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
$$
M_a = (-1.226 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-1.226 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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 |
+11.5399 |
-11.488 |
| 2020-12-18 |
2023-05-08 |
+6.3411 |
-6.559 |
| 2023-05-08 |
2025-05-02 |
-2.1501 |
+2.768 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
15:25:51.53 |
+18:41:32.5 |
HIP 75560 |
31.54 |
| 2026-09-20 12:00 |
15:25:57.65 |
+18:40:47.4 |
HIP 75560 |
30.64 |
| 2026-09-21 00:00 |
15:26:03.82 |
+18:40:02.6 |
HIP 75560 |
29.80 |
| 2026-09-21 12:00 |
15:26:10.04 |
+18:39:17.9 |
HIP 75560 |
29.03 |
| 2026-09-22 00:00 |
15:26:16.31 |
+18:38:33.4 |
HIP 75560 |
28.34 |
| 2026-09-22 12:00 |
15:26:22.63 |
+18:37:49.2 |
HIP 75560 |
27.74 |
| 2026-09-23 00:00 |
15:26:28.99 |
+18:37:05.1 |
HIP 75560 |
27.23 |
| 2026-09-23 12:00 |
15:26:35.41 |
+18:36:21.3 |
HIP 75560 |
26.83 |
| 2026-09-24 00:00 |
15:26:41.87 |
+18:35:37.7 |
HIP 75560 |
26.53 |
| 2026-09-24 12:00 |
15:26:48.38 |
+18:34:54.3 |
HIP 75560 |
26.35 |
| 2026-09-25 00:00 |
15:26:54.94 |
+18:34:11.2 |
HIP 75560 |
26.29 |
| 2026-09-25 12:00 |
15:27:01.54 |
+18:33:28.2 |
HIP 75560 |
26.35 |
| 2026-09-26 00:00 |
15:27:08.20 |
+18:32:45.6 |
HIP 75560 |
26.52 |
| 2026-09-26 12:00 |
15:27:14.89 |
+18:32:03.1 |
HIP 75560 |
26.82 |
| 2026-09-27 00:00 |
15:27:21.64 |
+18:31:20.9 |
HIP 75560 |
27.24 |
| 2026-09-27 12:00 |
15:27:28.43 |
+18:30:39.0 |
HIP 75560 |
27.77 |
| 2026-09-28 00:00 |
15:27:35.26 |
+18:29:57.3 |
HIP 75560 |
28.41 |
| 2026-09-28 12:00 |
15:27:42.14 |
+18:29:15.9 |
HIP 75560 |
29.16 |
| 2026-09-29 00:00 |
15:27:49.06 |
+18:28:34.7 |
HIP 75871 |
28.88 |
| 2026-09-29 12:00 |
15:27:56.03 |
+18:27:53.8 |
HIP 75871 |
27.27 |
| 2026-09-30 00:00 |
15:28:03.05 |
+18:27:13.2 |
HIP 75871 |
25.68 |
| 2026-09-30 12:00 |
15:28:10.10 |
+18:26:32.8 |
HIP 75871 |
24.10 |
| 2026-10-01 00:00 |
15:28:17.20 |
+18:25:52.7 |
HIP 75871 |
22.55 |
| 2026-10-01 12:00 |
15:28:24.34 |
+18:25:12.9 |
HIP 75871 |
21.03 |
| 2026-10-02 00:00 |
15:28:31.53 |
+18:24:33.4 |
HIP 75871 |
19.55 |
| 2026-10-02 12:00 |
15:28:38.76 |
+18:23:54.1 |
HIP 75871 |
18.12 |
| 2026-10-03 00:00 |
15:28:46.03 |
+18:23:15.2 |
HIP 75871 |
16.75 |
| 2026-10-03 12:00 |
15:28:53.34 |
+18:22:36.5 |
HIP 75871 |
15.48 |
| 2026-10-04 00:00 |
15:29:00.70 |
+18:21:58.1 |
HIP 75871 |
14.32 |
| 2026-10-04 12:00 |
15:29:08.09 |
+18:21:20.1 |
HIP 75871 |
13.31 |
| 2026-10-05 00:00 |
15:29:15.53 |
+18:20:42.3 |
HIP 75871 |
12.48 |
| 2026-10-05 12:00 |
15:29:23.00 |
+18:20:04.9 |
HIP 75871 |
11.89 |
| 2026-10-06 00:00 |
15:29:30.52 |
+18:19:27.8 |
HIP 75871 |
11.57 |
| 2026-10-06 12:00 |
15:29:38.08 |
+18:18:51.0 |
HIP 75871 |
11.54 |
| 2026-10-07 00:00 |
15:29:45.67 |
+18:18:14.5 |
HIP 75871 |
11.81 |
| 2026-10-07 12:00 |
15:29:53.31 |
+18:17:38.3 |
HIP 75871 |
12.37 |
| 2026-10-08 00:00 |
15:30:00.98 |
+18:17:02.5 |
HIP 75871 |
13.18 |
| 2026-10-08 12:00 |
15:30:08.69 |
+18:16:27.1 |
HIP 75871 |
14.20 |
| 2026-10-09 00:00 |
15:30:16.44 |
+18:15:51.9 |
HIP 75871 |
15.39 |
| 2026-10-09 12:00 |
15:30:24.23 |
+18:15:17.1 |
HIP 75871 |
16.72 |
| 2026-10-10 00:00 |
15:30:32.05 |
+18:14:42.7 |
HIP 75871 |
18.16 |
| 2026-10-10 12:00 |
15:30:39.91 |
+18:14:08.6 |
HIP 75871 |
19.68 |
| 2026-10-11 00:00 |
15:30:47.80 |
+18:13:34.9 |
HIP 75871 |
21.28 |