P/2012 G1 (PANSTARRS)
메타데이터
| 항목 |
값 |
| Designation |
P/2012 G1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-03-21T12:15:24.851520Z |
| Orbit solution date (soln_date, UTC) |
2022-03-08T19:43:47Z |
| Obs used |
22 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-04-16.0000000 |
| e |
0.32992923 |
| q (au) |
2.794694 |
| a (au) |
4.170744 |
| i (deg) |
12.171310 |
| Ω (om, deg) |
283.395321 |
| ω (w, deg) |
265.751864 |
| M (ma, deg) |
2.949454 |
밝기
산란 + 전체 선형
$$
M_a = (16.018 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.018 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.773 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
01:16:06.89 |
+19:43:54.6 |
HIP 5687 |
41.72 |
| 2026-02-03 12:00 |
01:16:22.68 |
+19:44:17.9 |
HIP 5878 |
42.54 |
| 2026-02-04 00:00 |
01:16:38.60 |
+19:44:42.2 |
HIP 5878 |
43.43 |
| 2026-02-04 12:00 |
01:16:54.65 |
+19:45:07.6 |
HIP 5878 |
44.62 |
| 2026-02-05 00:00 |
01:17:10.83 |
+19:45:34.0 |
HIP 5878 |
46.10 |
| 2026-02-05 12:00 |
01:17:27.14 |
+19:46:01.4 |
HIP 5878 |
47.84 |
| 2026-02-06 00:00 |
01:17:43.57 |
+19:46:29.8 |
HIP 6299 |
45.01 |
| 2026-02-06 12:00 |
01:18:00.14 |
+19:46:59.2 |
HIP 6299 |
41.32 |
| 2026-02-07 00:00 |
01:18:16.83 |
+19:47:29.6 |
HIP 6299 |
37.64 |
| 2026-02-07 12:00 |
01:18:33.64 |
+19:48:01.0 |
HIP 6299 |
34.00 |
| 2026-02-08 00:00 |
01:18:50.58 |
+19:48:33.4 |
HIP 6299 |
30.44 |
| 2026-02-08 12:00 |
01:19:07.64 |
+19:49:06.8 |
HIP 6299 |
26.98 |
| 2026-02-09 00:00 |
01:19:24.83 |
+19:49:41.1 |
HIP 6299 |
23.70 |
| 2026-02-09 12:00 |
01:19:42.14 |
+19:50:16.5 |
HIP 6299 |
20.69 |
| 2026-02-10 00:00 |
01:19:59.57 |
+19:50:52.8 |
HIP 6299 |
18.11 |
| 2026-02-10 12:00 |
01:20:17.12 |
+19:51:30.0 |
HIP 6299 |
16.21 |
| 2026-02-11 00:00 |
01:20:34.79 |
+19:52:08.3 |
HIP 6299 |
15.24 |
| 2026-02-11 12:00 |
01:20:52.58 |
+19:52:47.5 |
HIP 6299 |
15.43 |
| 2026-02-12 00:00 |
01:21:10.49 |
+19:53:27.6 |
HIP 6299 |
16.74 |
| 2026-02-12 12:00 |
01:21:28.52 |
+19:54:08.7 |
HIP 6299 |
18.97 |
| 2026-02-13 00:00 |
01:21:46.66 |
+19:54:50.7 |
HIP 6299 |
21.86 |
| 2026-02-13 12:00 |
01:22:04.92 |
+19:55:33.7 |
HIP 6299 |
25.19 |
| 2026-02-14 00:00 |
01:22:23.29 |
+19:56:17.6 |
HIP 6538 |
23.98 |
| 2026-02-14 12:00 |
01:22:41.78 |
+19:57:02.4 |
HIP 6538 |
20.03 |
| 2026-02-15 00:00 |
01:23:00.38 |
+19:57:48.1 |
HIP 6538 |
16.30 |
| 2026-02-15 12:00 |
01:23:19.10 |
+19:58:34.7 |
HIP 6538 |
13.02 |
| 2026-02-16 00:00 |
01:23:37.92 |
+19:59:22.2 |
HIP 6538 |
10.64 |
| 2026-02-16 12:00 |
01:23:56.86 |
+20:00:10.7 |
HIP 6538 |
9.87 |
| 2026-02-17 00:00 |
01:24:15.91 |
+20:01:00.0 |
HIP 6538 |
11.10 |
| 2026-02-17 12:00 |
01:24:35.07 |
+20:01:50.2 |
HIP 6601 |
8.16 |
| 2026-02-18 00:00 |
01:24:54.33 |
+20:02:41.3 |
HIP 6642 |
4.55 |
| 2026-02-18 12:00 |
01:25:13.70 |
+20:03:33.3 |
HIP 6642 |
2.62 |
| 2026-02-19 00:00 |
01:25:33.18 |
+20:04:26.1 |
HIP 6642 |
6.02 |
| 2026-02-19 12:00 |
01:25:52.77 |
+20:05:19.8 |
HIP 6714 |
7.31 |
| 2026-02-20 00:00 |
01:26:12.46 |
+20:06:14.3 |
HIP 6714 |
3.28 |
| 2026-02-20 12:00 |
01:26:32.25 |
+20:07:09.7 |
HIP 6714 |
3.55 |
| 2026-02-21 00:00 |
01:26:52.15 |
+20:08:05.9 |
HIP 6714 |
7.73 |
| 2026-02-21 12:00 |
01:27:12.15 |
+20:09:03.0 |
HIP 6714 |
12.37 |
| 2026-02-22 00:00 |
01:27:32.25 |
+20:10:00.9 |
HIP 6714 |
17.12 |
| 2026-02-22 12:00 |
01:27:52.45 |
+20:10:59.6 |
HIP 6714 |
21.93 |
| 2026-02-23 00:00 |
01:28:12.75 |
+20:11:59.1 |
HIP 6937 |
23.60 |
| 2026-02-23 12:00 |
01:28:33.14 |
+20:12:59.4 |
HIP 6937 |
19.73 |
| 2026-02-24 00:00 |
01:28:53.64 |
+20:14:00.5 |
HIP 6937 |
16.40 |