메타데이터
| 항목 |
값 |
| Designation |
385P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-11-09T10:11:43.048320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:41Z |
| Obs used |
353 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
25.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-08-02T01:14:10.464000Z |
| Discovery magnitude (MPC) |
20.40 T |
| Discovery observatory (MPC) |
461 · University of Szeged, Piszkéstető Stn. (Konkoly) |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-11-22.0000000 |
| e |
0.40226883 |
| q (au) |
2.555233 |
| a (au) |
4.274887 |
| i (deg) |
16.855651 |
| Ω (om, deg) |
357.157345 |
| ω (w, deg) |
44.328792 |
| M (ma, deg) |
82.916702 |
밝기
산란 + 전체 선형
$$
M_a = (18.057 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.057 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.644 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
17:49:01.76 |
-43:36:07.9 |
HIP 87253 |
7.58 |
| 2026-07-29 12:00 |
17:48:45.39 |
-43:34:33.9 |
HIP 87253 |
10.43 |
| 2026-07-30 00:00 |
17:48:29.28 |
-43:32:58.9 |
HIP 87125 |
8.12 |
| 2026-07-30 12:00 |
17:48:13.42 |
-43:31:23.0 |
HIP 87125 |
5.24 |
| 2026-07-31 00:00 |
17:47:57.83 |
-43:29:46.1 |
HIP 87125 |
3.24 |
| 2026-07-31 12:00 |
17:47:42.49 |
-43:28:08.4 |
HIP 87066 |
3.75 |
| 2026-08-01 00:00 |
17:47:27.41 |
-43:26:29.8 |
HIP 87066 |
1.55 |
| 2026-08-01 12:00 |
17:47:12.59 |
-43:24:50.3 |
HIP 87066 |
3.30 |
| 2026-08-02 00:00 |
17:46:58.04 |
-43:23:10.0 |
HIP 87066 |
6.23 |
| 2026-08-02 12:00 |
17:46:43.76 |
-43:21:28.9 |
HIP 87029 |
8.29 |
| 2026-08-03 00:00 |
17:46:29.74 |
-43:19:46.9 |
HIP 87029 |
10.84 |
| 2026-08-03 12:00 |
17:46:16.00 |
-43:18:04.2 |
HIP 87029 |
13.58 |
| 2026-08-04 00:00 |
17:46:02.52 |
-43:16:20.6 |
HIP 87029 |
16.41 |
| 2026-08-04 12:00 |
17:45:49.32 |
-43:14:36.4 |
HIP 87029 |
19.27 |
| 2026-08-05 00:00 |
17:45:36.40 |
-43:12:51.4 |
HIP 87046 |
20.71 |
| 2026-08-05 12:00 |
17:45:23.75 |
-43:11:05.7 |
HIP 87046 |
21.73 |
| 2026-08-06 00:00 |
17:45:11.38 |
-43:09:19.3 |
HIP 87046 |
23.02 |
| 2026-08-06 12:00 |
17:44:59.29 |
-43:07:32.2 |
HIP 86847 |
23.99 |
| 2026-08-07 00:00 |
17:44:47.48 |
-43:05:44.4 |
HIP 86847 |
22.01 |
| 2026-08-07 12:00 |
17:44:35.96 |
-43:03:56.1 |
HIP 86847 |
20.21 |
| 2026-08-08 00:00 |
17:44:24.71 |
-43:02:07.1 |
HIP 86847 |
18.63 |
| 2026-08-08 12:00 |
17:44:13.76 |
-43:00:17.4 |
HIP 86847 |
17.32 |
| 2026-08-09 00:00 |
17:44:03.08 |
-42:58:27.3 |
HIP 86847 |
16.34 |
| 2026-08-09 12:00 |
17:43:52.70 |
-42:56:36.5 |
HIP 86847 |
15.71 |
| 2026-08-10 00:00 |
17:43:42.61 |
-42:54:45.2 |
HIP 86847 |
15.48 |
| 2026-08-10 12:00 |
17:43:32.81 |
-42:52:53.4 |
HIP 86651 |
14.55 |
| 2026-08-11 00:00 |
17:43:23.30 |
-42:51:01.0 |
HIP 86651 |
12.40 |
| 2026-08-11 12:00 |
17:43:14.08 |
-42:49:08.2 |
HIP 86651 |
10.49 |
| 2026-08-12 00:00 |
17:43:05.15 |
-42:47:14.8 |
HIP 86651 |
8.94 |
| 2026-08-12 12:00 |
17:42:56.52 |
-42:45:21.1 |
HIP 86651 |
7.95 |
| 2026-08-13 00:00 |
17:42:48.19 |
-42:43:26.9 |
HIP 86651 |
7.71 |
| 2026-08-13 12:00 |
17:42:40.15 |
-42:41:32.2 |
HIP 86651 |
8.25 |
| 2026-08-14 00:00 |
17:42:32.41 |
-42:39:37.2 |
HIP 86651 |
9.42 |
| 2026-08-14 12:00 |
17:42:24.96 |
-42:37:41.8 |
HIP 86651 |
11.00 |
| 2026-08-15 00:00 |
17:42:17.81 |
-42:35:46.0 |
HIP 86651 |
12.83 |
| 2026-08-15 12:00 |
17:42:10.97 |
-42:33:49.8 |
HIP 86651 |
14.81 |
| 2026-08-16 00:00 |
17:42:04.42 |
-42:31:53.3 |
HIP 86651 |
16.87 |
| 2026-08-16 12:00 |
17:41:58.16 |
-42:29:56.5 |
HIP 86651 |
18.98 |
| 2026-08-17 00:00 |
17:41:52.21 |
-42:27:59.4 |
HIP 86651 |
21.11 |
| 2026-08-17 12:00 |
17:41:46.56 |
-42:26:02.1 |
HIP 86651 |
23.25 |
| 2026-08-18 00:00 |
17:41:41.20 |
-42:24:04.4 |
HIP 86651 |
25.39 |
| 2026-08-18 12:00 |
17:41:36.15 |
-42:22:06.5 |
HIP 86417 |
24.90 |
| 2026-08-19 00:00 |
17:41:31.39 |
-42:20:08.3 |
HIP 86417 |
23.50 |