 01:56:51.63 +10:59:21.1 HIP 9210 26.59
2026-02-20 00:00 01:57:10.98 +11:00:20.6 HIP 9210 22.96
2026-02-20 12:00 01:57:30.43 +11:01:20.7 HIP 9210 19.86
2026-02-21 00:00 01:57:49.98 +11:02:21.4 HIP 9210 17.57
2026-02-21 12:00 01:58:09.65 +11:03:22.7 HIP 9210 16.47
2026-02-22 00:00 01:58:29.41 +11:04:24.6 HIP 9210 16.83
2026-02-22 12:00 01:58:49.28 +11:05:27.1 HIP 9210 18.56
2026-02-23 00:00 01:59:09.25 +11:06:30.2 HIP 9210 21.37
2026-02-23 12:00 01:59:29.32 +11:07:33.8 HIP 9210 24.90
2026-02-24 00:00 01:59:49.49 +11:08:38.0 HIP 9210 28.91