메타데이터
| 항목 |
값 |
| Designation |
C/2020 H8 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-06-04T04:42:35.982720Z |
| Orbit solution date (soln_date, UTC) |
2021-07-01T22:12:48Z |
| Obs used |
199 |
| NEO |
- |
| M1 |
11.100 |
| K1 |
9.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-04-30T13:50:29.990400Z |
| Discovery magnitude (MPC) |
20.79 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-06-24.0000000 |
| e |
0.99237509 |
| q (au) |
4.674530 |
| a (au) |
613.060227 |
| i (deg) |
99.646917 |
| Ω (om, deg) |
68.406554 |
| ω (w, deg) |
128.895525 |
| M (ma, deg) |
0.001286 |
밝기
산란 + 전체 선형
$$
M_a = (9.230 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.230 |
| n |
6.000 |
| gf |
0.973 |
| gb |
-0.700 |
| k |
0.827 |
| δ90 |
9.999 |
| 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) |
| 2026-03-26 00:00 |
12:16:03.63 |
-75:14:38.4 |
HIP 59605 |
10.16 |
| 2026-03-26 12:00 |
12:15:27.95 |
-75:14:30.4 |
HIP 59605 |
7.88 |
| 2026-03-27 00:00 |
12:14:52.27 |
-75:14:21.1 |
HIP 59605 |
5.60 |
| 2026-03-27 12:00 |
12:14:16.62 |
-75:14:10.4 |
HIP 59605 |
3.33 |
| 2026-03-28 00:00 |
12:13:40.99 |
-75:13:58.4 |
HIP 59605 |
1.08 |
| 2026-03-28 12:00 |
12:13:05.39 |
-75:13:45.1 |
HIP 59605 |
1.28 |
| 2026-03-29 00:00 |
12:12:29.83 |
-75:13:30.4 |
HIP 59605 |
3.54 |
| 2026-03-29 12:00 |
12:11:54.30 |
-75:13:14.3 |
HIP 59605 |
5.82 |
| 2026-03-30 00:00 |
12:11:18.82 |
-75:12:56.9 |
HIP 59605 |
8.10 |
| 2026-03-30 12:00 |
12:10:43.39 |
-75:12:38.2 |
HIP 59605 |
10.38 |
| 2026-03-31 00:00 |
12:10:08.00 |
-75:12:18.2 |
HIP 59605 |
12.66 |
| 2026-03-31 12:00 |
12:09:32.68 |
-75:11:56.8 |
HIP 59151 |
12.00 |
| 2026-04-01 00:00 |
12:08:57.42 |
-75:11:34.1 |
HIP 59151 |
11.30 |
| 2026-04-01 12:00 |
12:08:22.22 |
-75:11:10.1 |
HIP 59151 |
11.05 |
| 2026-04-02 00:00 |
12:07:47.09 |
-75:10:44.8 |
HIP 59151 |
11.28 |
| 2026-04-02 12:00 |
12:07:12.04 |
-75:10:18.2 |
HIP 59151 |
11.97 |
| 2026-04-03 00:00 |
12:06:37.07 |
-75:09:50.3 |
HIP 59151 |
13.04 |
| 2026-04-03 12:00 |
12:06:02.18 |
-75:09:21.1 |
HIP 59151 |
14.41 |
| 2026-04-04 00:00 |
12:05:27.37 |
-75:08:50.5 |
HIP 59151 |
16.01 |
| 2026-04-04 12:00 |
12:04:52.66 |
-75:08:18.7 |
HIP 59151 |
17.76 |
| 2026-04-05 00:00 |
12:04:18.05 |
-75:07:45.6 |
HIP 59151 |
19.64 |
| 2026-04-05 12:00 |
12:03:43.54 |
-75:07:11.2 |
HIP 58717 |
20.95 |
| 2026-04-06 00:00 |
12:03:09.13 |
-75:06:35.6 |
HIP 58717 |
20.01 |
| 2026-04-06 12:00 |
12:02:34.83 |
-75:05:58.7 |
HIP 58717 |
19.28 |
| 2026-04-07 00:00 |
12:02:00.65 |
-75:05:20.5 |
HIP 58717 |
18.79 |
| 2026-04-07 12:00 |
12:01:26.58 |
-75:04:41.0 |
HIP 58717 |
18.55 |
| 2026-04-08 00:00 |
12:00:52.63 |
-75:04:00.3 |
HIP 58717 |
18.58 |
| 2026-04-08 12:00 |
12:00:18.81 |
-75:03:18.4 |
HIP 58717 |
18.87 |
| 2026-04-09 00:00 |
11:59:45.12 |
-75:02:35.2 |
HIP 58717 |
19.42 |
| 2026-04-09 12:00 |
11:59:11.56 |
-75:01:50.8 |
HIP 58717 |
20.19 |
| 2026-04-10 00:00 |
11:58:38.14 |
-75:01:05.2 |
HIP 58717 |
21.17 |
| 2026-04-10 12:00 |
11:58:04.86 |
-75:00:18.3 |
HIP 58717 |
22.33 |
| 2026-04-11 00:00 |
11:57:31.73 |
-74:59:30.2 |
HIP 58339 |
23.15 |
| 2026-04-11 12:00 |
11:56:58.75 |
-74:58:40.9 |
HIP 58339 |
24.16 |
| 2026-04-12 00:00 |
11:56:25.91 |
-74:57:50.5 |
HIP 58339 |
25.35 |
| 2026-04-12 12:00 |
11:55:53.24 |
-74:56:58.8 |
HIP 57965 |
26.54 |
| 2026-04-13 00:00 |
11:55:20.72 |
-74:56:06.0 |
HIP 57965 |
24.98 |
| 2026-04-13 12:00 |
11:54:48.37 |
-74:55:11.9 |
HIP 57965 |
23.52 |
| 2026-04-14 00:00 |
11:54:16.19 |
-74:54:16.8 |
HIP 57965 |
22.19 |
| 2026-04-14 12:00 |
11:53:44.18 |
-74:53:20.4 |
HIP 57965 |
21.02 |
| 2026-04-15 00:00 |
11:53:12.34 |
-74:52:22.9 |
HIP 57965 |
20.02 |
| 2026-04-15 12:00 |
11:52:40.68 |
-74:51:24.3 |
HIP 57965 |
19.23 |
| 2026-04-16 00:00 |
11:52:09.20 |
-74:50:24.6 |
HIP 57965 |
18.66 |