메타데이터
| 항목 |
값 |
| Designation |
C/2021 J1 (Maury-Attard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-02-19T11:39:16.738560Z |
| Orbit solution date (soln_date, UTC) |
2022-02-03T20:43:07Z |
| Obs used |
106 |
| NEO |
- |
| M1 |
17.100 |
| K1 |
5.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-04-27.0000000 |
| e |
0.93438376 |
| q (au) |
1.740634 |
| a (au) |
26.527482 |
| i (deg) |
92.719322 |
| Ω (om, deg) |
88.320215 |
| ω (w, deg) |
147.329778 |
| M (ma, deg) |
0.479817 |
밝기
산란 + 전체 선형
$$
M_a = (16.232 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.232 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.512 |
| 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 |
06:21:38.84 |
-40:39:13.7 |
HIP 30260 |
14.04 |
| 2026-07-29 12:00 |
06:21:47.36 |
-40:39:56.7 |
HIP 30260 |
13.03 |
| 2026-07-30 00:00 |
06:21:55.83 |
-40:40:40.4 |
HIP 30260 |
12.17 |
| 2026-07-30 12:00 |
06:22:04.26 |
-40:41:24.8 |
HIP 30260 |
11.52 |
| 2026-07-31 00:00 |
06:22:12.64 |
-40:42:10.0 |
HIP 30260 |
11.09 |
| 2026-07-31 12:00 |
06:22:20.99 |
-40:42:55.8 |
HIP 30260 |
10.92 |
| 2026-08-01 00:00 |
06:22:29.28 |
-40:43:42.3 |
HIP 30260 |
11.01 |
| 2026-08-01 12:00 |
06:22:37.54 |
-40:44:29.5 |
HIP 30260 |
11.36 |
| 2026-08-02 00:00 |
06:22:45.74 |
-40:45:17.4 |
HIP 30260 |
11.94 |
| 2026-08-02 12:00 |
06:22:53.91 |
-40:46:05.9 |
HIP 30260 |
12.73 |
| 2026-08-03 00:00 |
06:23:02.02 |
-40:46:55.2 |
HIP 30260 |
13.68 |
| 2026-08-03 12:00 |
06:23:10.09 |
-40:47:45.1 |
HIP 30260 |
14.76 |
| 2026-08-04 00:00 |
06:23:18.11 |
-40:48:35.7 |
HIP 30260 |
15.94 |
| 2026-08-04 12:00 |
06:23:26.09 |
-40:49:27.0 |
HIP 30260 |
17.21 |
| 2026-08-05 00:00 |
06:23:34.01 |
-40:50:18.9 |
HIP 30260 |
18.54 |
| 2026-08-05 12:00 |
06:23:41.89 |
-40:51:11.6 |
HIP 30260 |
19.92 |
| 2026-08-06 00:00 |
06:23:49.71 |
-40:52:04.8 |
HIP 30260 |
21.35 |
| 2026-08-06 12:00 |
06:23:57.49 |
-40:52:58.8 |
HIP 30593 |
21.29 |
| 2026-08-07 00:00 |
06:24:05.22 |
-40:53:53.4 |
HIP 30593 |
19.65 |
| 2026-08-07 12:00 |
06:24:12.89 |
-40:54:48.6 |
HIP 30593 |
18.03 |
| 2026-08-08 00:00 |
06:24:20.52 |
-40:55:44.5 |
HIP 30593 |
16.44 |
| 2026-08-08 12:00 |
06:24:28.09 |
-40:56:41.1 |
HIP 30593 |
14.89 |
| 2026-08-09 00:00 |
06:24:35.61 |
-40:57:38.3 |
HIP 30593 |
13.38 |
| 2026-08-09 12:00 |
06:24:43.08 |
-40:58:36.1 |
HIP 30593 |
11.94 |
| 2026-08-10 00:00 |
06:24:50.49 |
-40:59:34.6 |
HIP 30593 |
10.59 |
| 2026-08-10 12:00 |
06:24:57.85 |
-41:00:33.7 |
HIP 30593 |
9.37 |
| 2026-08-11 00:00 |
06:25:05.15 |
-41:01:33.4 |
HIP 30593 |
8.34 |
| 2026-08-11 12:00 |
06:25:12.40 |
-41:02:33.8 |
HIP 30593 |
7.57 |
| 2026-08-12 00:00 |
06:25:19.59 |
-41:03:34.8 |
HIP 30593 |
7.14 |
| 2026-08-12 12:00 |
06:25:26.72 |
-41:04:36.4 |
HIP 30593 |
7.11 |
| 2026-08-13 00:00 |
06:25:33.80 |
-41:05:38.6 |
HIP 30593 |
7.50 |
| 2026-08-13 12:00 |
06:25:40.82 |
-41:06:41.4 |
HIP 30593 |
8.23 |
| 2026-08-14 00:00 |
06:25:47.78 |
-41:07:44.8 |
HIP 30593 |
9.22 |
| 2026-08-14 12:00 |
06:25:54.68 |
-41:08:48.8 |
HIP 30593 |
10.40 |
| 2026-08-15 00:00 |
06:26:01.52 |
-41:09:53.3 |
HIP 30593 |
11.72 |
| 2026-08-15 12:00 |
06:26:08.31 |
-41:10:58.5 |
HIP 30593 |
13.12 |
| 2026-08-16 00:00 |
06:26:15.03 |
-41:12:04.3 |
HIP 30593 |
14.58 |
| 2026-08-16 12:00 |
06:26:21.69 |
-41:13:10.6 |
HIP 30593 |
16.09 |
| 2026-08-17 00:00 |
06:26:28.29 |
-41:14:17.5 |
HIP 30759 |
16.30 |
| 2026-08-17 12:00 |
06:26:34.83 |
-41:15:25.0 |
HIP 30759 |
15.68 |
| 2026-08-18 00:00 |
06:26:41.31 |
-41:16:33.0 |
HIP 30759 |
15.23 |
| 2026-08-18 12:00 |
06:26:47.72 |
-41:17:41.5 |
HIP 30759 |
14.98 |
| 2026-08-19 00:00 |
06:26:54.07 |
-41:18:50.7 |
HIP 30759 |
14.92 |