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C/1991 B1 (Shoemaker-Levy)

메타데이터

항목 값
Designation C/1991 B1 (Shoemaker-Levy)
Type C
Perihelion (tp_cal, UTC) 1991-12-31T04:34:48.403200Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:29:40Z
Obs used 429
NEO -
M1 6.500
K1 9.500
PC -
Osculating 궤도요소
항목 값
Epoch (epoch_cal, TDB) 1992-05-14.0000000
e 0.99357570
q (au) 2.265069
a (au) 352.578443
i (deg) 77.287941
Ω (om, deg) 145.130159
ω (w, deg) 74.368785
M (ma, deg) 0.020070

밝기

C/1991 B1 (Shoemaker-Levy) · Magnitude (Full range)

산란 + 전체 선형

$$ M_a = (3.416 + 5.065\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목 값
H0 3.416
n 5.065
gf 1.000
gb -0.500
k 1.000
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

잔차 (구간 선형)

$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$

시작일 (UTC) 끝 (UTC) a b
1991-01-13 1991-03-15 +11.0750 -6.905
1991-03-15 1991-12-31 -2.4398 +1.131
1992-01-01 1992-06-26 +4.2282 -1.567
1992-06-26 1993-10-08 -3.6144 +1.867

log10 r = log10(태양거리/AU), Δ = 지구거리(AU)

천체력

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-02-03 00:00 00:38:01.85 -51:46:28.0 HIP 3154 19.35
2026-02-03 12:00 00:38:03.70 -51:46:02.8 HIP 3154 19.03
2026-02-04 00:00 00:38:05.56 -51:45:37.6 HIP 3154 18.72
2026-02-04 12:00 00:38:07.45 -51:45:12.6 HIP 3154 18.41
2026-02-05 00:00 00:38:09.36 -51:44:47.6 HIP 3154 18.11
2026-02-05 12:00 00:38:11.30 -51:44:22.7 HIP 3154 17.82
2026-02-06 00:00 00:38:13.25 -51:43:57.8 HIP 3154 17.53
2026-02-06 12:00 00:38:15.23 -51:43:33.1 HIP 3154 17.24
2026-02-07 00:00 00:38:17.22 -51:43:08.5 HIP 3154 16.97
2026-02-07 12:00 00:38:19.24 -51:42:43.9 HIP 3154 16.70
2026-02-08 00:00 00:38:21.28 -51:42:19.5 HIP 3154 16.44
2026-02-08 12:00 00:38:23.34 -51:41:55.1 HIP 3154 16.19
2026-02-09 00:00 00:38:25.42 -51:41:30.8 HIP 3154 15.95
2026-02-09 12:00 00:38:27.52 -51:41:06.7 HIP 3154 15.72
2026-02-10 00:00 00:38:29.64 -51:40:42.6 HIP 3154 15.50
2026-02-10 12:00 00:38:31.78 -51:40:18.6 HIP 3154 15.29
2026-02-11 00:00 00:38:33.94 -51:39:54.8 HIP 3154 15.10
2026-02-11 12:00 00:38:36.12 -51:39:31.0 HIP 3154 14.91
2026-02-12 00:00 00:38:38.32 -51:39:07.3 HIP 3154 14.74
2026-02-12 12:00 00:38:40.54 -51:38:43.8 HIP 3154 14.57
2026-02-13 00:00 00:38:42.78 -51:38:20.4 HIP 3154 14.43
2026-02-13 12:00 00:38:45.04 -51:37:57.1 HIP 3154 14.29
2026-02-14 00:00 00:38:47.32 -51:37:33.8 HIP 3154 14.18
2026-02-14 12:00 00:38:49.61 -51:37:10.8 HIP 3154 14.07
2026-02-15 00:00 00:38:51.93 -51:36:47.8 HIP 3154 13.98
2026-02-15 12:00 00:38:54.26 -51:36:24.9 HIP 3154 13.91
2026-02-16 00:00 00:38:56.61 -51:36:02.2 HIP 3154 13.85
2026-02-16 12:00 00:38:58.98 -51:35:39.6 HIP 3154 13.81
2026-02-17 00:00 00:39:01.37 -51:35:17.1 HIP 3154 13.79
2026-02-17 12:00 00:39:03.77 -51:34:54.8 HIP 3154 13.78
2026-02-18 00:00 00:39:06.19 -51:34:32.5 HIP 3154 13.79
2026-02-18 12:00 00:39:08.63 -51:34:10.4 HIP 3154 13.81
2026-02-19 00:00 00:39:11.09 -51:33:48.5 HIP 3154 13.86
2026-02-19 12:00 00:39:13.56 -51:33:26.6 HIP 3154 13.91
2026-02-20 00:00 00:39:16.05 -51:33:04.9 HIP 3154 13.99
2026-02-20 12:00 00:39:18.56 -51:32:43.4 HIP 3154 14.08
2026-02-21 00:00 00:39:21.08 -51:32:22.0 HIP 3154 14.19
2026-02-21 12:00 00:39:23.62 -51:32:00.7 HIP 3154 14.31
2026-02-22 00:00 00:39:26.18 -51:31:39.5 HIP 3154 14.45
2026-02-22 12:00 00:39:28.75 -51:31:18.5 HIP 3154 14.60
2026-02-23 00:00 00:39:31.33 -51:30:57.7 HIP 3154 14.77
2026-02-23 12:00 00:39:33.93 -51:30:37.0 HIP 3213 14.52
2026-02-24 00:00 00:39:36.55 -51:30:16.4 HIP 3213 13.99