메타데이터
| 항목 |
값 |
| Designation |
P/2020 O3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-01-27T20:38:44.139840Z |
| Orbit solution date (soln_date, UTC) |
2023-02-06T22:13:22Z |
| Obs used |
71 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-07-28T12:07:34.118400Z |
| Discovery magnitude (MPC) |
21.08 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-08-19.0000000 |
| e |
0.10611991 |
| q (au) |
4.167207 |
| a (au) |
4.661931 |
| i (deg) |
8.442690 |
| Ω (om, deg) |
266.895744 |
| ω (w, deg) |
81.214576 |
| M (ma, deg) |
344.151234 |
밝기
산란 + 전체 선형
$$
M_a = (15.241 + 2.001\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.241 |
| n |
2.001 |
| gf |
0.901 |
| 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) |
| 2026-09-20 00:00 |
12:08:34.91 |
-08:31:03.9 |
HIP 59149 |
11.95 |
| 2026-09-20 12:00 |
12:09:00.53 |
-08:33:41.7 |
HIP 59283 |
9.60 |
| 2026-09-21 00:00 |
12:09:26.15 |
-08:36:19.7 |
HIP 59283 |
4.27 |
| 2026-09-21 12:00 |
12:09:51.79 |
-08:38:58.0 |
HIP 59283 |
6.20 |
| 2026-09-22 00:00 |
12:10:17.44 |
-08:41:36.5 |
HIP 59283 |
12.37 |
| 2026-09-22 12:00 |
12:10:43.09 |
-08:44:15.3 |
HIP 59283 |
19.03 |
| 2026-09-23 00:00 |
12:11:08.76 |
-08:46:54.4 |
HIP 59283 |
25.80 |
| 2026-09-23 12:00 |
12:11:34.44 |
-08:49:33.7 |
HIP 59600 |
30.34 |
| 2026-09-24 00:00 |
12:12:00.13 |
-08:52:13.2 |
HIP 59600 |
23.53 |
| 2026-09-24 12:00 |
12:12:25.82 |
-08:54:52.9 |
HIP 59600 |
16.78 |
| 2026-09-25 00:00 |
12:12:51.53 |
-08:57:32.9 |
HIP 59600 |
10.21 |
| 2026-09-25 12:00 |
12:13:17.24 |
-09:00:13.1 |
HIP 59600 |
4.64 |
| 2026-09-26 00:00 |
12:13:42.96 |
-09:02:53.5 |
HIP 59600 |
5.81 |
| 2026-09-26 12:00 |
12:14:08.68 |
-09:05:34.1 |
HIP 59702 |
9.47 |
| 2026-09-27 00:00 |
12:14:34.41 |
-09:08:14.9 |
HIP 59702 |
8.88 |
| 2026-09-27 12:00 |
12:15:00.15 |
-09:10:56.0 |
HIP 59702 |
12.79 |
| 2026-09-28 00:00 |
12:15:25.90 |
-09:13:37.2 |
HIP 59702 |
18.53 |
| 2026-09-28 12:00 |
12:15:51.64 |
-09:16:18.7 |
HIP 59702 |
24.87 |
| 2026-09-29 00:00 |
12:16:17.40 |
-09:19:00.4 |
HIP 59702 |
31.45 |
| 2026-09-29 12:00 |
12:16:43.16 |
-09:21:42.2 |
HIP 59702 |
38.14 |
| 2026-09-30 00:00 |
12:17:08.92 |
-09:24:24.3 |
HIP 60019 |
36.48 |
| 2026-09-30 12:00 |
12:17:34.68 |
-09:27:06.5 |
HIP 60019 |
35.78 |
| 2026-10-01 00:00 |
12:18:00.45 |
-09:29:48.9 |
HIP 60019 |
36.41 |
| 2026-10-01 12:00 |
12:18:26.22 |
-09:32:31.5 |
HIP 60019 |
38.30 |
| 2026-10-02 00:00 |
12:18:51.99 |
-09:35:14.3 |
HIP 60248 |
34.93 |
| 2026-10-02 12:00 |
12:19:17.77 |
-09:37:57.2 |
HIP 60248 |
28.94 |
| 2026-10-03 00:00 |
12:19:43.54 |
-09:40:40.4 |
HIP 60248 |
23.45 |
| 2026-10-03 12:00 |
12:20:09.32 |
-09:43:23.6 |
HIP 60248 |
18.93 |
| 2026-10-04 00:00 |
12:20:35.10 |
-09:46:07.1 |
HIP 60248 |
16.20 |
| 2026-10-04 12:00 |
12:21:00.87 |
-09:48:50.7 |
HIP 60248 |
16.19 |
| 2026-10-05 00:00 |
12:21:26.65 |
-09:51:34.5 |
HIP 60248 |
18.90 |
| 2026-10-05 12:00 |
12:21:52.42 |
-09:54:18.4 |
HIP 60420 |
22.18 |
| 2026-10-06 00:00 |
12:22:18.19 |
-09:57:02.4 |
HIP 60420 |
17.92 |
| 2026-10-06 12:00 |
12:22:43.96 |
-09:59:46.6 |
HIP 60420 |
15.69 |
| 2026-10-07 00:00 |
12:23:09.72 |
-10:02:31.0 |
HIP 60420 |
16.33 |
| 2026-10-07 12:00 |
12:23:35.48 |
-10:05:15.4 |
HIP 60420 |
19.56 |
| 2026-10-08 00:00 |
12:24:01.23 |
-10:08:00.0 |
HIP 60518 |
21.12 |
| 2026-10-08 12:00 |
12:24:26.98 |
-10:10:44.7 |
HIP 60518 |
17.82 |
| 2026-10-09 00:00 |
12:24:52.73 |
-10:13:29.5 |
HIP 60634 |
15.35 |
| 2026-10-09 12:00 |
12:25:18.46 |
-10:16:14.5 |
HIP 60634 |
14.55 |
| 2026-10-10 00:00 |
12:25:44.19 |
-10:18:59.5 |
HIP 60634 |
16.83 |
| 2026-10-10 12:00 |
12:26:09.91 |
-10:21:44.7 |
HIP 60634 |
21.22 |
| 2026-10-11 00:00 |
12:26:35.63 |
-10:24:29.9 |
HIP 60812 |
23.51 |