메타데이터
| 항목 |
값 |
| Designation |
211P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-01-27T02:47:26.427840Z |
| Orbit solution date (soln_date, UTC) |
2024-05-14T12:42:30Z |
| Obs used |
854 |
| NEO |
- |
| M1 |
7.800 |
| K1 |
24.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-03-20.0000000 |
| e |
0.33923044 |
| q (au) |
2.351929 |
| a (au) |
3.559379 |
| i (deg) |
18.888227 |
| Ω (om, deg) |
117.272120 |
| ω (w, deg) |
4.337626 |
| M (ma, deg) |
260.471637 |
밝기
산란 + 전체 선형
$$
M_a = (11.022 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.022 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.818 |
| k |
0.999 |
| 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 |
21:08:33.62 |
-18:49:44.7 |
HIP 104387 |
7.23 |
| 2026-03-26 12:00 |
21:08:56.84 |
-18:48:55.5 |
HIP 104387 |
5.55 |
| 2026-03-27 00:00 |
21:09:19.97 |
-18:48:06.8 |
HIP 104387 |
8.41 |
| 2026-03-27 12:00 |
21:09:42.99 |
-18:47:18.5 |
HIP 104387 |
13.10 |
| 2026-03-28 00:00 |
21:10:05.92 |
-18:46:30.7 |
HIP 104387 |
18.23 |
| 2026-03-28 12:00 |
21:10:28.75 |
-18:45:43.3 |
HIP 104387 |
23.49 |
| 2026-03-29 00:00 |
21:10:51.47 |
-18:44:56.3 |
HIP 104540 |
25.50 |
| 2026-03-29 12:00 |
21:11:14.09 |
-18:44:09.9 |
HIP 104540 |
26.25 |
| 2026-03-30 00:00 |
21:11:36.61 |
-18:43:23.8 |
HIP 104540 |
28.04 |
| 2026-03-30 12:00 |
21:11:59.03 |
-18:42:38.3 |
HIP 104540 |
30.68 |
| 2026-03-31 00:00 |
21:12:21.34 |
-18:41:53.2 |
HIP 104540 |
33.95 |
| 2026-03-31 12:00 |
21:12:43.55 |
-18:41:08.7 |
HIP 104540 |
37.68 |
| 2026-04-01 00:00 |
21:13:05.65 |
-18:40:24.6 |
HIP 104777 |
39.78 |
| 2026-04-01 12:00 |
21:13:27.65 |
-18:39:41.0 |
HIP 104777 |
39.96 |
| 2026-04-02 00:00 |
21:13:49.54 |
-18:38:57.9 |
HIP 104915 |
37.74 |
| 2026-04-02 12:00 |
21:14:11.33 |
-18:38:15.4 |
HIP 104915 |
34.80 |
| 2026-04-03 00:00 |
21:14:33.00 |
-18:37:33.3 |
HIP 104915 |
32.45 |
| 2026-04-03 12:00 |
21:14:54.57 |
-18:36:51.8 |
HIP 104915 |
30.81 |
| 2026-04-04 00:00 |
21:15:16.03 |
-18:36:10.8 |
HIP 104915 |
30.00 |
| 2026-04-04 12:00 |
21:15:37.38 |
-18:35:30.4 |
HIP 104915 |
30.05 |
| 2026-04-05 00:00 |
21:15:58.62 |
-18:34:50.5 |
HIP 104915 |
30.96 |
| 2026-04-05 12:00 |
21:16:19.74 |
-18:34:11.2 |
HIP 105165 |
27.38 |
| 2026-04-06 00:00 |
21:16:40.76 |
-18:33:32.4 |
HIP 105165 |
22.81 |
| 2026-04-06 12:00 |
21:17:01.66 |
-18:32:54.2 |
HIP 105165 |
18.51 |
| 2026-04-07 00:00 |
21:17:22.44 |
-18:32:16.5 |
HIP 105165 |
14.67 |
| 2026-04-07 12:00 |
21:17:43.12 |
-18:31:39.5 |
HIP 105165 |
11.71 |
| 2026-04-08 00:00 |
21:18:03.67 |
-18:31:03.0 |
HIP 105165 |
10.37 |
| 2026-04-08 12:00 |
21:18:24.11 |
-18:30:27.2 |
HIP 105165 |
11.22 |
| 2026-04-09 00:00 |
21:18:44.43 |
-18:29:51.9 |
HIP 105165 |
13.83 |
| 2026-04-09 12:00 |
21:19:04.64 |
-18:29:17.3 |
HIP 105165 |
17.40 |
| 2026-04-10 00:00 |
21:19:24.72 |
-18:28:43.3 |
HIP 105165 |
21.43 |
| 2026-04-10 12:00 |
21:19:44.68 |
-18:28:09.9 |
HIP 105165 |
25.70 |
| 2026-04-11 00:00 |
21:20:04.53 |
-18:27:37.2 |
HIP 105465 |
28.80 |
| 2026-04-11 12:00 |
21:20:24.25 |
-18:27:05.1 |
HIP 105465 |
25.47 |
| 2026-04-12 00:00 |
21:20:43.85 |
-18:26:33.7 |
HIP 105465 |
22.64 |
| 2026-04-12 12:00 |
21:21:03.32 |
-18:26:02.9 |
HIP 105465 |
20.50 |
| 2026-04-13 00:00 |
21:21:22.67 |
-18:25:32.8 |
HIP 105465 |
19.26 |
| 2026-04-13 12:00 |
21:21:41.90 |
-18:25:03.3 |
HIP 105465 |
19.08 |
| 2026-04-14 00:00 |
21:22:01.00 |
-18:24:34.6 |
HIP 105465 |
19.95 |
| 2026-04-14 12:00 |
21:22:19.97 |
-18:24:06.5 |
HIP 105611 |
17.02 |
| 2026-04-15 00:00 |
21:22:38.81 |
-18:23:39.2 |
HIP 105611 |
12.83 |
| 2026-04-15 12:00 |
21:22:57.52 |
-18:23:12.5 |
HIP 105611 |
8.96 |
| 2026-04-16 00:00 |
21:23:16.11 |
-18:22:46.6 |
HIP 105611 |
6.02 |