메타데이터
| 항목 |
값 |
| Designation |
P/2020 W1 (Rankin) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-04-04T04:06:18.002880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:15Z |
| Obs used |
89 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-11-16T08:16:49.900800Z |
| Discovery magnitude (MPC) |
20.90 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-11-08.0000000 |
| e |
0.26491783 |
| q (au) |
5.287627 |
| a (au) |
7.193246 |
| i (deg) |
10.792086 |
| Ω (om, deg) |
124.257217 |
| ω (w, deg) |
264.771285 |
| M (ma, deg) |
11.128390 |
밝기
산란 + 전체 선형
$$
M_a = (13.338 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.338 |
| n |
2.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
11:04:48.39 |
+14:27:09.9 |
HIP 54103 |
14.77 |
| 2026-03-26 12:00 |
11:04:38.98 |
+14:28:05.9 |
HIP 54103 |
14.46 |
| 2026-03-27 00:00 |
11:04:29.63 |
+14:29:01.2 |
HIP 54103 |
14.57 |
| 2026-03-27 12:00 |
11:04:20.34 |
+14:29:55.8 |
HIP 54113 |
13.56 |
| 2026-03-28 00:00 |
11:04:11.10 |
+14:30:49.8 |
HIP 54113 |
12.89 |
| 2026-03-28 12:00 |
11:04:01.92 |
+14:31:43.1 |
HIP 54113 |
12.65 |
| 2026-03-29 00:00 |
11:03:52.80 |
+14:32:35.7 |
HIP 54113 |
12.87 |
| 2026-03-29 12:00 |
11:03:43.75 |
+14:33:27.7 |
HIP 54113 |
13.50 |
| 2026-03-30 00:00 |
11:03:34.75 |
+14:34:19.0 |
HIP 54113 |
14.49 |
| 2026-03-30 12:00 |
11:03:25.82 |
+14:35:09.6 |
HIP 54113 |
15.75 |
| 2026-03-31 00:00 |
11:03:16.95 |
+14:35:59.5 |
HIP 54113 |
17.23 |
| 2026-03-31 12:00 |
11:03:08.15 |
+14:36:48.8 |
HIP 54113 |
18.87 |
| 2026-04-01 00:00 |
11:02:59.42 |
+14:37:37.3 |
HIP 54113 |
20.61 |
| 2026-04-01 12:00 |
11:02:50.75 |
+14:38:25.1 |
HIP 54113 |
22.43 |
| 2026-04-02 00:00 |
11:02:42.15 |
+14:39:12.3 |
HIP 54113 |
24.31 |
| 2026-04-02 12:00 |
11:02:33.62 |
+14:39:58.7 |
HIP 54113 |
26.23 |
| 2026-04-03 00:00 |
11:02:25.17 |
+14:40:44.4 |
HIP 53881 |
24.52 |
| 2026-04-03 12:00 |
11:02:16.78 |
+14:41:29.4 |
HIP 53881 |
22.76 |
| 2026-04-04 00:00 |
11:02:08.47 |
+14:42:13.7 |
HIP 53881 |
21.09 |
| 2026-04-04 12:00 |
11:02:00.23 |
+14:42:57.2 |
HIP 53881 |
19.53 |
| 2026-04-05 00:00 |
11:01:52.06 |
+14:43:40.0 |
HIP 53881 |
18.11 |
| 2026-04-05 12:00 |
11:01:43.98 |
+14:44:22.1 |
HIP 53881 |
16.84 |
| 2026-04-06 00:00 |
11:01:35.96 |
+14:45:03.5 |
HIP 53881 |
15.76 |
| 2026-04-06 12:00 |
11:01:28.03 |
+14:45:44.2 |
HIP 53881 |
14.90 |
| 2026-04-07 00:00 |
11:01:20.18 |
+14:46:24.1 |
HIP 53881 |
14.29 |
| 2026-04-07 12:00 |
11:01:12.40 |
+14:47:03.2 |
HIP 53881 |
13.96 |
| 2026-04-08 00:00 |
11:01:04.71 |
+14:47:41.6 |
HIP 53881 |
13.91 |
| 2026-04-08 12:00 |
11:00:57.10 |
+14:48:19.3 |
HIP 53881 |
14.13 |
| 2026-04-09 00:00 |
11:00:49.57 |
+14:48:56.2 |
HIP 53881 |
14.61 |
| 2026-04-09 12:00 |
11:00:42.12 |
+14:49:32.4 |
HIP 53881 |
15.31 |
| 2026-04-10 00:00 |
11:00:34.76 |
+14:50:07.8 |
HIP 53881 |
16.20 |
| 2026-04-10 12:00 |
11:00:27.49 |
+14:50:42.5 |
HIP 53881 |
17.24 |
| 2026-04-11 00:00 |
11:00:20.30 |
+14:51:16.4 |
HIP 53881 |
18.39 |
| 2026-04-11 12:00 |
11:00:13.19 |
+14:51:49.5 |
HIP 53881 |
19.63 |
| 2026-04-12 00:00 |
11:00:06.18 |
+14:52:21.8 |
HIP 53881 |
20.94 |
| 2026-04-12 12:00 |
10:59:59.25 |
+14:52:53.4 |
HIP 53881 |
22.30 |
| 2026-04-13 00:00 |
10:59:52.42 |
+14:53:24.3 |
HIP 53881 |
23.69 |
| 2026-04-13 12:00 |
10:59:45.68 |
+14:53:54.3 |
HIP 53881 |
25.11 |
| 2026-04-14 00:00 |
10:59:39.02 |
+14:54:23.6 |
HIP 53881 |
26.54 |
| 2026-04-14 12:00 |
10:59:32.46 |
+14:54:52.1 |
HIP 53881 |
27.98 |
| 2026-04-15 00:00 |
10:59:26.00 |
+14:55:19.8 |
HIP 53881 |
29.43 |
| 2026-04-15 12:00 |
10:59:19.62 |
+14:55:46.8 |
HIP 53881 |
30.87 |
| 2026-04-16 00:00 |
10:59:13.35 |
+14:56:12.9 |
HIP 53881 |
32.30 |