메타데이터
| 항목 |
값 |
| Designation |
C/2013 F2 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-04-19T00:12:51.621120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:32Z |
| Obs used |
168 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-07-28.0000000 |
| e |
0.99925889 |
| q (au) |
6.217862 |
| a (au) |
8389.886246 |
| i (deg) |
61.749267 |
| Ω (om, deg) |
344.272220 |
| ω (w, deg) |
122.991132 |
| M (ma, deg) |
0.000128 |
밝기
산란 + 전체 선형
$$
M_a = (2.163 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
2.163 |
| n |
6.000 |
| 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) |
| 2026-09-20 00:00 |
11:41:48.14 |
-57:15:05.0 |
HIP 56871 |
18.02 |
| 2026-09-20 12:00 |
11:41:55.66 |
-57:15:29.7 |
HIP 57054 |
18.50 |
| 2026-09-21 00:00 |
11:42:03.17 |
-57:15:54.9 |
HIP 57097 |
18.09 |
| 2026-09-21 12:00 |
11:42:10.68 |
-57:16:20.5 |
HIP 57097 |
17.58 |
| 2026-09-22 00:00 |
11:42:18.18 |
-57:16:46.5 |
HIP 57097 |
17.13 |
| 2026-09-22 12:00 |
11:42:25.69 |
-57:17:13.0 |
HIP 57097 |
16.73 |
| 2026-09-23 00:00 |
11:42:33.19 |
-57:17:39.9 |
HIP 57097 |
16.39 |
| 2026-09-23 12:00 |
11:42:40.68 |
-57:18:07.2 |
HIP 57097 |
16.11 |
| 2026-09-24 00:00 |
11:42:48.17 |
-57:18:34.9 |
HIP 57097 |
15.89 |
| 2026-09-24 12:00 |
11:42:55.65 |
-57:19:03.1 |
HIP 57097 |
15.75 |
| 2026-09-25 00:00 |
11:43:03.13 |
-57:19:31.6 |
HIP 57097 |
15.67 |
| 2026-09-25 12:00 |
11:43:10.61 |
-57:20:00.7 |
HIP 57097 |
15.66 |
| 2026-09-26 00:00 |
11:43:18.07 |
-57:20:30.1 |
HIP 57097 |
15.73 |
| 2026-09-26 12:00 |
11:43:25.53 |
-57:21:00.0 |
HIP 57097 |
15.87 |
| 2026-09-27 00:00 |
11:43:32.98 |
-57:21:30.2 |
HIP 57097 |
16.08 |
| 2026-09-27 12:00 |
11:43:40.43 |
-57:22:00.9 |
HIP 57097 |
16.36 |
| 2026-09-28 00:00 |
11:43:47.87 |
-57:22:32.0 |
HIP 57097 |
16.71 |
| 2026-09-28 12:00 |
11:43:55.30 |
-57:23:03.5 |
HIP 57331 |
15.90 |
| 2026-09-29 00:00 |
11:44:02.71 |
-57:23:35.4 |
HIP 57331 |
14.83 |
| 2026-09-29 12:00 |
11:44:10.13 |
-57:24:07.7 |
HIP 57331 |
13.76 |
| 2026-09-30 00:00 |
11:44:17.53 |
-57:24:40.5 |
HIP 57331 |
12.70 |
| 2026-09-30 12:00 |
11:44:24.92 |
-57:25:13.7 |
HIP 57331 |
11.65 |
| 2026-10-01 00:00 |
11:44:32.30 |
-57:25:47.2 |
HIP 57331 |
10.61 |
| 2026-10-01 12:00 |
11:44:39.67 |
-57:26:21.2 |
HIP 57331 |
9.60 |
| 2026-10-02 00:00 |
11:44:47.03 |
-57:26:55.6 |
HIP 57331 |
8.60 |
| 2026-10-02 12:00 |
11:44:54.37 |
-57:27:30.4 |
HIP 57331 |
7.65 |
| 2026-10-03 00:00 |
11:45:01.71 |
-57:28:05.5 |
HIP 57331 |
6.74 |
| 2026-10-03 12:00 |
11:45:09.03 |
-57:28:41.1 |
HIP 57331 |
5.92 |
| 2026-10-04 00:00 |
11:45:16.34 |
-57:29:17.1 |
HIP 57331 |
5.21 |
| 2026-10-04 12:00 |
11:45:23.64 |
-57:29:53.5 |
HIP 57331 |
4.67 |
| 2026-10-05 00:00 |
11:45:30.92 |
-57:30:30.3 |
HIP 57331 |
4.37 |
| 2026-10-05 12:00 |
11:45:38.19 |
-57:31:07.5 |
HIP 57331 |
4.36 |
| 2026-10-06 00:00 |
11:45:45.44 |
-57:31:45.1 |
HIP 57331 |
4.64 |
| 2026-10-06 12:00 |
11:45:52.68 |
-57:32:23.1 |
HIP 57331 |
5.16 |
| 2026-10-07 00:00 |
11:45:59.90 |
-57:33:01.4 |
HIP 57331 |
5.87 |
| 2026-10-07 12:00 |
11:46:07.11 |
-57:33:40.2 |
HIP 57331 |
6.70 |
| 2026-10-08 00:00 |
11:46:14.30 |
-57:34:19.3 |
HIP 57331 |
7.61 |
| 2026-10-08 12:00 |
11:46:21.47 |
-57:34:58.9 |
HIP 57331 |
8.59 |
| 2026-10-09 00:00 |
11:46:28.63 |
-57:35:38.8 |
HIP 57512 |
9.14 |
| 2026-10-09 12:00 |
11:46:35.76 |
-57:36:19.1 |
HIP 57512 |
7.98 |
| 2026-10-10 00:00 |
11:46:42.88 |
-57:36:59.8 |
HIP 57512 |
6.82 |
| 2026-10-10 12:00 |
11:46:49.98 |
-57:37:40.8 |
HIP 57512 |
5.67 |
| 2026-10-11 00:00 |
11:46:57.06 |
-57:38:22.3 |
HIP 57512 |
4.52 |