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) |
| 2026-06-01 00:00 |
12:12:23.82 |
+11:35:36.5 |
HIP 59592 |
13.15 |
| 2026-06-01 12:00 |
12:12:22.12 |
+11:35:11.2 |
HIP 59592 |
13.40 |
| 2026-06-02 00:00 |
12:12:20.53 |
+11:34:45.1 |
HIP 59592 |
13.65 |
| 2026-06-02 12:00 |
12:12:19.04 |
+11:34:18.3 |
HIP 59592 |
13.89 |
| 2026-06-03 00:00 |
12:12:17.67 |
+11:33:50.8 |
HIP 59592 |
14.11 |
| 2026-06-03 12:00 |
12:12:16.39 |
+11:33:22.5 |
HIP 59592 |
14.33 |
| 2026-06-04 00:00 |
12:12:15.23 |
+11:32:53.5 |
HIP 59592 |
14.54 |
| 2026-06-04 12:00 |
12:12:14.17 |
+11:32:23.8 |
HIP 59592 |
14.74 |
| 2026-06-05 00:00 |
12:12:13.22 |
+11:31:53.3 |
HIP 59480 |
14.79 |
| 2026-06-05 12:00 |
12:12:12.38 |
+11:31:22.2 |
HIP 59480 |
14.24 |
| 2026-06-06 00:00 |
12:12:11.64 |
+11:30:50.3 |
HIP 59480 |
13.68 |
| 2026-06-06 12:00 |
12:12:11.01 |
+11:30:17.7 |
HIP 59480 |
13.11 |
| 2026-06-07 00:00 |
12:12:10.49 |
+11:29:44.4 |
HIP 59480 |
12.54 |
| 2026-06-07 12:00 |
12:12:10.07 |
+11:29:10.3 |
HIP 59480 |
11.97 |
| 2026-06-08 00:00 |
12:12:09.76 |
+11:28:35.6 |
HIP 59480 |
11.39 |
| 2026-06-08 12:00 |
12:12:09.56 |
+11:28:00.2 |
HIP 59480 |
10.80 |
| 2026-06-09 00:00 |
12:12:09.46 |
+11:27:24.1 |
HIP 59480 |
10.21 |
| 2026-06-09 12:00 |
12:12:09.47 |
+11:26:47.2 |
HIP 59480 |
9.62 |
| 2026-06-10 00:00 |
12:12:09.59 |
+11:26:09.7 |
HIP 59480 |
9.03 |
| 2026-06-10 12:00 |
12:12:09.82 |
+11:25:31.5 |
HIP 59480 |
8.44 |
| 2026-06-11 00:00 |
12:12:10.15 |
+11:24:52.7 |
HIP 59480 |
7.86 |
| 2026-06-11 12:00 |
12:12:10.58 |
+11:24:13.1 |
HIP 59480 |
7.29 |
| 2026-06-12 00:00 |
12:12:11.13 |
+11:23:32.9 |
HIP 59480 |
6.74 |
| 2026-06-12 12:00 |
12:12:11.78 |
+11:22:52.0 |
HIP 59480 |
6.22 |
| 2026-06-13 00:00 |
12:12:12.54 |
+11:22:10.4 |
HIP 59480 |
5.74 |
| 2026-06-13 12:00 |
12:12:13.40 |
+11:21:28.1 |
HIP 59480 |
5.33 |
| 2026-06-14 00:00 |
12:12:14.37 |
+11:20:45.2 |
HIP 59480 |
5.00 |
| 2026-06-14 12:00 |
12:12:15.44 |
+11:20:01.7 |
HIP 59480 |
4.79 |
| 2026-06-15 00:00 |
12:12:16.62 |
+11:19:17.4 |
HIP 59480 |
4.72 |
| 2026-06-15 12:00 |
12:12:17.91 |
+11:18:32.6 |
HIP 59480 |
4.80 |
| 2026-06-16 00:00 |
12:12:19.30 |
+11:17:47.1 |
HIP 59480 |
5.04 |
| 2026-06-16 12:00 |
12:12:20.80 |
+11:17:00.9 |
HIP 59480 |
5.43 |
| 2026-06-17 00:00 |
12:12:22.40 |
+11:16:14.2 |
HIP 59480 |
5.94 |
| 2026-06-17 12:00 |
12:12:24.11 |
+11:15:26.8 |
HIP 59480 |
6.56 |
| 2026-06-18 00:00 |
12:12:25.92 |
+11:14:38.7 |
HIP 59480 |
7.26 |
| 2026-06-18 12:00 |
12:12:27.84 |
+11:13:50.1 |
HIP 59480 |
8.03 |
| 2026-06-19 00:00 |
12:12:29.86 |
+11:13:00.8 |
HIP 59549 |
7.54 |
| 2026-06-19 12:00 |
12:12:31.98 |
+11:12:10.9 |
HIP 59549 |
6.56 |
| 2026-06-20 00:00 |
12:12:34.21 |
+11:11:20.5 |
HIP 59549 |
5.56 |
| 2026-06-20 12:00 |
12:12:36.54 |
+11:10:29.4 |
HIP 59549 |
4.54 |
| 2026-06-21 00:00 |
12:12:38.97 |
+11:09:37.7 |
HIP 59549 |
3.49 |
| 2026-06-21 12:00 |
12:12:41.51 |
+11:08:45.4 |
HIP 59549 |
2.42 |
| 2026-06-22 00:00 |
12:12:44.14 |
+11:07:52.6 |
HIP 59549 |
1.34 |