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 |
-0.998 |
| 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 |
05:48:02.40 |
-44:26:14.4 |
HIP 27499 |
20.48 |
| 2026-03-26 12:00 |
05:48:04.09 |
-44:24:01.4 |
HIP 27499 |
21.94 |
| 2026-03-27 00:00 |
05:48:05.88 |
-44:21:48.6 |
HIP 27499 |
23.51 |
| 2026-03-27 12:00 |
05:48:07.76 |
-44:19:36.0 |
HIP 27499 |
25.16 |
| 2026-03-28 00:00 |
05:48:09.74 |
-44:17:23.8 |
HIP 27499 |
26.89 |
| 2026-03-28 12:00 |
05:48:11.82 |
-44:15:11.8 |
HIP 27499 |
28.67 |
| 2026-03-29 00:00 |
05:48:13.99 |
-44:13:00.1 |
HIP 27499 |
30.50 |
| 2026-03-29 12:00 |
05:48:16.26 |
-44:10:48.6 |
HIP 27499 |
32.37 |
| 2026-03-30 00:00 |
05:48:18.62 |
-44:08:37.5 |
HIP 27499 |
34.28 |
| 2026-03-30 12:00 |
05:48:21.07 |
-44:06:26.7 |
HIP 27578 |
33.38 |
| 2026-03-31 00:00 |
05:48:23.62 |
-44:04:16.2 |
HIP 27578 |
31.50 |
| 2026-03-31 12:00 |
05:48:26.26 |
-44:02:05.9 |
HIP 27578 |
29.66 |
| 2026-04-01 00:00 |
05:48:28.99 |
-43:59:56.1 |
HIP 27578 |
27.87 |
| 2026-04-01 12:00 |
05:48:31.82 |
-43:57:46.5 |
HIP 27578 |
26.13 |
| 2026-04-02 00:00 |
05:48:34.73 |
-43:55:37.3 |
HIP 27578 |
24.45 |
| 2026-04-02 12:00 |
05:48:37.74 |
-43:53:28.4 |
HIP 27578 |
22.86 |
| 2026-04-03 00:00 |
05:48:40.83 |
-43:51:19.8 |
HIP 27578 |
21.37 |
| 2026-04-03 12:00 |
05:48:44.02 |
-43:49:11.7 |
HIP 27578 |
19.99 |
| 2026-04-04 00:00 |
05:48:47.29 |
-43:47:03.9 |
HIP 27578 |
18.76 |
| 2026-04-04 12:00 |
05:48:50.65 |
-43:44:56.4 |
HIP 27578 |
17.71 |
| 2026-04-05 00:00 |
05:48:54.11 |
-43:42:49.3 |
HIP 27578 |
16.87 |
| 2026-04-05 12:00 |
05:48:57.64 |
-43:40:42.6 |
HIP 27578 |
16.27 |
| 2026-04-06 00:00 |
05:49:01.27 |
-43:38:36.3 |
HIP 27578 |
15.93 |
| 2026-04-06 12:00 |
05:49:04.98 |
-43:36:30.4 |
HIP 27578 |
15.88 |
| 2026-04-07 00:00 |
05:49:08.78 |
-43:34:24.9 |
HIP 27532 |
14.70 |
| 2026-04-07 12:00 |
05:49:12.67 |
-43:32:19.8 |
HIP 27532 |
12.57 |
| 2026-04-08 00:00 |
05:49:16.64 |
-43:30:15.1 |
HIP 27532 |
10.45 |
| 2026-04-08 12:00 |
05:49:20.69 |
-43:28:10.9 |
HIP 27532 |
8.38 |
| 2026-04-09 00:00 |
05:49:24.83 |
-43:26:07.0 |
HIP 27532 |
6.38 |
| 2026-04-09 12:00 |
05:49:29.06 |
-43:24:03.6 |
HIP 27532 |
4.56 |
| 2026-04-10 00:00 |
05:49:33.36 |
-43:22:00.7 |
HIP 27532 |
3.23 |
| 2026-04-10 12:00 |
05:49:37.75 |
-43:19:58.2 |
HIP 27532 |
3.09 |
| 2026-04-11 00:00 |
05:49:42.23 |
-43:17:56.1 |
HIP 27532 |
4.26 |
| 2026-04-11 12:00 |
05:49:46.78 |
-43:15:54.5 |
HIP 27532 |
6.02 |
| 2026-04-12 00:00 |
05:49:51.41 |
-43:13:53.4 |
HIP 27532 |
7.99 |
| 2026-04-12 12:00 |
05:49:56.13 |
-43:11:52.7 |
HIP 27532 |
10.04 |
| 2026-04-13 00:00 |
05:50:00.93 |
-43:09:52.6 |
HIP 27532 |
12.14 |
| 2026-04-13 12:00 |
05:50:05.80 |
-43:07:52.9 |
HIP 27532 |
14.25 |
| 2026-04-14 00:00 |
05:50:10.76 |
-43:05:53.7 |
HIP 27532 |
16.38 |
| 2026-04-14 12:00 |
05:50:15.79 |
-43:03:55.0 |
HIP 27532 |
18.52 |
| 2026-04-15 00:00 |
05:50:20.90 |
-43:01:56.8 |
HIP 27532 |
20.66 |
| 2026-04-15 12:00 |
05:50:26.09 |
-42:59:59.1 |
HIP 27532 |
22.80 |
| 2026-04-16 00:00 |
05:50:31.36 |
-42:58:02.0 |
HIP 27767 |
23.82 |