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) |
| 2026-03-26 00:00 |
11:37:07.20 |
-60:03:04.4 |
HIP 56595 |
7.30 |
| 2026-03-26 12:00 |
11:36:59.03 |
-60:02:49.2 |
HIP 56595 |
6.25 |
| 2026-03-27 00:00 |
11:36:50.87 |
-60:02:33.6 |
HIP 56595 |
5.21 |
| 2026-03-27 12:00 |
11:36:42.73 |
-60:02:17.4 |
HIP 56595 |
4.16 |
| 2026-03-28 00:00 |
11:36:34.61 |
-60:02:00.6 |
HIP 56595 |
3.12 |
| 2026-03-28 12:00 |
11:36:26.51 |
-60:01:43.4 |
HIP 56595 |
2.09 |
| 2026-03-29 00:00 |
11:36:18.42 |
-60:01:25.6 |
HIP 56595 |
1.10 |
| 2026-03-29 12:00 |
11:36:10.36 |
-60:01:07.4 |
HIP 56595 |
0.49 |
| 2026-03-30 00:00 |
11:36:02.33 |
-60:00:48.6 |
HIP 56595 |
1.22 |
| 2026-03-30 12:00 |
11:35:54.31 |
-60:00:29.3 |
HIP 56595 |
2.22 |
| 2026-03-31 00:00 |
11:35:46.32 |
-60:00:09.4 |
HIP 56595 |
3.25 |
| 2026-03-31 12:00 |
11:35:38.35 |
-59:59:49.1 |
HIP 56595 |
4.29 |
| 2026-04-01 00:00 |
11:35:30.40 |
-59:59:28.3 |
HIP 56595 |
5.34 |
| 2026-04-01 12:00 |
11:35:22.48 |
-59:59:07.0 |
HIP 56595 |
6.38 |
| 2026-04-02 00:00 |
11:35:14.59 |
-59:58:45.1 |
HIP 56595 |
7.43 |
| 2026-04-02 12:00 |
11:35:06.72 |
-59:58:22.8 |
HIP 56595 |
8.48 |
| 2026-04-03 00:00 |
11:34:58.88 |
-59:58:00.0 |
HIP 56595 |
9.53 |
| 2026-04-03 12:00 |
11:34:51.07 |
-59:57:36.7 |
HIP 56595 |
10.58 |
| 2026-04-04 00:00 |
11:34:43.29 |
-59:57:12.9 |
HIP 56595 |
11.62 |
| 2026-04-04 12:00 |
11:34:35.53 |
-59:56:48.6 |
HIP 56595 |
12.67 |
| 2026-04-05 00:00 |
11:34:27.81 |
-59:56:23.9 |
HIP 56595 |
13.72 |
| 2026-04-05 12:00 |
11:34:20.12 |
-59:55:58.7 |
HIP 56595 |
14.77 |
| 2026-04-06 00:00 |
11:34:12.45 |
-59:55:32.9 |
HIP 56422 |
14.67 |
| 2026-04-06 12:00 |
11:34:04.82 |
-59:55:06.8 |
HIP 56422 |
14.22 |
| 2026-04-07 00:00 |
11:33:57.22 |
-59:54:40.1 |
HIP 56422 |
13.83 |
| 2026-04-07 12:00 |
11:33:49.66 |
-59:54:13.0 |
HIP 56422 |
13.50 |
| 2026-04-08 00:00 |
11:33:42.13 |
-59:53:45.4 |
HIP 56422 |
13.24 |
| 2026-04-08 12:00 |
11:33:34.63 |
-59:53:17.4 |
HIP 56301 |
12.87 |
| 2026-04-09 00:00 |
11:33:27.17 |
-59:52:48.9 |
HIP 56301 |
11.93 |
| 2026-04-09 12:00 |
11:33:19.74 |
-59:52:19.9 |
HIP 56301 |
11.01 |
| 2026-04-10 00:00 |
11:33:12.35 |
-59:51:50.5 |
HIP 56301 |
10.11 |
| 2026-04-10 12:00 |
11:33:05.00 |
-59:51:20.6 |
HIP 56301 |
9.23 |
| 2026-04-11 00:00 |
11:32:57.68 |
-59:50:50.3 |
HIP 56301 |
8.39 |
| 2026-04-11 12:00 |
11:32:50.41 |
-59:50:19.6 |
HIP 56301 |
7.60 |
| 2026-04-12 00:00 |
11:32:43.17 |
-59:49:48.4 |
HIP 56301 |
6.87 |
| 2026-04-12 12:00 |
11:32:35.97 |
-59:49:16.8 |
HIP 56301 |
6.23 |
| 2026-04-13 00:00 |
11:32:28.81 |
-59:48:44.8 |
HIP 56264 |
5.65 |
| 2026-04-13 12:00 |
11:32:21.69 |
-59:48:12.3 |
HIP 56264 |
4.68 |
| 2026-04-14 00:00 |
11:32:14.62 |
-59:47:39.4 |
HIP 56264 |
3.73 |
| 2026-04-14 12:00 |
11:32:07.59 |
-59:47:06.1 |
HIP 56264 |
2.85 |
| 2026-04-15 00:00 |
11:32:00.59 |
-59:46:32.4 |
HIP 56264 |
2.11 |
| 2026-04-15 12:00 |
11:31:53.65 |
-59:45:58.2 |
HIP 56264 |
1.72 |
| 2026-04-16 00:00 |
11:31:46.74 |
-59:45:23.7 |
HIP 56264 |
1.90 |