C/2020 B3 (Rankin)
메타데이터
| 항목 |
값 |
| Designation |
C/2020 B3 (Rankin) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-10-19T21:22:57Z |
| Orbit solution date (soln_date, UTC) |
2022-07-06T03:12:24Z |
| Obs used |
185 |
| NEO |
- |
| M1 |
14.600 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-03-13.0000000 |
| e |
0.99826805 |
| q (au) |
3.344460 |
| a (au) |
1931.033136 |
| i (deg) |
20.701635 |
| Ω (om, deg) |
185.824602 |
| ω (w, deg) |
325.092308 |
| M (ma, deg) |
0.001685 |
밝기
산란 + 전체 선형
$$
M_a = (16.046 + 2.957\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.046 |
| n |
2.957 |
| gf |
1.000 |
| gb |
-0.768 |
| k |
0.800 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
18:35:59.38 |
-03:23:30.8 |
HIP 91226 |
20.65 |
| 2026-02-03 12:00 |
18:36:06.08 |
-03:23:04.2 |
HIP 91226 |
19.61 |
| 2026-02-04 00:00 |
18:36:12.75 |
-03:22:37.3 |
HIP 91226 |
18.67 |
| 2026-02-04 12:00 |
18:36:19.38 |
-03:22:10.2 |
HIP 91226 |
17.84 |
| 2026-02-05 00:00 |
18:36:25.98 |
-03:21:42.9 |
HIP 91226 |
17.15 |
| 2026-02-05 12:00 |
18:36:32.54 |
-03:21:15.4 |
HIP 91226 |
16.60 |
| 2026-02-06 00:00 |
18:36:39.07 |
-03:20:47.7 |
HIP 91226 |
16.20 |
| 2026-02-06 12:00 |
18:36:45.56 |
-03:20:19.7 |
HIP 91226 |
15.97 |
| 2026-02-07 00:00 |
18:36:52.01 |
-03:19:51.5 |
HIP 91226 |
15.91 |
| 2026-02-07 12:00 |
18:36:58.43 |
-03:19:23.1 |
HIP 91226 |
16.02 |
| 2026-02-08 00:00 |
18:37:04.81 |
-03:18:54.5 |
HIP 91226 |
16.30 |
| 2026-02-08 12:00 |
18:37:11.16 |
-03:18:25.6 |
HIP 91226 |
16.73 |
| 2026-02-09 00:00 |
18:37:17.46 |
-03:17:56.6 |
HIP 91226 |
17.29 |
| 2026-02-09 12:00 |
18:37:23.73 |
-03:17:27.4 |
HIP 91394 |
16.09 |
| 2026-02-10 00:00 |
18:37:29.96 |
-03:16:57.9 |
HIP 91394 |
14.46 |
| 2026-02-10 12:00 |
18:37:36.15 |
-03:16:28.2 |
HIP 91394 |
12.84 |
| 2026-02-11 00:00 |
18:37:42.30 |
-03:15:58.4 |
HIP 91394 |
11.23 |
| 2026-02-11 12:00 |
18:37:48.41 |
-03:15:28.3 |
HIP 91394 |
9.63 |
| 2026-02-12 00:00 |
18:37:54.48 |
-03:14:58.0 |
HIP 91394 |
8.05 |
| 2026-02-12 12:00 |
18:38:00.51 |
-03:14:27.6 |
HIP 91394 |
6.47 |
| 2026-02-13 00:00 |
18:38:06.50 |
-03:13:56.9 |
HIP 91394 |
4.90 |
| 2026-02-13 12:00 |
18:38:12.45 |
-03:13:26.1 |
HIP 91394 |
3.36 |
| 2026-02-14 00:00 |
18:38:18.35 |
-03:12:55.0 |
HIP 91394 |
1.88 |
| 2026-02-14 12:00 |
18:38:24.22 |
-03:12:23.8 |
HIP 91394 |
0.78 |
| 2026-02-15 00:00 |
18:38:30.04 |
-03:11:52.4 |
HIP 91394 |
1.58 |
| 2026-02-15 12:00 |
18:38:35.82 |
-03:11:20.8 |
HIP 91394 |
3.01 |
| 2026-02-16 00:00 |
18:38:41.56 |
-03:10:49.0 |
HIP 91394 |
4.51 |
| 2026-02-16 12:00 |
18:38:47.25 |
-03:10:17.0 |
HIP 91394 |
6.01 |
| 2026-02-17 00:00 |
18:38:52.90 |
-03:09:44.9 |
HIP 91394 |
7.50 |
| 2026-02-17 12:00 |
18:38:58.51 |
-03:09:12.5 |
HIP 91394 |
8.99 |
| 2026-02-18 00:00 |
18:39:04.07 |
-03:08:40.0 |
HIP 91394 |
10.48 |
| 2026-02-18 12:00 |
18:39:09.58 |
-03:08:07.4 |
HIP 91394 |
11.95 |
| 2026-02-19 00:00 |
18:39:15.06 |
-03:07:34.5 |
HIP 91394 |
13.42 |
| 2026-02-19 12:00 |
18:39:20.48 |
-03:07:01.5 |
HIP 91394 |
14.88 |
| 2026-02-20 00:00 |
18:39:25.86 |
-03:06:28.3 |
HIP 91394 |
16.33 |
| 2026-02-20 12:00 |
18:39:31.20 |
-03:05:55.0 |
HIP 91394 |
17.77 |
| 2026-02-21 00:00 |
18:39:36.48 |
-03:05:21.5 |
HIP 91394 |
19.20 |
| 2026-02-21 12:00 |
18:39:41.72 |
-03:04:47.9 |
HIP 91394 |
20.62 |
| 2026-02-22 00:00 |
18:39:46.92 |
-03:04:14.1 |
HIP 91394 |
22.03 |
| 2026-02-22 12:00 |
18:39:52.06 |
-03:03:40.1 |
HIP 91394 |
23.43 |
| 2026-02-23 00:00 |
18:39:57.16 |
-03:03:06.0 |
HIP 91587 |
24.10 |
| 2026-02-23 12:00 |
18:40:02.21 |
-03:02:31.7 |
HIP 91587 |
23.02 |
| 2026-02-24 00:00 |
18:40:07.22 |
-03:01:57.3 |
HIP 91587 |
21.98 |