메타데이터
| 항목 |
값 |
| Designation |
357P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-12-24T01:09:27.063360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:34Z |
| Obs used |
293 |
| NEO |
- |
| M1 |
5.100 |
| K1 |
29.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-12-05.0000000 |
| e |
0.43548563 |
| q (au) |
2.511840 |
| a (au) |
4.449560 |
| i (deg) |
6.325985 |
| Ω (om, deg) |
44.675030 |
| ω (w, deg) |
1.288453 |
| M (ma, deg) |
36.328214 |
밝기
산란 + 전체 선형
$$
M_a = (11.984 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.984 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.860 |
| k |
0.998 |
| 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) |
| 2026-03-26 00:00 |
20:36:27.70 |
-24:09:28.8 |
HIP 101624 |
15.65 |
| 2026-03-26 12:00 |
20:36:54.57 |
-24:08:26.7 |
HIP 101823 |
16.88 |
| 2026-03-27 00:00 |
20:37:21.34 |
-24:07:24.9 |
HIP 101823 |
11.76 |
| 2026-03-27 12:00 |
20:37:48.00 |
-24:06:23.5 |
HIP 101823 |
8.29 |
| 2026-03-28 00:00 |
20:38:14.55 |
-24:05:22.4 |
HIP 101823 |
8.64 |
| 2026-03-28 12:00 |
20:38:41.00 |
-24:04:21.7 |
HIP 101823 |
12.48 |
| 2026-03-29 00:00 |
20:39:07.33 |
-24:03:21.4 |
HIP 102018 |
17.48 |
| 2026-03-29 12:00 |
20:39:33.56 |
-24:02:21.4 |
HIP 102018 |
12.05 |
| 2026-03-30 00:00 |
20:39:59.68 |
-24:01:21.7 |
HIP 102018 |
7.66 |
| 2026-03-30 12:00 |
20:40:25.68 |
-24:00:22.5 |
HIP 102018 |
6.71 |
| 2026-03-31 00:00 |
20:40:51.58 |
-23:59:23.6 |
HIP 102018 |
10.17 |
| 2026-03-31 12:00 |
20:41:17.36 |
-23:58:25.2 |
HIP 102018 |
15.26 |
| 2026-04-01 00:00 |
20:41:43.03 |
-23:57:27.1 |
HIP 102018 |
20.79 |
| 2026-04-01 12:00 |
20:42:08.58 |
-23:56:29.4 |
HIP 102018 |
26.48 |
| 2026-04-02 00:00 |
20:42:34.02 |
-23:55:32.2 |
HIP 102298 |
31.15 |
| 2026-04-02 12:00 |
20:42:59.35 |
-23:54:35.3 |
HIP 102298 |
27.92 |
| 2026-04-03 00:00 |
20:43:24.55 |
-23:53:38.9 |
HIP 102298 |
25.66 |
| 2026-04-03 12:00 |
20:43:49.64 |
-23:52:43.0 |
HIP 102298 |
24.62 |
| 2026-04-04 00:00 |
20:44:14.61 |
-23:51:47.4 |
HIP 102298 |
24.92 |
| 2026-04-04 12:00 |
20:44:39.47 |
-23:50:52.3 |
HIP 102494 |
23.45 |
| 2026-04-05 00:00 |
20:45:04.20 |
-23:49:57.7 |
HIP 102494 |
17.82 |
| 2026-04-05 12:00 |
20:45:28.81 |
-23:49:03.5 |
HIP 102494 |
12.31 |
| 2026-04-06 00:00 |
20:45:53.30 |
-23:48:09.8 |
HIP 102494 |
7.14 |
| 2026-04-06 12:00 |
20:46:17.66 |
-23:47:16.6 |
HIP 102494 |
3.84 |
| 2026-04-07 00:00 |
20:46:41.90 |
-23:46:23.8 |
HIP 102494 |
6.48 |
| 2026-04-07 12:00 |
20:47:06.02 |
-23:45:31.6 |
HIP 102494 |
11.48 |
| 2026-04-08 00:00 |
20:47:30.00 |
-23:44:39.8 |
HIP 102636 |
16.75 |
| 2026-04-08 12:00 |
20:47:53.87 |
-23:43:48.5 |
HIP 102636 |
15.33 |
| 2026-04-09 00:00 |
20:48:17.60 |
-23:42:57.8 |
HIP 102636 |
15.83 |
| 2026-04-09 12:00 |
20:48:41.20 |
-23:42:07.6 |
HIP 102636 |
18.07 |
| 2026-04-10 00:00 |
20:49:04.68 |
-23:41:17.9 |
HIP 102837 |
14.78 |
| 2026-04-10 12:00 |
20:49:28.02 |
-23:40:28.7 |
HIP 102837 |
9.83 |
| 2026-04-11 00:00 |
20:49:51.23 |
-23:39:40.1 |
HIP 102837 |
5.81 |
| 2026-04-11 12:00 |
20:50:14.31 |
-23:38:52.1 |
HIP 102837 |
5.34 |
| 2026-04-12 00:00 |
20:50:37.25 |
-23:38:04.6 |
HIP 102837 |
8.95 |
| 2026-04-12 12:00 |
20:51:00.06 |
-23:37:17.7 |
HIP 102837 |
13.69 |
| 2026-04-13 00:00 |
20:51:22.73 |
-23:36:31.3 |
HIP 102837 |
18.69 |
| 2026-04-13 12:00 |
20:51:45.26 |
-23:35:45.5 |
HIP 103071 |
20.68 |
| 2026-04-14 00:00 |
20:52:07.65 |
-23:35:00.4 |
HIP 103071 |
17.12 |
| 2026-04-14 12:00 |
20:52:29.90 |
-23:34:15.8 |
HIP 103071 |
14.59 |
| 2026-04-15 00:00 |
20:52:52.01 |
-23:33:31.8 |
HIP 103071 |
13.61 |
| 2026-04-15 12:00 |
20:53:13.98 |
-23:32:48.5 |
HIP 103071 |
14.48 |
| 2026-04-16 00:00 |
20:53:35.81 |
-23:32:05.8 |
HIP 103071 |
16.88 |