메타데이터
| 항목 |
값 |
| Designation |
C/2020 H5 (Robinson) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-12-11T22:51:25.208640Z |
| Orbit solution date (soln_date, UTC) |
2025-05-08T09:42:16Z |
| Obs used |
292 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
8.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-04-22T07:56:03.321600Z |
| Discovery magnitude (MPC) |
19.18 c |
| Discovery observatory (MPC) |
T05 · ATLAS-HKO, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-11-15.0000000 |
| e |
0.99727266 |
| q (au) |
9.345056 |
| a (au) |
3426.435895 |
| i (deg) |
70.232252 |
| Ω (om, deg) |
210.630689 |
| ω (w, deg) |
326.402295 |
| M (ma, deg) |
0.001661 |
밝기
산란 + 전체 선형
$$
M_a = (-1.200 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-1.200 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2015-12-14 |
2020-11-22 |
+11.5591 |
-11.528 |
| 2020-12-18 |
2023-05-08 |
+14.7277 |
-14.765 |
| 2023-05-08 |
2025-05-02 |
-3.8779 |
+4.668 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
15:33:13.59 |
+19:48:21.5 |
HIP 76118 |
7.06 |
| 2026-05-12 12:00 |
15:33:06.47 |
+19:49:22.2 |
HIP 76118 |
6.42 |
| 2026-05-13 00:00 |
15:32:59.35 |
+19:50:22.2 |
HIP 76118 |
6.34 |
| 2026-05-13 12:00 |
15:32:52.22 |
+19:51:21.5 |
HIP 76118 |
6.82 |
| 2026-05-14 00:00 |
15:32:45.09 |
+19:52:20.0 |
HIP 76118 |
7.76 |
| 2026-05-14 12:00 |
15:32:37.95 |
+19:53:17.8 |
HIP 76118 |
9.02 |
| 2026-05-15 00:00 |
15:32:30.82 |
+19:54:14.8 |
HIP 76118 |
10.47 |
| 2026-05-15 12:00 |
15:32:23.68 |
+19:55:11.1 |
HIP 76118 |
12.05 |
| 2026-05-16 00:00 |
15:32:16.55 |
+19:56:06.6 |
HIP 76118 |
13.70 |
| 2026-05-16 12:00 |
15:32:09.41 |
+19:57:01.4 |
HIP 76118 |
15.41 |
| 2026-05-17 00:00 |
15:32:02.28 |
+19:57:55.5 |
HIP 76118 |
17.15 |
| 2026-05-17 12:00 |
15:31:55.15 |
+19:58:48.8 |
HIP 76118 |
18.91 |
| 2026-05-18 00:00 |
15:31:48.03 |
+19:59:41.3 |
HIP 76118 |
20.68 |
| 2026-05-18 12:00 |
15:31:40.90 |
+20:00:33.1 |
HIP 76039 |
22.12 |
| 2026-05-19 00:00 |
15:31:33.79 |
+20:01:24.1 |
HIP 76039 |
21.42 |
| 2026-05-19 12:00 |
15:31:26.67 |
+20:02:14.4 |
HIP 76039 |
20.87 |
| 2026-05-20 00:00 |
15:31:19.57 |
+20:03:03.9 |
HIP 76039 |
20.49 |
| 2026-05-20 12:00 |
15:31:12.47 |
+20:03:52.7 |
HIP 76039 |
20.29 |
| 2026-05-21 00:00 |
15:31:05.38 |
+20:04:40.7 |
HIP 76039 |
20.27 |
| 2026-05-21 12:00 |
15:30:58.30 |
+20:05:27.9 |
HIP 76039 |
20.42 |
| 2026-05-22 00:00 |
15:30:51.24 |
+20:06:14.4 |
HIP 76039 |
20.74 |
| 2026-05-22 12:00 |
15:30:44.18 |
+20:07:00.1 |
HIP 76039 |
21.23 |
| 2026-05-23 00:00 |
15:30:37.13 |
+20:07:45.0 |
HIP 76039 |
21.86 |
| 2026-05-23 12:00 |
15:30:30.09 |
+20:08:29.2 |
HIP 76039 |
22.63 |
| 2026-05-24 00:00 |
15:30:23.07 |
+20:09:12.6 |
HIP 76039 |
23.51 |
| 2026-05-24 12:00 |
15:30:16.06 |
+20:09:55.2 |
HIP 76039 |
24.50 |
| 2026-05-25 00:00 |
15:30:09.07 |
+20:10:37.1 |
HIP 76039 |
25.58 |
| 2026-05-25 12:00 |
15:30:02.09 |
+20:11:18.2 |
HIP 76039 |
26.74 |
| 2026-05-26 00:00 |
15:29:55.12 |
+20:11:58.6 |
HIP 76039 |
27.96 |
| 2026-05-26 12:00 |
15:29:48.18 |
+20:12:38.2 |
HIP 76039 |
29.24 |
| 2026-05-27 00:00 |
15:29:41.25 |
+20:13:17.0 |
HIP 76039 |
30.57 |
| 2026-05-27 12:00 |
15:29:34.33 |
+20:13:55.1 |
HIP 76039 |
31.93 |
| 2026-05-28 00:00 |
15:29:27.44 |
+20:14:32.4 |
HIP 75660 |
30.83 |
| 2026-05-28 12:00 |
15:29:20.57 |
+20:15:08.9 |
HIP 75660 |
29.11 |
| 2026-05-29 00:00 |
15:29:13.71 |
+20:15:44.7 |
HIP 75660 |
27.41 |
| 2026-05-29 12:00 |
15:29:06.88 |
+20:16:19.7 |
HIP 75660 |
25.71 |
| 2026-05-30 00:00 |
15:29:00.06 |
+20:16:54.0 |
HIP 75660 |
24.03 |
| 2026-05-30 12:00 |
15:28:53.27 |
+20:17:27.5 |
HIP 75660 |
22.36 |
| 2026-05-31 00:00 |
15:28:46.50 |
+20:18:00.2 |
HIP 75660 |
20.71 |
| 2026-05-31 12:00 |
15:28:39.76 |
+20:18:32.2 |
HIP 75660 |
19.07 |
| 2026-06-01 00:00 |
15:28:33.04 |
+20:19:03.4 |
HIP 75660 |
17.44 |
| 2026-06-01 12:00 |
15:28:26.34 |
+20:19:33.8 |
HIP 75660 |
15.84 |
| 2026-06-02 00:00 |
15:28:19.67 |
+20:20:03.5 |
HIP 75660 |
14.26 |