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
$$
M_a = (9.171 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.171 |
| n |
6.000 |
| gf |
0.970 |
| gb |
-0.701 |
| k |
0.837 |
| 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) |
| 2026-06-01 00:00 |
11:20:46.57 |
-72:24:04.8 |
HIP 55657 |
17.79 |
| 2026-06-01 12:00 |
11:20:37.81 |
-72:22:11.4 |
HIP 55657 |
17.57 |
| 2026-06-02 00:00 |
11:20:29.29 |
-72:20:18.0 |
HIP 55657 |
17.57 |
| 2026-06-02 12:00 |
11:20:21.01 |
-72:18:24.6 |
HIP 55657 |
17.77 |
| 2026-06-03 00:00 |
11:20:12.96 |
-72:16:31.1 |
HIP 55350 |
16.87 |
| 2026-06-03 12:00 |
11:20:05.14 |
-72:14:37.7 |
HIP 55350 |
14.97 |
| 2026-06-04 00:00 |
11:19:57.55 |
-72:12:44.3 |
HIP 55350 |
13.09 |
| 2026-06-04 12:00 |
11:19:50.19 |
-72:10:50.9 |
HIP 55350 |
11.24 |
| 2026-06-05 00:00 |
11:19:43.06 |
-72:08:57.6 |
HIP 55350 |
9.44 |
| 2026-06-05 12:00 |
11:19:36.15 |
-72:07:04.3 |
HIP 55350 |
7.72 |
| 2026-06-06 00:00 |
11:19:29.48 |
-72:05:11.1 |
HIP 55350 |
6.14 |
| 2026-06-06 12:00 |
11:19:23.03 |
-72:03:18.0 |
HIP 55350 |
4.83 |
| 2026-06-07 00:00 |
11:19:16.80 |
-72:01:24.9 |
HIP 55350 |
4.06 |
| 2026-06-07 12:00 |
11:19:10.80 |
-71:59:32.0 |
HIP 55350 |
4.13 |
| 2026-06-08 00:00 |
11:19:05.02 |
-71:57:39.1 |
HIP 55350 |
5.00 |
| 2026-06-08 12:00 |
11:18:59.46 |
-71:55:46.3 |
HIP 55350 |
6.34 |
| 2026-06-09 00:00 |
11:18:54.11 |
-71:53:53.7 |
HIP 55350 |
7.92 |
| 2026-06-09 12:00 |
11:18:48.99 |
-71:52:01.2 |
HIP 55350 |
9.61 |
| 2026-06-10 00:00 |
11:18:44.09 |
-71:50:08.9 |
HIP 55350 |
11.36 |
| 2026-06-10 12:00 |
11:18:39.40 |
-71:48:16.7 |
HIP 55350 |
13.15 |
| 2026-06-11 00:00 |
11:18:34.93 |
-71:46:24.6 |
HIP 55457 |
13.50 |
| 2026-06-11 12:00 |
11:18:30.67 |
-71:44:32.7 |
HIP 55457 |
14.07 |
| 2026-06-12 00:00 |
11:18:26.62 |
-71:42:41.0 |
HIP 55457 |
14.85 |
| 2026-06-12 12:00 |
11:18:22.79 |
-71:40:49.5 |
HIP 55457 |
15.79 |
| 2026-06-13 00:00 |
11:18:19.16 |
-71:38:58.2 |
HIP 55457 |
16.88 |
| 2026-06-13 12:00 |
11:18:15.74 |
-71:37:07.2 |
HIP 55457 |
18.09 |
| 2026-06-14 00:00 |
11:18:12.54 |
-71:35:16.3 |
HIP 55457 |
19.38 |
| 2026-06-14 12:00 |
11:18:09.54 |
-71:33:25.6 |
HIP 55457 |
20.75 |
| 2026-06-15 00:00 |
11:18:06.74 |
-71:31:35.2 |
HIP 55457 |
22.18 |
| 2026-06-15 12:00 |
11:18:04.15 |
-71:29:45.1 |
HIP 55457 |
23.65 |
| 2026-06-16 00:00 |
11:18:01.76 |
-71:27:55.2 |
HIP 55457 |
25.16 |
| 2026-06-16 12:00 |
11:17:59.57 |
-71:26:05.6 |
HIP 55457 |
26.69 |
| 2026-06-17 00:00 |
11:17:57.58 |
-71:24:16.2 |
HIP 55169 |
25.65 |
| 2026-06-17 12:00 |
11:17:55.79 |
-71:22:27.2 |
HIP 55169 |
23.83 |
| 2026-06-18 00:00 |
11:17:54.20 |
-71:20:38.4 |
HIP 55169 |
22.01 |
| 2026-06-18 12:00 |
11:17:52.80 |
-71:18:50.0 |
HIP 55169 |
20.20 |
| 2026-06-19 00:00 |
11:17:51.59 |
-71:17:01.8 |
HIP 55169 |
18.39 |
| 2026-06-19 12:00 |
11:17:50.58 |
-71:15:14.0 |
HIP 55169 |
16.60 |
| 2026-06-20 00:00 |
11:17:49.76 |
-71:13:26.5 |
HIP 55169 |
14.80 |
| 2026-06-20 12:00 |
11:17:49.13 |
-71:11:39.4 |
HIP 55169 |
13.02 |
| 2026-06-21 00:00 |
11:17:48.68 |
-71:09:52.6 |
HIP 55169 |
11.24 |
| 2026-06-21 12:00 |
11:17:48.42 |
-71:08:06.2 |
HIP 55169 |
9.46 |
| 2026-06-22 00:00 |
11:17:48.35 |
-71:06:20.1 |
HIP 55169 |
7.70 |