P/2012 F2 (PANSTARRS)
메타데이터
| 항목 |
값 |
| Designation |
P/2012 F2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-04-10T00:22:20.953920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:05Z |
| Obs used |
100 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
8.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-12-31.0000000 |
| e |
0.54223975 |
| q (au) |
2.897068 |
| a (au) |
6.328788 |
| i (deg) |
14.724691 |
| Ω (om, deg) |
227.135164 |
| ω (w, deg) |
33.192840 |
| M (ma, deg) |
353.808575 |
밝기
산란 + 전체 선형
$$
M_a = (10.654 + 3.510\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.654 |
| n |
3.510 |
| gf |
1.000 |
| gb |
-0.553 |
| 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 |
08:23:05.82 |
+02:00:37.6 |
HIP 41142 |
13.02 |
| 2026-02-03 12:00 |
08:22:52.40 |
+02:01:31.0 |
HIP 41012 |
12.71 |
| 2026-02-04 00:00 |
08:22:39.01 |
+02:02:25.1 |
HIP 41012 |
9.57 |
| 2026-02-04 12:00 |
08:22:25.65 |
+02:03:19.8 |
HIP 41012 |
6.75 |
| 2026-02-05 00:00 |
08:22:12.32 |
+02:04:15.1 |
HIP 41012 |
4.84 |
| 2026-02-05 12:00 |
08:21:59.02 |
+02:05:11.1 |
HIP 41012 |
5.00 |
| 2026-02-06 00:00 |
08:21:45.76 |
+02:06:07.7 |
HIP 41012 |
7.08 |
| 2026-02-06 12:00 |
08:21:32.53 |
+02:07:04.9 |
HIP 41012 |
9.94 |
| 2026-02-07 00:00 |
08:21:19.35 |
+02:08:02.7 |
HIP 41012 |
13.07 |
| 2026-02-07 12:00 |
08:21:06.20 |
+02:09:01.2 |
HIP 41012 |
16.32 |
| 2026-02-08 00:00 |
08:20:53.10 |
+02:10:00.2 |
HIP 40912 |
18.58 |
| 2026-02-08 12:00 |
08:20:40.04 |
+02:10:59.8 |
HIP 40912 |
18.12 |
| 2026-02-09 00:00 |
08:20:27.03 |
+02:12:00.0 |
HIP 40912 |
18.29 |
| 2026-02-09 12:00 |
08:20:14.07 |
+02:13:00.7 |
HIP 40912 |
19.06 |
| 2026-02-10 00:00 |
08:20:01.16 |
+02:14:02.0 |
HIP 40912 |
20.36 |
| 2026-02-10 12:00 |
08:19:48.30 |
+02:15:03.9 |
HIP 40745 |
19.86 |
| 2026-02-11 00:00 |
08:19:35.49 |
+02:16:06.3 |
HIP 40745 |
17.32 |
| 2026-02-11 12:00 |
08:19:22.74 |
+02:17:09.3 |
HIP 40745 |
15.10 |
| 2026-02-12 00:00 |
08:19:10.05 |
+02:18:12.7 |
HIP 40745 |
13.36 |
| 2026-02-12 12:00 |
08:18:57.42 |
+02:19:16.7 |
HIP 40745 |
12.28 |
| 2026-02-13 00:00 |
08:18:44.85 |
+02:20:21.2 |
HIP 40745 |
12.05 |
| 2026-02-13 12:00 |
08:18:32.34 |
+02:21:26.1 |
HIP 40648 |
11.87 |
| 2026-02-14 00:00 |
08:18:19.90 |
+02:22:31.6 |
HIP 40648 |
8.69 |
| 2026-02-14 12:00 |
08:18:07.52 |
+02:23:37.5 |
HIP 40648 |
5.63 |
| 2026-02-15 00:00 |
08:17:55.22 |
+02:24:43.9 |
HIP 40648 |
3.08 |
| 2026-02-15 12:00 |
08:17:42.98 |
+02:25:50.8 |
HIP 40648 |
2.91 |
| 2026-02-16 00:00 |
08:17:30.82 |
+02:26:58.1 |
HIP 40648 |
5.33 |
| 2026-02-16 12:00 |
08:17:18.73 |
+02:28:05.8 |
HIP 40648 |
8.31 |
| 2026-02-17 00:00 |
08:17:06.72 |
+02:29:14.0 |
HIP 40648 |
11.40 |
| 2026-02-17 12:00 |
08:16:54.79 |
+02:30:22.5 |
HIP 40648 |
14.53 |
| 2026-02-18 00:00 |
08:16:42.94 |
+02:31:31.5 |
HIP 40479 |
13.05 |
| 2026-02-18 12:00 |
08:16:31.17 |
+02:32:40.9 |
HIP 40479 |
10.82 |
| 2026-02-19 00:00 |
08:16:19.48 |
+02:33:50.6 |
HIP 40479 |
9.16 |
| 2026-02-19 12:00 |
08:16:07.88 |
+02:35:00.7 |
HIP 40479 |
8.41 |
| 2026-02-20 00:00 |
08:15:56.36 |
+02:36:11.2 |
HIP 40479 |
8.79 |
| 2026-02-20 12:00 |
08:15:44.93 |
+02:37:22.0 |
HIP 40479 |
10.16 |
| 2026-02-21 00:00 |
08:15:33.60 |
+02:38:33.2 |
HIP 40473 |
10.23 |
| 2026-02-21 12:00 |
08:15:22.35 |
+02:39:44.7 |
HIP 40450 |
10.44 |
| 2026-02-22 00:00 |
08:15:11.20 |
+02:40:56.5 |
HIP 40450 |
10.31 |
| 2026-02-22 12:00 |
08:15:00.14 |
+02:42:08.6 |
HIP 40450 |
11.03 |
| 2026-02-23 00:00 |
08:14:49.18 |
+02:43:21.0 |
HIP 40450 |
12.43 |
| 2026-02-23 12:00 |
08:14:38.32 |
+02:44:33.7 |
HIP 40450 |
14.31 |
| 2026-02-24 00:00 |
08:14:27.55 |
+02:45:46.7 |
HIP 40450 |
16.48 |