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
$$
M_a = (10.540 + 3.608\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.540 |
| n |
3.608 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-09-20 00:00 |
09:32:00.43 |
+00:57:49.8 |
HIP 46633 |
27.66 |
| 2026-09-20 12:00 |
09:32:19.06 |
+00:55:46.0 |
HIP 46633 |
32.59 |
| 2026-09-21 00:00 |
09:32:37.64 |
+00:53:41.9 |
HIP 47010 |
36.28 |
| 2026-09-21 12:00 |
09:32:56.17 |
+00:51:37.6 |
HIP 47010 |
31.20 |
| 2026-09-22 00:00 |
09:33:14.65 |
+00:49:33.0 |
HIP 47010 |
26.14 |
| 2026-09-22 12:00 |
09:33:33.08 |
+00:47:28.3 |
HIP 47010 |
21.09 |
| 2026-09-23 00:00 |
09:33:51.46 |
+00:45:23.3 |
HIP 47010 |
16.05 |
| 2026-09-23 12:00 |
09:34:09.78 |
+00:43:18.1 |
HIP 47010 |
11.02 |
| 2026-09-24 00:00 |
09:34:28.05 |
+00:41:12.7 |
HIP 47010 |
6.02 |
| 2026-09-24 12:00 |
09:34:46.27 |
+00:39:07.1 |
HIP 47010 |
1.26 |
| 2026-09-25 00:00 |
09:35:04.44 |
+00:37:01.3 |
HIP 47010 |
4.13 |
| 2026-09-25 12:00 |
09:35:22.55 |
+00:34:55.3 |
HIP 47010 |
9.08 |
| 2026-09-26 00:00 |
09:35:40.61 |
+00:32:49.0 |
HIP 47010 |
14.04 |
| 2026-09-26 12:00 |
09:35:58.61 |
+00:30:42.6 |
HIP 47195 |
17.15 |
| 2026-09-27 00:00 |
09:36:16.55 |
+00:28:36.0 |
HIP 47195 |
12.78 |
| 2026-09-27 12:00 |
09:36:34.44 |
+00:26:29.3 |
HIP 47195 |
9.05 |
| 2026-09-28 00:00 |
09:36:52.27 |
+00:24:22.3 |
HIP 47195 |
7.04 |
| 2026-09-28 12:00 |
09:37:10.05 |
+00:22:15.2 |
HIP 47195 |
8.12 |
| 2026-09-29 00:00 |
09:37:27.76 |
+00:20:07.9 |
HIP 47195 |
11.43 |
| 2026-09-29 12:00 |
09:37:45.42 |
+00:18:00.4 |
HIP 47195 |
15.60 |
| 2026-09-30 00:00 |
09:38:03.01 |
+00:15:52.7 |
HIP 47195 |
20.09 |
| 2026-09-30 12:00 |
09:38:20.54 |
+00:13:44.9 |
HIP 47195 |
24.72 |
| 2026-10-01 00:00 |
09:38:38.02 |
+00:11:37.0 |
HIP 47195 |
29.43 |
| 2026-10-01 12:00 |
09:38:55.43 |
+00:09:28.8 |
HIP 47252 |
32.45 |
| 2026-10-02 00:00 |
09:39:12.78 |
+00:07:20.6 |
HIP 47252 |
32.95 |
| 2026-10-02 12:00 |
09:39:30.06 |
+00:05:12.1 |
HIP 47252 |
34.13 |
| 2026-10-03 00:00 |
09:39:47.28 |
+00:03:03.6 |
HIP 47252 |
35.90 |
| 2026-10-03 12:00 |
09:40:04.44 |
+00:00:54.9 |
HIP 47252 |
38.19 |
| 2026-10-04 00:00 |
09:40:21.52 |
-00:01:13.9 |
HIP 47604 |
34.19 |
| 2026-10-04 12:00 |
09:40:38.55 |
-00:03:22.9 |
HIP 47604 |
29.43 |
| 2026-10-05 00:00 |
09:40:55.50 |
-00:05:31.9 |
HIP 47604 |
24.67 |
| 2026-10-05 12:00 |
09:41:12.39 |
-00:07:41.1 |
HIP 47604 |
19.93 |
| 2026-10-06 00:00 |
09:41:29.21 |
-00:09:50.4 |
HIP 47604 |
15.21 |
| 2026-10-06 12:00 |
09:41:45.96 |
-00:11:59.8 |
HIP 47604 |
10.50 |
| 2026-10-07 00:00 |
09:42:02.63 |
-00:14:09.3 |
HIP 47604 |
5.80 |
| 2026-10-07 12:00 |
09:42:19.24 |
-00:16:18.9 |
HIP 47604 |
1.13 |
| 2026-10-08 00:00 |
09:42:35.78 |
-00:18:28.6 |
HIP 47604 |
3.54 |
| 2026-10-08 12:00 |
09:42:52.24 |
-00:20:38.3 |
HIP 47604 |
8.19 |
| 2026-10-09 00:00 |
09:43:08.62 |
-00:22:48.2 |
HIP 47604 |
12.82 |
| 2026-10-09 12:00 |
09:43:24.94 |
-00:24:58.1 |
HIP 47604 |
17.44 |
| 2026-10-10 00:00 |
09:43:41.17 |
-00:27:08.0 |
HIP 47604 |
22.04 |
| 2026-10-10 12:00 |
09:43:57.34 |
-00:29:18.0 |
HIP 47849 |
18.57 |
| 2026-10-11 00:00 |
09:44:13.42 |
-00:31:28.1 |
HIP 47849 |
14.93 |