메타데이터
| 항목 |
값 |
| Designation |
P/2015 M2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-08-31T03:13:30.483840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:13Z |
| Obs used |
152 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
11.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-01-31.0000000 |
| e |
0.17907655 |
| q (au) |
5.912783 |
| a (au) |
7.202599 |
| i (deg) |
3.973865 |
| Ω (om, deg) |
86.611339 |
| ω (w, deg) |
224.786932 |
| M (ma, deg) |
7.794352 |
밝기
산란 + 전체 선형
$$
M_a = (8.209 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.209 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.779 |
| k |
0.800 |
| δ90 |
9.999 |
| 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 |
10:21:03.92 |
+13:41:58.7 |
HIP 50884 |
36.51 |
| 2026-09-20 12:00 |
10:21:18.75 |
+13:40:41.5 |
HIP 50884 |
33.65 |
| 2026-09-21 00:00 |
10:21:33.54 |
+13:39:24.6 |
HIP 50884 |
31.00 |
| 2026-09-21 12:00 |
10:21:48.30 |
+13:38:07.8 |
HIP 50884 |
28.61 |
| 2026-09-22 00:00 |
10:22:03.02 |
+13:36:51.3 |
HIP 50884 |
26.57 |
| 2026-09-22 12:00 |
10:22:17.71 |
+13:35:35.0 |
HIP 50884 |
24.94 |
| 2026-09-23 00:00 |
10:22:32.37 |
+13:34:18.9 |
HIP 50884 |
23.80 |
| 2026-09-23 12:00 |
10:22:46.99 |
+13:33:03.0 |
HIP 50884 |
23.24 |
| 2026-09-24 00:00 |
10:23:01.57 |
+13:31:47.4 |
HIP 50884 |
23.27 |
| 2026-09-24 12:00 |
10:23:16.12 |
+13:30:32.0 |
HIP 50884 |
23.90 |
| 2026-09-25 00:00 |
10:23:30.63 |
+13:29:16.8 |
HIP 50884 |
25.08 |
| 2026-09-25 12:00 |
10:23:45.11 |
+13:28:01.9 |
HIP 50884 |
26.72 |
| 2026-09-26 00:00 |
10:23:59.54 |
+13:26:47.2 |
HIP 50884 |
28.76 |
| 2026-09-26 12:00 |
10:24:13.94 |
+13:25:32.7 |
HIP 50884 |
31.10 |
| 2026-09-27 00:00 |
10:24:28.30 |
+13:24:18.5 |
HIP 51070 |
28.13 |
| 2026-09-27 12:00 |
10:24:42.62 |
+13:23:04.6 |
HIP 51070 |
24.54 |
| 2026-09-28 00:00 |
10:24:56.90 |
+13:21:50.9 |
HIP 51070 |
21.00 |
| 2026-09-28 12:00 |
10:25:11.15 |
+13:20:37.4 |
HIP 51070 |
17.54 |
| 2026-09-29 00:00 |
10:25:25.35 |
+13:19:24.2 |
HIP 51070 |
14.19 |
| 2026-09-29 12:00 |
10:25:39.50 |
+13:18:11.3 |
HIP 51070 |
11.05 |
| 2026-09-30 00:00 |
10:25:53.62 |
+13:16:58.7 |
HIP 51070 |
8.35 |
| 2026-09-30 12:00 |
10:26:07.70 |
+13:15:46.3 |
HIP 51070 |
6.62 |
| 2026-10-01 00:00 |
10:26:21.73 |
+13:14:34.2 |
HIP 51070 |
6.66 |
| 2026-10-01 12:00 |
10:26:35.72 |
+13:13:22.3 |
HIP 51070 |
8.43 |
| 2026-10-02 00:00 |
10:26:49.66 |
+13:12:10.8 |
HIP 51070 |
11.12 |
| 2026-10-02 12:00 |
10:27:03.56 |
+13:10:59.5 |
HIP 51070 |
14.20 |
| 2026-10-03 00:00 |
10:27:17.42 |
+13:09:48.6 |
HIP 51208 |
11.80 |
| 2026-10-03 12:00 |
10:27:31.23 |
+13:08:37.9 |
HIP 51208 |
9.86 |
| 2026-10-04 00:00 |
10:27:44.99 |
+13:07:27.5 |
HIP 51208 |
8.98 |
| 2026-10-04 12:00 |
10:27:58.71 |
+13:06:17.4 |
HIP 51208 |
9.44 |
| 2026-10-05 00:00 |
10:28:12.37 |
+13:05:07.6 |
HIP 51208 |
11.07 |
| 2026-10-05 12:00 |
10:28:25.99 |
+13:03:58.2 |
HIP 51208 |
13.44 |
| 2026-10-06 00:00 |
10:28:39.57 |
+13:02:49.0 |
HIP 51295 |
14.53 |
| 2026-10-06 12:00 |
10:28:53.09 |
+13:01:40.2 |
HIP 51295 |
15.87 |
| 2026-10-07 00:00 |
10:29:06.56 |
+13:00:31.7 |
HIP 51295 |
17.80 |
| 2026-10-07 12:00 |
10:29:19.98 |
+12:59:23.5 |
HIP 51295 |
20.13 |
| 2026-10-08 00:00 |
10:29:33.35 |
+12:58:15.6 |
HIP 51295 |
22.74 |
| 2026-10-08 12:00 |
10:29:46.67 |
+12:57:08.1 |
HIP 51295 |
25.53 |
| 2026-10-09 00:00 |
10:29:59.94 |
+12:56:01.0 |
HIP 51295 |
28.46 |
| 2026-10-09 12:00 |
10:30:13.15 |
+12:54:54.1 |
HIP 51590 |
30.17 |
| 2026-10-10 00:00 |
10:30:26.31 |
+12:53:47.6 |
HIP 51590 |
27.00 |
| 2026-10-10 12:00 |
10:30:39.42 |
+12:52:41.5 |
HIP 51590 |
23.90 |
| 2026-10-11 00:00 |
10:30:52.47 |
+12:51:35.7 |
HIP 51590 |
20.90 |