메타데이터
| 항목 |
값 |
| Designation |
C/2020 R6 (Rankin) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-09-09T23:50:03.036480Z |
| Orbit solution date (soln_date, UTC) |
2021-12-17T03:12:50Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
14.800 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-09-15T10:08:55.968000Z |
| Discovery magnitude (MPC) |
20.20 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-08-21.0000000 |
| e |
0.99221066 |
| q (au) |
3.129707 |
| a (au) |
401.793824 |
| i (deg) |
82.814904 |
| Ω (om, deg) |
12.177097 |
| ω (w, deg) |
272.005055 |
| M (ma, deg) |
0.042343 |
밝기
산란 + 전체 선형
$$
M_a = (17.617 + 2.630\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.617 |
| n |
2.630 |
| gf |
1.000 |
| gb |
-0.821 |
| k |
0.800 |
| δ90 |
9.998 |
| 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 |
00:01:12.20 |
+45:06:26.0 |
HIP 63 |
10.11 |
| 2026-06-01 12:00 |
00:01:14.58 |
+45:07:54.3 |
HIP 63 |
9.11 |
| 2026-06-02 00:00 |
00:01:16.88 |
+45:09:22.6 |
HIP 63 |
8.26 |
| 2026-06-02 12:00 |
00:01:19.12 |
+45:10:50.9 |
HIP 63 |
7.62 |
| 2026-06-03 00:00 |
00:01:21.30 |
+45:12:19.2 |
HIP 63 |
7.23 |
| 2026-06-03 12:00 |
00:01:23.41 |
+45:13:47.5 |
HIP 63 |
7.14 |
| 2026-06-04 00:00 |
00:01:25.45 |
+45:15:15.7 |
HIP 63 |
7.36 |
| 2026-06-04 12:00 |
00:01:27.43 |
+45:16:43.9 |
HIP 63 |
7.86 |
| 2026-06-05 00:00 |
00:01:29.34 |
+45:18:12.1 |
HIP 63 |
8.59 |
| 2026-06-05 12:00 |
00:01:31.19 |
+45:19:40.3 |
HIP 63 |
9.49 |
| 2026-06-06 00:00 |
00:01:32.96 |
+45:21:08.4 |
HIP 63 |
10.52 |
| 2026-06-06 12:00 |
00:01:34.67 |
+45:22:36.5 |
HIP 63 |
11.64 |
| 2026-06-07 00:00 |
00:01:36.31 |
+45:24:04.6 |
HIP 63 |
12.83 |
| 2026-06-07 12:00 |
00:01:37.88 |
+45:25:32.6 |
HIP 63 |
14.07 |
| 2026-06-08 00:00 |
00:01:39.38 |
+45:27:00.5 |
HIP 63 |
15.34 |
| 2026-06-08 12:00 |
00:01:40.82 |
+45:28:28.4 |
HIP 63 |
16.65 |
| 2026-06-09 00:00 |
00:01:42.18 |
+45:29:56.2 |
HIP 63 |
17.97 |
| 2026-06-09 12:00 |
00:01:43.48 |
+45:31:23.9 |
HIP 63 |
19.31 |
| 2026-06-10 00:00 |
00:01:44.71 |
+45:32:51.6 |
HIP 63 |
20.66 |
| 2026-06-10 12:00 |
00:01:45.86 |
+45:34:19.2 |
HIP 63 |
22.02 |
| 2026-06-11 00:00 |
00:01:46.95 |
+45:35:46.7 |
HIP 63 |
23.39 |
| 2026-06-11 12:00 |
00:01:47.96 |
+45:37:14.1 |
HIP 63 |
24.76 |
| 2026-06-12 00:00 |
00:01:48.91 |
+45:38:41.4 |
HIP 63 |
26.13 |
| 2026-06-12 12:00 |
00:01:49.78 |
+45:40:08.7 |
HIP 63 |
27.51 |
| 2026-06-13 00:00 |
00:01:50.58 |
+45:41:35.8 |
HIP 63 |
28.89 |
| 2026-06-13 12:00 |
00:01:51.31 |
+45:43:02.8 |
HIP 63 |
30.27 |
| 2026-06-14 00:00 |
00:01:51.97 |
+45:44:29.7 |
HIP 63 |
31.65 |
| 2026-06-14 12:00 |
00:01:52.56 |
+45:45:56.5 |
HIP 155 |
30.22 |
| 2026-06-15 00:00 |
00:01:53.07 |
+45:47:23.1 |
HIP 155 |
28.78 |
| 2026-06-15 12:00 |
00:01:53.51 |
+45:48:49.6 |
HIP 155 |
27.33 |
| 2026-06-16 00:00 |
00:01:53.88 |
+45:50:16.0 |
HIP 155 |
25.89 |
| 2026-06-16 12:00 |
00:01:54.17 |
+45:51:42.3 |
HIP 155 |
24.45 |
| 2026-06-17 00:00 |
00:01:54.40 |
+45:53:08.4 |
HIP 155 |
23.02 |
| 2026-06-17 12:00 |
00:01:54.54 |
+45:54:34.3 |
HIP 155 |
21.59 |
| 2026-06-18 00:00 |
00:01:54.62 |
+45:56:00.1 |
HIP 155 |
20.16 |
| 2026-06-18 12:00 |
00:01:54.62 |
+45:57:25.7 |
HIP 155 |
18.73 |
| 2026-06-19 00:00 |
00:01:54.55 |
+45:58:51.2 |
HIP 155 |
17.31 |
| 2026-06-19 12:00 |
00:01:54.40 |
+46:00:16.5 |
HIP 155 |
15.89 |
| 2026-06-20 00:00 |
00:01:54.18 |
+46:01:41.6 |
HIP 155 |
14.47 |
| 2026-06-20 12:00 |
00:01:53.89 |
+46:03:06.5 |
HIP 155 |
13.06 |
| 2026-06-21 00:00 |
00:01:53.52 |
+46:04:31.3 |
HIP 155 |
11.65 |
| 2026-06-21 12:00 |
00:01:53.08 |
+46:05:55.8 |
HIP 155 |
10.25 |
| 2026-06-22 00:00 |
00:01:52.56 |
+46:07:20.2 |
HIP 155 |
8.86 |