C/2020 S2 (PANSTARRS)
메타데이터
| 항목 |
값 |
| Designation |
C/2020 S2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-12-21T22:27:29.819520Z |
| Orbit solution date (soln_date, UTC) |
2022-09-27T15:42:34Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
16.300 |
| K1 |
13.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-09-16T07:49:20.697600Z |
| Discovery magnitude (MPC) |
20.75 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-10-15.0000000 |
| e |
0.82748820 |
| q (au) |
1.756056 |
| a (au) |
10.179340 |
| i (deg) |
22.397832 |
| Ω (om, deg) |
197.685362 |
| ω (w, deg) |
202.263038 |
| M (ma, deg) |
357.938311 |
밝기
산란 + 전체 선형
$$
M_a = (15.508 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.508 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
12:59:31.17 |
-08:35:54.3 |
HIP 63362 |
11.48 |
| 2026-02-03 12:00 |
12:59:28.11 |
-08:35:31.4 |
HIP 63362 |
11.28 |
| 2026-02-04 00:00 |
12:59:24.97 |
-08:35:08.0 |
HIP 63362 |
11.13 |
| 2026-02-04 12:00 |
12:59:21.76 |
-08:34:44.0 |
HIP 63362 |
11.05 |
| 2026-02-05 00:00 |
12:59:18.47 |
-08:34:19.6 |
HIP 63362 |
11.04 |
| 2026-02-05 12:00 |
12:59:15.10 |
-08:33:54.7 |
HIP 63362 |
11.10 |
| 2026-02-06 00:00 |
12:59:11.66 |
-08:33:29.2 |
HIP 63362 |
11.24 |
| 2026-02-06 12:00 |
12:59:08.14 |
-08:33:03.3 |
HIP 63362 |
11.47 |
| 2026-02-07 00:00 |
12:59:04.55 |
-08:32:36.8 |
HIP 63362 |
11.78 |
| 2026-02-07 12:00 |
12:59:00.88 |
-08:32:09.9 |
HIP 63362 |
12.17 |
| 2026-02-08 00:00 |
12:58:57.13 |
-08:31:42.5 |
HIP 63362 |
12.64 |
| 2026-02-08 12:00 |
12:58:53.31 |
-08:31:14.5 |
HIP 63362 |
13.18 |
| 2026-02-09 00:00 |
12:58:49.42 |
-08:30:46.1 |
HIP 63362 |
13.79 |
| 2026-02-09 12:00 |
12:58:45.45 |
-08:30:17.2 |
HIP 63362 |
14.47 |
| 2026-02-10 00:00 |
12:58:41.41 |
-08:29:47.8 |
HIP 63362 |
15.21 |
| 2026-02-10 12:00 |
12:58:37.30 |
-08:29:17.8 |
HIP 63362 |
16.01 |
| 2026-02-11 00:00 |
12:58:33.11 |
-08:28:47.5 |
HIP 63362 |
16.86 |
| 2026-02-11 12:00 |
12:58:28.86 |
-08:28:16.6 |
HIP 63362 |
17.76 |
| 2026-02-12 00:00 |
12:58:24.53 |
-08:27:45.2 |
HIP 63362 |
18.70 |
| 2026-02-12 12:00 |
12:58:20.12 |
-08:27:13.3 |
HIP 63362 |
19.69 |
| 2026-02-13 00:00 |
12:58:15.65 |
-08:26:41.0 |
HIP 63362 |
20.72 |
| 2026-02-13 12:00 |
12:58:11.11 |
-08:26:08.2 |
HIP 63362 |
21.79 |
| 2026-02-14 00:00 |
12:58:06.49 |
-08:25:34.9 |
HIP 63362 |
22.89 |
| 2026-02-14 12:00 |
12:58:01.81 |
-08:25:01.1 |
HIP 63362 |
24.02 |
| 2026-02-15 00:00 |
12:57:57.05 |
-08:24:26.9 |
HIP 63362 |
25.18 |
| 2026-02-15 12:00 |
12:57:52.23 |
-08:23:52.2 |
HIP 63362 |
26.38 |
| 2026-02-16 00:00 |
12:57:47.34 |
-08:23:17.0 |
HIP 63362 |
27.60 |
| 2026-02-16 12:00 |
12:57:42.38 |
-08:22:41.4 |
HIP 63362 |
28.85 |
| 2026-02-17 00:00 |
12:57:37.35 |
-08:22:05.3 |
HIP 63362 |
30.13 |
| 2026-02-17 12:00 |
12:57:32.26 |
-08:21:28.7 |
HIP 63362 |
31.44 |
| 2026-02-18 00:00 |
12:57:27.10 |
-08:20:51.7 |
HIP 63362 |
32.77 |
| 2026-02-18 12:00 |
12:57:21.87 |
-08:20:14.2 |
HIP 63362 |
34.12 |
| 2026-02-19 00:00 |
12:57:16.58 |
-08:19:36.3 |
HIP 63088 |
34.67 |
| 2026-02-19 12:00 |
12:57:11.23 |
-08:18:57.9 |
HIP 63088 |
34.17 |
| 2026-02-20 00:00 |
12:57:05.81 |
-08:18:19.1 |
HIP 63088 |
33.73 |
| 2026-02-20 12:00 |
12:57:00.32 |
-08:17:39.8 |
HIP 63088 |
33.35 |
| 2026-02-21 00:00 |
12:56:54.78 |
-08:17:00.1 |
HIP 63088 |
33.02 |
| 2026-02-21 12:00 |
12:56:49.17 |
-08:16:20.0 |
HIP 63088 |
32.76 |
| 2026-02-22 00:00 |
12:56:43.50 |
-08:15:39.4 |
HIP 63088 |
32.57 |
| 2026-02-22 12:00 |
12:56:37.77 |
-08:14:58.4 |
HIP 63088 |
32.45 |
| 2026-02-23 00:00 |
12:56:31.98 |
-08:14:17.0 |
HIP 63088 |
32.41 |
| 2026-02-23 12:00 |
12:56:26.13 |
-08:13:35.2 |
HIP 63088 |
32.45 |
| 2026-02-24 00:00 |
12:56:20.22 |
-08:12:52.9 |
HIP 63088 |
32.56 |