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) |
| 2026-07-29 00:00 |
11:29:44.72 |
-57:14:05.6 |
HIP 56153 |
9.18 |
| 2026-07-29 12:00 |
11:29:50.12 |
-57:13:42.9 |
HIP 56153 |
8.38 |
| 2026-07-30 00:00 |
11:29:55.56 |
-57:13:20.6 |
HIP 56153 |
7.59 |
| 2026-07-30 12:00 |
11:30:01.04 |
-57:12:58.7 |
HIP 56153 |
6.81 |
| 2026-07-31 00:00 |
11:30:06.56 |
-57:12:37.2 |
HIP 56153 |
6.04 |
| 2026-07-31 12:00 |
11:30:12.12 |
-57:12:16.1 |
HIP 56153 |
5.30 |
| 2026-08-01 00:00 |
11:30:17.72 |
-57:11:55.5 |
HIP 56153 |
4.58 |
| 2026-08-01 12:00 |
11:30:23.35 |
-57:11:35.3 |
HIP 56153 |
3.92 |
| 2026-08-02 00:00 |
11:30:29.03 |
-57:11:15.4 |
HIP 56153 |
3.34 |
| 2026-08-02 12:00 |
11:30:34.74 |
-57:10:56.1 |
HIP 56153 |
2.90 |
| 2026-08-03 00:00 |
11:30:40.49 |
-57:10:37.1 |
HIP 56153 |
2.66 |
| 2026-08-03 12:00 |
11:30:46.28 |
-57:10:18.5 |
HIP 56153 |
2.69 |
| 2026-08-04 00:00 |
11:30:52.10 |
-57:10:00.4 |
HIP 56153 |
2.98 |
| 2026-08-04 12:00 |
11:30:57.96 |
-57:09:42.7 |
HIP 56153 |
3.46 |
| 2026-08-05 00:00 |
11:31:03.86 |
-57:09:25.5 |
HIP 56153 |
4.07 |
| 2026-08-05 12:00 |
11:31:09.79 |
-57:09:08.6 |
HIP 56153 |
4.77 |
| 2026-08-06 00:00 |
11:31:15.76 |
-57:08:52.2 |
HIP 56153 |
5.51 |
| 2026-08-06 12:00 |
11:31:21.76 |
-57:08:36.2 |
HIP 56153 |
6.29 |
| 2026-08-07 00:00 |
11:31:27.80 |
-57:08:20.7 |
HIP 56153 |
7.09 |
| 2026-08-07 12:00 |
11:31:33.87 |
-57:08:05.6 |
HIP 56153 |
7.90 |
| 2026-08-08 00:00 |
11:31:39.98 |
-57:07:50.9 |
HIP 56153 |
8.73 |
| 2026-08-08 12:00 |
11:31:46.12 |
-57:07:36.7 |
HIP 56153 |
9.58 |
| 2026-08-09 00:00 |
11:31:52.29 |
-57:07:22.9 |
HIP 56153 |
10.42 |
| 2026-08-09 12:00 |
11:31:58.50 |
-57:07:09.6 |
HIP 56153 |
11.28 |
| 2026-08-10 00:00 |
11:32:04.73 |
-57:06:56.6 |
HIP 56153 |
12.14 |
| 2026-08-10 12:00 |
11:32:11.00 |
-57:06:44.2 |
HIP 56153 |
13.01 |
| 2026-08-11 00:00 |
11:32:17.31 |
-57:06:32.2 |
HIP 56153 |
13.88 |
| 2026-08-11 12:00 |
11:32:23.64 |
-57:06:20.6 |
HIP 56153 |
14.76 |
| 2026-08-12 00:00 |
11:32:30.01 |
-57:06:09.5 |
HIP 56153 |
15.64 |
| 2026-08-12 12:00 |
11:32:36.40 |
-57:05:58.8 |
HIP 56153 |
16.52 |
| 2026-08-13 00:00 |
11:32:42.83 |
-57:05:48.5 |
HIP 56465 |
15.99 |
| 2026-08-13 12:00 |
11:32:49.28 |
-57:05:38.8 |
HIP 56465 |
15.17 |
| 2026-08-14 00:00 |
11:32:55.77 |
-57:05:29.4 |
HIP 56465 |
14.35 |
| 2026-08-14 12:00 |
11:33:02.28 |
-57:05:20.6 |
HIP 56465 |
13.54 |
| 2026-08-15 00:00 |
11:33:08.82 |
-57:05:12.1 |
HIP 56465 |
12.74 |
| 2026-08-15 12:00 |
11:33:15.39 |
-57:05:04.2 |
HIP 56465 |
11.94 |
| 2026-08-16 00:00 |
11:33:21.99 |
-57:04:56.7 |
HIP 56465 |
11.15 |
| 2026-08-16 12:00 |
11:33:28.61 |
-57:04:49.6 |
HIP 56465 |
10.37 |
| 2026-08-17 00:00 |
11:33:35.27 |
-57:04:43.0 |
HIP 56465 |
9.60 |
| 2026-08-17 12:00 |
11:33:41.94 |
-57:04:36.8 |
HIP 56465 |
8.86 |
| 2026-08-18 00:00 |
11:33:48.65 |
-57:04:31.1 |
HIP 56465 |
8.15 |
| 2026-08-18 12:00 |
11:33:55.37 |
-57:04:25.9 |
HIP 56465 |
7.47 |
| 2026-08-19 00:00 |
11:34:02.13 |
-57:04:21.1 |
HIP 56465 |
6.84 |