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 · 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) |
| 2026-05-12 00:00 |
23:58:47.22 |
+44:08:21.0 |
HIP 118263 |
17.24 |
| 2026-05-12 12:00 |
23:58:51.95 |
+44:09:45.8 |
HIP 118263 |
18.40 |
| 2026-05-13 00:00 |
23:58:56.63 |
+44:11:10.9 |
HIP 118263 |
19.63 |
| 2026-05-13 12:00 |
23:59:01.26 |
+44:12:36.1 |
HIP 118263 |
20.92 |
| 2026-05-14 00:00 |
23:59:05.83 |
+44:14:01.5 |
HIP 118263 |
22.26 |
| 2026-05-14 12:00 |
23:59:10.35 |
+44:15:27.0 |
HIP 118282 |
20.93 |
| 2026-05-15 00:00 |
23:59:14.82 |
+44:16:52.7 |
HIP 118282 |
19.40 |
| 2026-05-15 12:00 |
23:59:19.23 |
+44:18:18.5 |
HIP 118282 |
17.88 |
| 2026-05-16 00:00 |
23:59:23.59 |
+44:19:44.5 |
HIP 118282 |
16.39 |
| 2026-05-16 12:00 |
23:59:27.90 |
+44:21:10.6 |
HIP 118282 |
14.92 |
| 2026-05-17 00:00 |
23:59:32.15 |
+44:22:36.9 |
HIP 118282 |
13.49 |
| 2026-05-17 12:00 |
23:59:36.34 |
+44:24:03.3 |
HIP 118282 |
12.10 |
| 2026-05-18 00:00 |
23:59:40.48 |
+44:25:29.8 |
HIP 118282 |
10.77 |
| 2026-05-18 12:00 |
23:59:44.56 |
+44:26:56.4 |
HIP 118282 |
9.53 |
| 2026-05-19 00:00 |
23:59:48.58 |
+44:28:23.2 |
HIP 118282 |
8.42 |
| 2026-05-19 12:00 |
23:59:52.55 |
+44:29:50.1 |
HIP 118282 |
7.47 |
| 2026-05-20 00:00 |
23:59:56.45 |
+44:31:17.1 |
HIP 118282 |
6.78 |
| 2026-05-20 12:00 |
00:00:00.31 |
+44:32:44.2 |
HIP 118282 |
6.41 |
| 2026-05-21 00:00 |
00:00:04.10 |
+44:34:11.4 |
HIP 118282 |
6.43 |
| 2026-05-21 12:00 |
00:00:07.83 |
+44:35:38.6 |
HIP 118282 |
6.82 |
| 2026-05-22 00:00 |
00:00:11.51 |
+44:37:06.0 |
HIP 118282 |
7.52 |
| 2026-05-22 12:00 |
00:00:15.12 |
+44:38:33.5 |
HIP 118282 |
8.46 |
| 2026-05-23 00:00 |
00:00:18.68 |
+44:40:01.0 |
HIP 118282 |
9.57 |
| 2026-05-23 12:00 |
00:00:22.18 |
+44:41:28.7 |
HIP 118282 |
10.79 |
| 2026-05-24 00:00 |
00:00:25.61 |
+44:42:56.4 |
HIP 118282 |
12.08 |
| 2026-05-24 12:00 |
00:00:28.99 |
+44:44:24.1 |
HIP 119 |
12.12 |
| 2026-05-25 00:00 |
00:00:32.31 |
+44:45:52.0 |
HIP 119 |
12.13 |
| 2026-05-25 12:00 |
00:00:35.56 |
+44:47:19.8 |
HIP 119 |
12.36 |
| 2026-05-26 00:00 |
00:00:38.76 |
+44:48:47.8 |
HIP 119 |
12.78 |
| 2026-05-26 12:00 |
00:00:41.89 |
+44:50:15.8 |
HIP 119 |
13.39 |
| 2026-05-27 00:00 |
00:00:44.96 |
+44:51:43.8 |
HIP 119 |
14.15 |
| 2026-05-27 12:00 |
00:00:47.97 |
+44:53:11.9 |
HIP 119 |
15.04 |
| 2026-05-28 00:00 |
00:00:50.91 |
+44:54:40.1 |
HIP 119 |
16.05 |
| 2026-05-28 12:00 |
00:00:53.80 |
+44:56:08.2 |
HIP 119 |
17.14 |
| 2026-05-29 00:00 |
00:00:56.62 |
+44:57:36.4 |
HIP 63 |
17.74 |
| 2026-05-29 12:00 |
00:00:59.37 |
+44:59:04.6 |
HIP 63 |
16.36 |
| 2026-05-30 00:00 |
00:01:02.07 |
+45:00:32.9 |
HIP 63 |
15.01 |
| 2026-05-30 12:00 |
00:01:04.70 |
+45:02:01.2 |
HIP 63 |
13.69 |
| 2026-05-31 00:00 |
00:01:07.26 |
+45:03:29.4 |
HIP 63 |
12.43 |
| 2026-05-31 12:00 |
00:01:09.77 |
+45:04:57.7 |
HIP 63 |
11.23 |
| 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 |