메타데이터
| 항목 |
값 |
| Designation |
C/2015 M3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-08-26T05:34:05.033280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:13Z |
| Obs used |
150 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-09-03.0000000 |
| e |
0.97327847 |
| q (au) |
3.552414 |
| a (au) |
132.942015 |
| i (deg) |
65.951065 |
| Ω (om, deg) |
143.092842 |
| ω (w, deg) |
123.762544 |
| M (ma, deg) |
0.004995 |
밝기
산란 + 전체 선형
$$
M_a = (14.907 + 2.182\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.907 |
| n |
2.182 |
| gf |
0.967 |
| gb |
-0.511 |
| k |
0.800 |
| δ90 |
9.982 |
| 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) |
| 2026-07-29 00:00 |
03:58:01.17 |
-46:24:41.3 |
HIP 18534 |
2.38 |
| 2026-07-29 12:00 |
03:58:04.84 |
-46:25:38.0 |
HIP 18534 |
3.51 |
| 2026-07-30 00:00 |
03:58:08.46 |
-46:26:34.9 |
HIP 18534 |
4.63 |
| 2026-07-30 12:00 |
03:58:12.03 |
-46:27:32.1 |
HIP 18534 |
5.76 |
| 2026-07-31 00:00 |
03:58:15.54 |
-46:28:29.5 |
HIP 18534 |
6.89 |
| 2026-07-31 12:00 |
03:58:19.01 |
-46:29:27.3 |
HIP 18534 |
8.02 |
| 2026-08-01 00:00 |
03:58:22.42 |
-46:30:25.3 |
HIP 18534 |
9.15 |
| 2026-08-01 12:00 |
03:58:25.79 |
-46:31:23.6 |
HIP 18534 |
10.28 |
| 2026-08-02 00:00 |
03:58:29.10 |
-46:32:22.2 |
HIP 18534 |
11.40 |
| 2026-08-02 12:00 |
03:58:32.36 |
-46:33:21.0 |
HIP 18534 |
12.53 |
| 2026-08-03 00:00 |
03:58:35.57 |
-46:34:20.1 |
HIP 18638 |
13.57 |
| 2026-08-03 12:00 |
03:58:38.73 |
-46:35:19.4 |
HIP 18638 |
12.45 |
| 2026-08-04 00:00 |
03:58:41.84 |
-46:36:19.0 |
HIP 18638 |
11.34 |
| 2026-08-04 12:00 |
03:58:44.89 |
-46:37:18.8 |
HIP 18638 |
10.23 |
| 2026-08-05 00:00 |
03:58:47.89 |
-46:38:18.9 |
HIP 18638 |
9.12 |
| 2026-08-05 12:00 |
03:58:50.84 |
-46:39:19.2 |
HIP 18638 |
8.03 |
| 2026-08-06 00:00 |
03:58:53.73 |
-46:40:19.8 |
HIP 18638 |
6.94 |
| 2026-08-06 12:00 |
03:58:56.57 |
-46:41:20.6 |
HIP 18638 |
5.88 |
| 2026-08-07 00:00 |
03:58:59.36 |
-46:42:21.6 |
HIP 18638 |
4.85 |
| 2026-08-07 12:00 |
03:59:02.09 |
-46:43:22.9 |
HIP 18638 |
3.88 |
| 2026-08-08 00:00 |
03:59:04.77 |
-46:44:24.3 |
HIP 18638 |
3.03 |
| 2026-08-08 12:00 |
03:59:07.39 |
-46:45:26.0 |
HIP 18638 |
2.41 |
| 2026-08-09 00:00 |
03:59:09.96 |
-46:46:27.9 |
HIP 18638 |
2.25 |
| 2026-08-09 12:00 |
03:59:12.47 |
-46:47:30.0 |
HIP 18638 |
2.61 |
| 2026-08-10 00:00 |
03:59:14.93 |
-46:48:32.4 |
HIP 18638 |
3.34 |
| 2026-08-10 12:00 |
03:59:17.34 |
-46:49:34.9 |
HIP 18638 |
4.25 |
| 2026-08-11 00:00 |
03:59:19.68 |
-46:50:37.6 |
HIP 18638 |
5.25 |
| 2026-08-11 12:00 |
03:59:21.97 |
-46:51:40.5 |
HIP 18638 |
6.29 |
| 2026-08-12 00:00 |
03:59:24.21 |
-46:52:43.6 |
HIP 18638 |
7.35 |
| 2026-08-12 12:00 |
03:59:26.39 |
-46:53:46.9 |
HIP 18638 |
8.43 |
| 2026-08-13 00:00 |
03:59:28.51 |
-46:54:50.3 |
HIP 18638 |
9.53 |
| 2026-08-13 12:00 |
03:59:30.57 |
-46:55:53.9 |
HIP 18638 |
10.62 |
| 2026-08-14 00:00 |
03:59:32.58 |
-46:56:57.7 |
HIP 18638 |
11.73 |
| 2026-08-14 12:00 |
03:59:34.53 |
-46:58:01.6 |
HIP 18638 |
12.83 |
| 2026-08-15 00:00 |
03:59:36.43 |
-46:59:05.7 |
HIP 18638 |
13.94 |
| 2026-08-15 12:00 |
03:59:38.26 |
-47:00:10.0 |
HIP 18638 |
15.05 |
| 2026-08-16 00:00 |
03:59:40.04 |
-47:01:14.4 |
HIP 18638 |
16.17 |
| 2026-08-16 12:00 |
03:59:41.76 |
-47:02:18.9 |
HIP 18638 |
17.28 |
| 2026-08-17 00:00 |
03:59:43.43 |
-47:03:23.6 |
HIP 18638 |
18.39 |
| 2026-08-17 12:00 |
03:59:45.03 |
-47:04:28.4 |
HIP 18638 |
19.50 |
| 2026-08-18 00:00 |
03:59:46.58 |
-47:05:33.4 |
HIP 18638 |
20.62 |
| 2026-08-18 12:00 |
03:59:48.07 |
-47:06:38.4 |
HIP 18638 |
21.73 |
| 2026-08-19 00:00 |
03:59:49.50 |
-47:07:43.6 |
HIP 18638 |
22.84 |