메타데이터
| 항목 |
값 |
| Designation |
C/1997 H2 (SOHO) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1997-05-03T04:04:48Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
115 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1997-05-03.1700000 |
| e |
1.00000000 |
| q (au) |
0.136100 |
| a (au) |
- |
| i (deg) |
18.320000 |
| Ω (om, deg) |
225.820000 |
| ω (w, deg) |
201.470000 |
| M (ma, deg) |
- |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-06-01 00:00 |
15:57:53.13 |
-15:24:59.0 |
HIP 78211 |
6.45 |
| 2026-06-01 12:00 |
15:57:50.91 |
-15:24:52.7 |
HIP 78211 |
6.96 |
| 2026-06-02 00:00 |
15:57:48.68 |
-15:24:46.4 |
HIP 78211 |
7.46 |
| 2026-06-02 12:00 |
15:57:46.47 |
-15:24:40.2 |
HIP 78211 |
7.98 |
| 2026-06-03 00:00 |
15:57:44.25 |
-15:24:34.0 |
HIP 78211 |
8.49 |
| 2026-06-03 12:00 |
15:57:42.04 |
-15:24:27.9 |
HIP 78211 |
9.01 |
| 2026-06-04 00:00 |
15:57:39.83 |
-15:24:21.8 |
HIP 78211 |
9.53 |
| 2026-06-04 12:00 |
15:57:37.62 |
-15:24:15.7 |
HIP 78115 |
9.50 |
| 2026-06-05 00:00 |
15:57:35.42 |
-15:24:09.7 |
HIP 78115 |
9.08 |
| 2026-06-05 12:00 |
15:57:33.23 |
-15:24:03.7 |
HIP 78115 |
8.68 |
| 2026-06-06 00:00 |
15:57:31.04 |
-15:23:57.7 |
HIP 78115 |
8.30 |
| 2026-06-06 12:00 |
15:57:28.85 |
-15:23:51.8 |
HIP 78115 |
7.93 |
| 2026-06-07 00:00 |
15:57:26.67 |
-15:23:45.9 |
HIP 78115 |
7.58 |
| 2026-06-07 12:00 |
15:57:24.49 |
-15:23:40.0 |
HIP 78115 |
7.26 |
| 2026-06-08 00:00 |
15:57:22.32 |
-15:23:34.2 |
HIP 78115 |
6.97 |
| 2026-06-08 12:00 |
15:57:20.16 |
-15:23:28.4 |
HIP 78115 |
6.70 |
| 2026-06-09 00:00 |
15:57:18.00 |
-15:23:22.7 |
HIP 78115 |
6.47 |
| 2026-06-09 12:00 |
15:57:15.84 |
-15:23:17.0 |
HIP 78115 |
6.27 |
| 2026-06-10 00:00 |
15:57:13.70 |
-15:23:11.3 |
HIP 78115 |
6.11 |
| 2026-06-10 12:00 |
15:57:11.55 |
-15:23:05.7 |
HIP 78115 |
6.00 |
| 2026-06-11 00:00 |
15:57:09.42 |
-15:23:00.1 |
HIP 78115 |
5.93 |
| 2026-06-11 12:00 |
15:57:07.29 |
-15:22:54.6 |
HIP 78115 |
5.90 |
| 2026-06-12 00:00 |
15:57:05.16 |
-15:22:49.1 |
HIP 78115 |
5.92 |
| 2026-06-12 12:00 |
15:57:03.05 |
-15:22:43.6 |
HIP 78115 |
5.98 |
| 2026-06-13 00:00 |
15:57:00.94 |
-15:22:38.2 |
HIP 78115 |
6.09 |
| 2026-06-13 12:00 |
15:56:58.83 |
-15:22:32.8 |
HIP 78115 |
6.24 |
| 2026-06-14 00:00 |
15:56:56.74 |
-15:22:27.5 |
HIP 78115 |
6.42 |
| 2026-06-14 12:00 |
15:56:54.65 |
-15:22:22.2 |
HIP 78115 |
6.64 |
| 2026-06-15 00:00 |
15:56:52.57 |
-15:22:17.0 |
HIP 78115 |
6.89 |
| 2026-06-15 12:00 |
15:56:50.50 |
-15:22:11.8 |
HIP 78115 |
7.16 |
| 2026-06-16 00:00 |
15:56:48.43 |
-15:22:06.7 |
HIP 78115 |
7.46 |
| 2026-06-16 12:00 |
15:56:46.37 |
-15:22:01.6 |
HIP 78115 |
7.77 |
| 2026-06-17 00:00 |
15:56:44.33 |
-15:21:56.5 |
HIP 78115 |
8.10 |
| 2026-06-17 12:00 |
15:56:42.29 |
-15:21:51.5 |
HIP 78115 |
8.45 |
| 2026-06-18 00:00 |
15:56:40.25 |
-15:21:46.6 |
HIP 78115 |
8.81 |
| 2026-06-18 12:00 |
15:56:38.23 |
-15:21:41.6 |
HIP 78115 |
9.18 |
| 2026-06-19 00:00 |
15:56:36.22 |
-15:21:36.8 |
HIP 78115 |
9.56 |
| 2026-06-19 12:00 |
15:56:34.21 |
-15:21:32.0 |
HIP 78115 |
9.95 |
| 2026-06-20 00:00 |
15:56:32.21 |
-15:21:27.2 |
HIP 78115 |
10.35 |
| 2026-06-20 12:00 |
15:56:30.23 |
-15:21:22.5 |
HIP 78115 |
10.75 |
| 2026-06-21 00:00 |
15:56:28.25 |
-15:21:17.8 |
HIP 78115 |
11.15 |
| 2026-06-21 12:00 |
15:56:26.28 |
-15:21:13.2 |
HIP 78115 |
11.56 |
| 2026-06-22 00:00 |
15:56:24.32 |
-15:21:08.6 |
HIP 78115 |
11.97 |