메타데이터
| 항목 |
값 |
| Designation |
C/2013 S1 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-08-02T22:01:29.435520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:40Z |
| Obs used |
109 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-10-10.0000000 |
| e |
1.00043244 |
| q (au) |
2.824323 |
| a (au) |
-6531.154578 |
| i (deg) |
83.961966 |
| Ω (om, deg) |
221.536559 |
| ω (w, deg) |
166.064281 |
| M (ma, deg) |
0.000127 |
밝기
산란 + 전체 선형
$$
M_a = (11.895 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.895 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.503 |
| k |
0.800 |
| δ90 |
9.999 |
| 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) |
| 2026-09-20 00:00 |
12:09:42.55 |
-56:15:20.7 |
HIP 59360 |
13.90 |
| 2026-09-20 12:00 |
12:09:49.64 |
-56:15:27.2 |
HIP 59360 |
13.25 |
| 2026-09-21 00:00 |
12:09:56.73 |
-56:15:34.2 |
HIP 59360 |
12.64 |
| 2026-09-21 12:00 |
12:10:03.83 |
-56:15:41.6 |
HIP 59397 |
12.01 |
| 2026-09-22 00:00 |
12:10:10.93 |
-56:15:49.4 |
HIP 59397 |
11.24 |
| 2026-09-22 12:00 |
12:10:18.02 |
-56:15:57.6 |
HIP 59397 |
10.49 |
| 2026-09-23 00:00 |
12:10:25.13 |
-56:16:06.2 |
HIP 59397 |
9.78 |
| 2026-09-23 12:00 |
12:10:32.23 |
-56:16:15.2 |
HIP 59397 |
9.11 |
| 2026-09-24 00:00 |
12:10:39.33 |
-56:16:24.7 |
HIP 59397 |
8.51 |
| 2026-09-24 12:00 |
12:10:46.44 |
-56:16:34.5 |
HIP 59397 |
7.98 |
| 2026-09-25 00:00 |
12:10:53.54 |
-56:16:44.7 |
HIP 59397 |
7.53 |
| 2026-09-25 12:00 |
12:11:00.64 |
-56:16:55.3 |
HIP 59397 |
7.20 |
| 2026-09-26 00:00 |
12:11:07.75 |
-56:17:06.2 |
HIP 59397 |
6.98 |
| 2026-09-26 12:00 |
12:11:14.85 |
-56:17:17.6 |
HIP 59397 |
6.90 |
| 2026-09-27 00:00 |
12:11:21.95 |
-56:17:29.4 |
HIP 59397 |
6.95 |
| 2026-09-27 12:00 |
12:11:29.05 |
-56:17:41.6 |
HIP 59397 |
7.15 |
| 2026-09-28 00:00 |
12:11:36.15 |
-56:17:54.1 |
HIP 59397 |
7.46 |
| 2026-09-28 12:00 |
12:11:43.25 |
-56:18:07.1 |
HIP 59397 |
7.89 |
| 2026-09-29 00:00 |
12:11:50.34 |
-56:18:20.4 |
HIP 59397 |
8.42 |
| 2026-09-29 12:00 |
12:11:57.43 |
-56:18:34.2 |
HIP 59397 |
9.02 |
| 2026-09-30 00:00 |
12:12:04.52 |
-56:18:48.3 |
HIP 59397 |
9.68 |
| 2026-09-30 12:00 |
12:12:11.60 |
-56:19:02.8 |
HIP 59397 |
10.40 |
| 2026-10-01 00:00 |
12:12:18.68 |
-56:19:17.7 |
HIP 59397 |
11.16 |
| 2026-10-01 12:00 |
12:12:25.75 |
-56:19:33.0 |
HIP 59397 |
11.95 |
| 2026-10-02 00:00 |
12:12:32.82 |
-56:19:48.6 |
HIP 59397 |
12.77 |
| 2026-10-02 12:00 |
12:12:39.89 |
-56:20:04.7 |
HIP 59397 |
13.61 |
| 2026-10-03 00:00 |
12:12:46.95 |
-56:20:21.1 |
HIP 59397 |
14.48 |
| 2026-10-03 12:00 |
12:12:54.00 |
-56:20:37.9 |
HIP 59397 |
15.36 |
| 2026-10-04 00:00 |
12:13:01.05 |
-56:20:55.1 |
HIP 59397 |
16.25 |
| 2026-10-04 12:00 |
12:13:08.09 |
-56:21:12.7 |
HIP 59397 |
17.15 |
| 2026-10-05 00:00 |
12:13:15.12 |
-56:21:30.6 |
HIP 59593 |
17.63 |
| 2026-10-05 12:00 |
12:13:22.15 |
-56:21:48.9 |
HIP 59593 |
17.97 |
| 2026-10-06 00:00 |
12:13:29.16 |
-56:22:07.6 |
HIP 59593 |
18.37 |
| 2026-10-06 12:00 |
12:13:36.17 |
-56:22:26.7 |
HIP 59593 |
18.81 |
| 2026-10-07 00:00 |
12:13:43.17 |
-56:22:46.1 |
HIP 59593 |
19.31 |
| 2026-10-07 12:00 |
12:13:50.16 |
-56:23:06.0 |
HIP 59734 |
19.49 |
| 2026-10-08 00:00 |
12:13:57.14 |
-56:23:26.1 |
HIP 59734 |
19.32 |
| 2026-10-08 12:00 |
12:14:04.11 |
-56:23:46.7 |
HIP 59734 |
19.21 |
| 2026-10-09 00:00 |
12:14:11.07 |
-56:24:07.6 |
HIP 59844 |
18.76 |
| 2026-10-09 12:00 |
12:14:18.02 |
-56:24:28.9 |
HIP 59844 |
18.01 |
| 2026-10-10 00:00 |
12:14:24.96 |
-56:24:50.6 |
HIP 59844 |
17.29 |
| 2026-10-10 12:00 |
12:14:31.89 |
-56:25:12.6 |
HIP 59844 |
16.61 |
| 2026-10-11 00:00 |
12:14:38.80 |
-56:25:35.0 |
HIP 59844 |
15.97 |