메타데이터
| 항목 |
값 |
| Designation |
P/2014 A2 (Hill) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-10-28T08:06:33.264000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:44Z |
| Obs used |
123 |
| NEO |
- |
| M1 |
17.000 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-01-19.0000000 |
| e |
0.64983414 |
| q (au) |
2.074675 |
| a (au) |
5.924835 |
| i (deg) |
24.513480 |
| Ω (om, deg) |
106.672024 |
| ω (w, deg) |
356.226385 |
| M (ma, deg) |
5.649321 |
밝기
산란 + 전체 선형
$$
M_a = (14.070 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.070 |
| n |
6.000 |
| gf |
0.989 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
3.155 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
23:49:28.86 |
-22:09:50.0 |
HIP 117556 |
14.07 |
| 2026-06-01 12:00 |
23:49:44.31 |
-22:10:31.8 |
HIP 117556 |
10.48 |
| 2026-06-02 00:00 |
23:49:59.65 |
-22:11:15.0 |
HIP 117556 |
6.96 |
| 2026-06-02 12:00 |
23:50:14.87 |
-22:11:59.4 |
HIP 117556 |
3.66 |
| 2026-06-03 00:00 |
23:50:29.98 |
-22:12:45.2 |
HIP 117556 |
2.04 |
| 2026-06-03 12:00 |
23:50:44.97 |
-22:13:32.3 |
HIP 117556 |
4.49 |
| 2026-06-04 00:00 |
23:50:59.84 |
-22:14:20.7 |
HIP 117556 |
7.82 |
| 2026-06-04 12:00 |
23:51:14.59 |
-22:15:10.5 |
HIP 117556 |
11.24 |
| 2026-06-05 00:00 |
23:51:29.23 |
-22:16:01.6 |
HIP 117556 |
14.68 |
| 2026-06-05 12:00 |
23:51:43.74 |
-22:16:54.1 |
HIP 117556 |
18.12 |
| 2026-06-06 00:00 |
23:51:58.13 |
-22:17:47.9 |
HIP 117556 |
21.54 |
| 2026-06-06 12:00 |
23:52:12.40 |
-22:18:43.1 |
HIP 117556 |
24.94 |
| 2026-06-07 00:00 |
23:52:26.55 |
-22:19:39.6 |
HIP 117556 |
28.33 |
| 2026-06-07 12:00 |
23:52:40.57 |
-22:20:37.5 |
HIP 117556 |
31.69 |
| 2026-06-08 00:00 |
23:52:54.47 |
-22:21:36.8 |
HIP 117556 |
35.04 |
| 2026-06-08 12:00 |
23:53:08.24 |
-22:22:37.5 |
HIP 117556 |
38.36 |
| 2026-06-09 00:00 |
23:53:21.88 |
-22:23:39.5 |
HIP 117556 |
41.66 |
| 2026-06-09 12:00 |
23:53:35.40 |
-22:24:42.9 |
HIP 117879 |
39.49 |
| 2026-06-10 00:00 |
23:53:48.78 |
-22:25:47.7 |
HIP 117879 |
37.43 |
| 2026-06-10 12:00 |
23:54:02.04 |
-22:26:53.9 |
HIP 117879 |
35.54 |
| 2026-06-11 00:00 |
23:54:15.16 |
-22:28:01.5 |
HIP 117879 |
33.84 |
| 2026-06-11 12:00 |
23:54:28.15 |
-22:29:10.5 |
HIP 117879 |
32.35 |
| 2026-06-12 00:00 |
23:54:41.01 |
-22:30:20.8 |
HIP 117879 |
31.10 |
| 2026-06-12 12:00 |
23:54:53.73 |
-22:31:32.6 |
HIP 117879 |
30.11 |
| 2026-06-13 00:00 |
23:55:06.32 |
-22:32:45.8 |
HIP 117879 |
29.40 |
| 2026-06-13 12:00 |
23:55:18.77 |
-22:34:00.4 |
HIP 118046 |
27.15 |
| 2026-06-14 00:00 |
23:55:31.08 |
-22:35:16.4 |
HIP 118046 |
24.31 |
| 2026-06-14 12:00 |
23:55:43.25 |
-22:36:33.9 |
HIP 118046 |
21.55 |
| 2026-06-15 00:00 |
23:55:55.28 |
-22:37:52.7 |
HIP 118046 |
18.88 |
| 2026-06-15 12:00 |
23:56:07.17 |
-22:39:13.0 |
HIP 118046 |
16.35 |
| 2026-06-16 00:00 |
23:56:18.92 |
-22:40:34.6 |
HIP 118046 |
14.02 |
| 2026-06-16 12:00 |
23:56:30.53 |
-22:41:57.7 |
HIP 118046 |
11.98 |
| 2026-06-17 00:00 |
23:56:41.99 |
-22:43:22.2 |
HIP 118046 |
10.41 |
| 2026-06-17 12:00 |
23:56:53.31 |
-22:44:48.2 |
HIP 118046 |
9.50 |
| 2026-06-18 00:00 |
23:57:04.48 |
-22:46:15.5 |
HIP 118046 |
9.45 |
| 2026-06-18 12:00 |
23:57:15.50 |
-22:47:44.3 |
HIP 118046 |
10.24 |
| 2026-06-19 00:00 |
23:57:26.38 |
-22:49:14.5 |
HIP 118046 |
11.70 |
| 2026-06-19 12:00 |
23:57:37.11 |
-22:50:46.0 |
HIP 118046 |
13.59 |
| 2026-06-20 00:00 |
23:57:47.69 |
-22:52:19.1 |
HIP 118046 |
15.76 |
| 2026-06-20 12:00 |
23:57:58.12 |
-22:53:53.5 |
HIP 118236 |
15.22 |
| 2026-06-21 00:00 |
23:58:08.40 |
-22:55:29.3 |
HIP 118236 |
12.38 |
| 2026-06-21 12:00 |
23:58:18.52 |
-22:57:06.6 |
HIP 118236 |
9.58 |
| 2026-06-22 00:00 |
23:58:28.50 |
-22:58:45.2 |
HIP 118236 |
6.84 |