메타데이터
| 항목 |
값 |
| Designation |
C/2020 F5 (MASTER) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-03-22T10:15:53.521920Z |
| Orbit solution date (soln_date, UTC) |
2024-10-31T13:12:14Z |
| Obs used |
1861 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
7.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-03-27.0000000 |
| e |
0.99509246 |
| q (au) |
4.324799 |
| a (au) |
881.256429 |
| i (deg) |
52.256923 |
| Ω (om, deg) |
350.527461 |
| ω (w, deg) |
310.997698 |
| M (ma, deg) |
0.013924 |
밝기
산란 + 전체 선형
$$
M_a = (5.786 + 3.334\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.786 |
| n |
3.334 |
| 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) |
| 2026-07-29 00:00 |
01:32:19.39 |
+58:54:23.4 |
HIP 6985 |
20.71 |
| 2026-07-29 12:00 |
01:32:18.03 |
+58:56:10.8 |
HIP 6985 |
21.36 |
| 2026-07-30 00:00 |
01:32:16.54 |
+58:57:57.9 |
HIP 7294 |
20.44 |
| 2026-07-30 12:00 |
01:32:14.92 |
+58:59:44.6 |
HIP 7294 |
19.21 |
| 2026-07-31 00:00 |
01:32:13.17 |
+59:01:30.9 |
HIP 7294 |
18.10 |
| 2026-07-31 12:00 |
01:32:11.30 |
+59:03:16.9 |
HIP 7294 |
17.13 |
| 2026-08-01 00:00 |
01:32:09.30 |
+59:05:02.5 |
HIP 7294 |
16.30 |
| 2026-08-01 12:00 |
01:32:07.17 |
+59:06:47.7 |
HIP 7294 |
15.65 |
| 2026-08-02 00:00 |
01:32:04.91 |
+59:08:32.5 |
HIP 7294 |
15.20 |
| 2026-08-02 12:00 |
01:32:02.53 |
+59:10:16.9 |
HIP 7294 |
14.97 |
| 2026-08-03 00:00 |
01:32:00.02 |
+59:12:01.0 |
HIP 7294 |
14.95 |
| 2026-08-03 12:00 |
01:31:57.38 |
+59:13:44.6 |
HIP 7294 |
15.16 |
| 2026-08-04 00:00 |
01:31:54.61 |
+59:15:27.8 |
HIP 7294 |
15.59 |
| 2026-08-04 12:00 |
01:31:51.71 |
+59:17:10.6 |
HIP 7294 |
16.20 |
| 2026-08-05 00:00 |
01:31:48.68 |
+59:18:52.9 |
HIP 7294 |
16.99 |
| 2026-08-05 12:00 |
01:31:45.53 |
+59:20:34.9 |
HIP 7294 |
17.93 |
| 2026-08-06 00:00 |
01:31:42.24 |
+59:22:16.4 |
HIP 7294 |
18.99 |
| 2026-08-06 12:00 |
01:31:38.83 |
+59:23:57.4 |
HIP 7294 |
20.16 |
| 2026-08-07 00:00 |
01:31:35.28 |
+59:25:38.0 |
HIP 7065 |
19.06 |
| 2026-08-07 12:00 |
01:31:31.61 |
+59:27:18.1 |
HIP 7065 |
17.33 |
| 2026-08-08 00:00 |
01:31:27.81 |
+59:28:57.7 |
HIP 7065 |
15.60 |
| 2026-08-08 12:00 |
01:31:23.87 |
+59:30:36.9 |
HIP 7065 |
13.88 |
| 2026-08-09 00:00 |
01:31:19.81 |
+59:32:15.6 |
HIP 7065 |
12.17 |
| 2026-08-09 12:00 |
01:31:15.61 |
+59:33:53.8 |
HIP 7065 |
10.47 |
| 2026-08-10 00:00 |
01:31:11.29 |
+59:35:31.5 |
HIP 7065 |
8.78 |
| 2026-08-10 12:00 |
01:31:06.84 |
+59:37:08.7 |
HIP 7065 |
7.11 |
| 2026-08-11 00:00 |
01:31:02.25 |
+59:38:45.4 |
HIP 7065 |
5.48 |
| 2026-08-11 12:00 |
01:30:57.54 |
+59:40:21.5 |
HIP 7065 |
3.92 |
| 2026-08-12 00:00 |
01:30:52.69 |
+59:41:57.2 |
HIP 7065 |
2.60 |
| 2026-08-12 12:00 |
01:30:47.72 |
+59:43:32.3 |
HIP 7065 |
1.99 |
| 2026-08-13 00:00 |
01:30:42.62 |
+59:45:06.8 |
HIP 7065 |
2.66 |
| 2026-08-13 12:00 |
01:30:37.39 |
+59:46:40.8 |
HIP 7013 |
2.41 |
| 2026-08-14 00:00 |
01:30:32.02 |
+59:48:14.3 |
HIP 7013 |
2.17 |
| 2026-08-14 12:00 |
01:30:26.53 |
+59:49:47.1 |
HIP 7013 |
3.05 |
| 2026-08-15 00:00 |
01:30:20.91 |
+59:51:19.5 |
HIP 7013 |
4.41 |
| 2026-08-15 12:00 |
01:30:15.17 |
+59:52:51.2 |
HIP 7013 |
5.94 |
| 2026-08-16 00:00 |
01:30:09.29 |
+59:54:22.3 |
HIP 7013 |
7.54 |
| 2026-08-16 12:00 |
01:30:03.29 |
+59:55:52.9 |
HIP 6927 |
8.67 |
| 2026-08-17 00:00 |
01:29:57.16 |
+59:57:22.9 |
HIP 6927 |
7.07 |
| 2026-08-17 12:00 |
01:29:50.90 |
+59:58:52.2 |
HIP 6927 |
5.52 |
| 2026-08-18 00:00 |
01:29:44.51 |
+60:00:21.0 |
HIP 6927 |
4.06 |
| 2026-08-18 12:00 |
01:29:38.00 |
+60:01:49.1 |
HIP 6927 |
2.85 |
| 2026-08-19 00:00 |
01:29:31.36 |
+60:03:16.6 |
HIP 6927 |
2.30 |