메타데이터
| 항목 |
값 |
| Designation |
C/2012 J1 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-12-07T05:37:22.232640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:08Z |
| Obs used |
4401 |
| NEO |
- |
| M1 |
6.000 |
| K1 |
12.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-11-16.0000000 |
| e |
1.00132777 |
| q (au) |
3.158711 |
| a (au) |
-2378.965648 |
| i (deg) |
34.186089 |
| Ω (om, deg) |
235.217062 |
| ω (w, deg) |
147.272733 |
| M (ma, deg) |
-0.000180 |
밝기
산란 + 전체 선형
$$
M_a = (5.312 + 4.942\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.312 |
| n |
4.942 |
| gf |
1.000 |
| gb |
-0.923 |
| 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 |
10:15:40.41 |
-25:00:43.3 |
HIP 50219 |
7.75 |
| 2026-03-26 12:00 |
10:15:37.14 |
-25:00:08.9 |
HIP 50219 |
6.93 |
| 2026-03-27 00:00 |
10:15:33.90 |
-24:59:34.4 |
HIP 50219 |
6.14 |
| 2026-03-27 12:00 |
10:15:30.67 |
-24:58:59.7 |
HIP 50219 |
5.41 |
| 2026-03-28 00:00 |
10:15:27.47 |
-24:58:24.8 |
HIP 50219 |
4.76 |
| 2026-03-28 12:00 |
10:15:24.29 |
-24:57:49.8 |
HIP 50219 |
4.21 |
| 2026-03-29 00:00 |
10:15:21.14 |
-24:57:14.6 |
HIP 50219 |
3.82 |
| 2026-03-29 12:00 |
10:15:18.01 |
-24:56:39.3 |
HIP 50219 |
3.64 |
| 2026-03-30 00:00 |
10:15:14.90 |
-24:56:03.8 |
HIP 50219 |
3.69 |
| 2026-03-30 12:00 |
10:15:11.82 |
-24:55:28.1 |
HIP 50219 |
3.96 |
| 2026-03-31 00:00 |
10:15:08.76 |
-24:54:52.4 |
HIP 50219 |
4.42 |
| 2026-03-31 12:00 |
10:15:05.73 |
-24:54:16.4 |
HIP 50219 |
5.00 |
| 2026-04-01 00:00 |
10:15:02.72 |
-24:53:40.4 |
HIP 50219 |
5.67 |
| 2026-04-01 12:00 |
10:14:59.74 |
-24:53:04.1 |
HIP 50219 |
6.40 |
| 2026-04-02 00:00 |
10:14:56.78 |
-24:52:27.8 |
HIP 50219 |
7.17 |
| 2026-04-02 12:00 |
10:14:53.85 |
-24:51:51.3 |
HIP 50219 |
7.97 |
| 2026-04-03 00:00 |
10:14:50.94 |
-24:51:14.7 |
HIP 50219 |
8.79 |
| 2026-04-03 12:00 |
10:14:48.06 |
-24:50:38.0 |
HIP 50219 |
9.62 |
| 2026-04-04 00:00 |
10:14:45.21 |
-24:50:01.2 |
HIP 50219 |
10.47 |
| 2026-04-04 12:00 |
10:14:42.38 |
-24:49:24.2 |
HIP 50219 |
11.31 |
| 2026-04-05 00:00 |
10:14:39.58 |
-24:48:47.1 |
HIP 50219 |
12.17 |
| 2026-04-05 12:00 |
10:14:36.80 |
-24:48:09.9 |
HIP 50219 |
13.02 |
| 2026-04-06 00:00 |
10:14:34.06 |
-24:47:32.6 |
HIP 50219 |
13.88 |
| 2026-04-06 12:00 |
10:14:31.34 |
-24:46:55.2 |
HIP 50219 |
14.74 |
| 2026-04-07 00:00 |
10:14:28.64 |
-24:46:17.7 |
HIP 50219 |
15.60 |
| 2026-04-07 12:00 |
10:14:25.98 |
-24:45:40.1 |
HIP 50219 |
16.45 |
| 2026-04-08 00:00 |
10:14:23.34 |
-24:45:02.4 |
HIP 50219 |
17.31 |
| 2026-04-08 12:00 |
10:14:20.73 |
-24:44:24.6 |
HIP 50219 |
18.17 |
| 2026-04-09 00:00 |
10:14:18.15 |
-24:43:46.7 |
HIP 50219 |
19.02 |
| 2026-04-09 12:00 |
10:14:15.60 |
-24:43:08.7 |
HIP 50219 |
19.87 |
| 2026-04-10 00:00 |
10:14:13.08 |
-24:42:30.6 |
HIP 50219 |
20.72 |
| 2026-04-10 12:00 |
10:14:10.59 |
-24:41:52.5 |
HIP 50219 |
21.57 |
| 2026-04-11 00:00 |
10:14:08.12 |
-24:41:14.3 |
HIP 50219 |
22.41 |
| 2026-04-11 12:00 |
10:14:05.69 |
-24:40:36.0 |
HIP 50219 |
23.26 |
| 2026-04-12 00:00 |
10:14:03.28 |
-24:39:57.6 |
HIP 50219 |
24.10 |
| 2026-04-12 12:00 |
10:14:00.91 |
-24:39:19.2 |
HIP 50219 |
24.93 |
| 2026-04-13 00:00 |
10:13:58.56 |
-24:38:40.7 |
HIP 50219 |
25.77 |
| 2026-04-13 12:00 |
10:13:56.25 |
-24:38:02.1 |
HIP 50219 |
26.60 |
| 2026-04-14 00:00 |
10:13:53.96 |
-24:37:23.5 |
HIP 50219 |
27.42 |
| 2026-04-14 12:00 |
10:13:51.71 |
-24:36:44.8 |
HIP 50219 |
28.25 |
| 2026-04-15 00:00 |
10:13:49.48 |
-24:36:06.1 |
HIP 50219 |
29.06 |
| 2026-04-15 12:00 |
10:13:47.29 |
-24:35:27.3 |
HIP 50219 |
29.88 |
| 2026-04-16 00:00 |
10:13:45.13 |
-24:34:48.5 |
HIP 50219 |
30.69 |