메타데이터
| 항목 |
값 |
| Designation |
P/2020 S1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-01-16T21:13:40.255680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:12Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
17.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-09-16T09:59:30.048000Z |
| Discovery magnitude (MPC) |
21.70 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-09-10.0000000 |
| e |
0.50722330 |
| q (au) |
2.947362 |
| a (au) |
5.981132 |
| i (deg) |
13.733881 |
| Ω (om, deg) |
129.458525 |
| ω (w, deg) |
254.866187 |
| M (ma, deg) |
351.315802 |
밝기
산란 + 전체 선형
$$
M_a = (16.347 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.347 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
12:41:27.40 |
+07:01:32.1 |
HIP 61968 |
15.07 |
| 2026-09-20 12:00 |
12:41:41.28 |
+07:00:03.2 |
HIP 61968 |
12.30 |
| 2026-09-21 00:00 |
12:41:55.18 |
+06:58:34.6 |
HIP 61968 |
10.19 |
| 2026-09-21 12:00 |
12:42:09.10 |
+06:57:06.1 |
HIP 61968 |
9.19 |
| 2026-09-22 00:00 |
12:42:23.03 |
+06:55:37.8 |
HIP 61968 |
9.67 |
| 2026-09-22 12:00 |
12:42:36.98 |
+06:54:09.6 |
HIP 61968 |
11.44 |
| 2026-09-23 00:00 |
12:42:50.94 |
+06:52:41.7 |
HIP 61968 |
14.02 |
| 2026-09-23 12:00 |
12:43:04.92 |
+06:51:13.9 |
HIP 61968 |
17.06 |
| 2026-09-24 00:00 |
12:43:18.91 |
+06:49:46.3 |
HIP 62156 |
15.27 |
| 2026-09-24 12:00 |
12:43:32.91 |
+06:48:18.9 |
HIP 62156 |
12.09 |
| 2026-09-25 00:00 |
12:43:46.93 |
+06:46:51.7 |
HIP 62156 |
9.36 |
| 2026-09-25 12:00 |
12:44:00.95 |
+06:45:24.7 |
HIP 62156 |
7.56 |
| 2026-09-26 00:00 |
12:44:14.99 |
+06:43:57.9 |
HIP 62156 |
7.43 |
| 2026-09-26 12:00 |
12:44:29.04 |
+06:42:31.3 |
HIP 62156 |
9.04 |
| 2026-09-27 00:00 |
12:44:43.10 |
+06:41:04.9 |
HIP 62156 |
11.69 |
| 2026-09-27 12:00 |
12:44:57.17 |
+06:39:38.7 |
HIP 62156 |
14.83 |
| 2026-09-28 00:00 |
12:45:11.25 |
+06:38:12.7 |
HIP 62156 |
18.22 |
| 2026-09-28 12:00 |
12:45:25.34 |
+06:36:47.0 |
HIP 62156 |
21.74 |
| 2026-09-29 00:00 |
12:45:39.44 |
+06:35:21.4 |
HIP 62231 |
22.00 |
| 2026-09-29 12:00 |
12:45:53.55 |
+06:33:56.1 |
HIP 62231 |
21.92 |
| 2026-09-30 00:00 |
12:46:07.66 |
+06:32:31.0 |
HIP 62231 |
22.49 |
| 2026-09-30 12:00 |
12:46:21.78 |
+06:31:06.2 |
HIP 62231 |
23.66 |
| 2026-10-01 00:00 |
12:46:35.91 |
+06:29:41.5 |
HIP 62404 |
24.54 |
| 2026-10-01 12:00 |
12:46:50.05 |
+06:28:17.2 |
HIP 62404 |
24.53 |
| 2026-10-02 00:00 |
12:47:04.19 |
+06:26:53.0 |
HIP 62404 |
25.09 |
| 2026-10-02 12:00 |
12:47:18.34 |
+06:25:29.1 |
HIP 62404 |
26.19 |
| 2026-10-03 00:00 |
12:47:32.49 |
+06:24:05.4 |
HIP 62404 |
27.76 |
| 2026-10-03 12:00 |
12:47:46.64 |
+06:22:42.0 |
HIP 62376 |
27.94 |
| 2026-10-04 00:00 |
12:48:00.80 |
+06:21:18.9 |
HIP 62376 |
28.31 |
| 2026-10-04 12:00 |
12:48:14.96 |
+06:19:56.0 |
HIP 62376 |
29.17 |
| 2026-10-05 00:00 |
12:48:29.13 |
+06:18:33.4 |
HIP 62660 |
28.11 |
| 2026-10-05 12:00 |
12:48:43.30 |
+06:17:11.0 |
HIP 62660 |
24.42 |
| 2026-10-06 00:00 |
12:48:57.47 |
+06:15:48.9 |
HIP 62660 |
20.75 |
| 2026-10-06 12:00 |
12:49:11.64 |
+06:14:27.1 |
HIP 62660 |
17.14 |
| 2026-10-07 00:00 |
12:49:25.81 |
+06:13:05.6 |
HIP 62660 |
13.61 |
| 2026-10-07 12:00 |
12:49:39.98 |
+06:11:44.3 |
HIP 62660 |
10.25 |
| 2026-10-08 00:00 |
12:49:54.15 |
+06:10:23.4 |
HIP 62660 |
7.31 |
| 2026-10-08 12:00 |
12:50:08.32 |
+06:09:02.7 |
HIP 62660 |
5.50 |
| 2026-10-09 00:00 |
12:50:22.49 |
+06:07:42.3 |
HIP 62660 |
5.95 |
| 2026-10-09 12:00 |
12:50:36.65 |
+06:06:22.3 |
HIP 62660 |
8.30 |
| 2026-10-10 00:00 |
12:50:50.82 |
+06:05:02.5 |
HIP 62702 |
10.98 |
| 2026-10-10 12:00 |
12:51:04.97 |
+06:03:43.1 |
HIP 62702 |
12.43 |
| 2026-10-11 00:00 |
12:51:19.13 |
+06:02:23.9 |
HIP 62702 |
14.71 |