메타데이터
| 항목 |
값 |
| Designation |
C/2013 G5 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-09-01T12:06:25.499520Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:04Z |
| Obs used |
114 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
11.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-04-23.0000000 |
| e |
0.99971461 |
| q (au) |
0.928919 |
| a (au) |
3254.937233 |
| i (deg) |
40.613476 |
| Ω (om, deg) |
144.282160 |
| ω (w, deg) |
165.667285 |
| M (ma, deg) |
359.999302 |
밝기
산란 + 전체 선형
$$
M_a = (15.455 + 2.768\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.455 |
| n |
2.768 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
07:30:31.61 |
-00:27:45.6 |
HIP 36495 |
10.06 |
| 2026-03-26 12:00 |
07:30:30.66 |
-00:27:19.8 |
HIP 36495 |
10.49 |
| 2026-03-27 00:00 |
07:30:29.75 |
-00:26:54.0 |
HIP 36495 |
10.92 |
| 2026-03-27 12:00 |
07:30:28.87 |
-00:26:28.2 |
HIP 36495 |
11.36 |
| 2026-03-28 00:00 |
07:30:28.03 |
-00:26:02.5 |
HIP 36495 |
11.79 |
| 2026-03-28 12:00 |
07:30:27.22 |
-00:25:36.9 |
HIP 36495 |
12.23 |
| 2026-03-29 00:00 |
07:30:26.44 |
-00:25:11.2 |
HIP 36495 |
12.67 |
| 2026-03-29 12:00 |
07:30:25.70 |
-00:24:45.6 |
HIP 36495 |
13.12 |
| 2026-03-30 00:00 |
07:30:25.00 |
-00:24:20.1 |
HIP 36495 |
13.56 |
| 2026-03-30 12:00 |
07:30:24.32 |
-00:23:54.6 |
HIP 36495 |
14.00 |
| 2026-03-31 00:00 |
07:30:23.69 |
-00:23:29.2 |
HIP 36495 |
14.44 |
| 2026-03-31 12:00 |
07:30:23.08 |
-00:23:03.8 |
HIP 36495 |
14.88 |
| 2026-04-01 00:00 |
07:30:22.51 |
-00:22:38.5 |
HIP 36495 |
15.31 |
| 2026-04-01 12:00 |
07:30:21.97 |
-00:22:13.2 |
HIP 36495 |
15.75 |
| 2026-04-02 00:00 |
07:30:21.47 |
-00:21:48.0 |
HIP 36495 |
16.18 |
| 2026-04-02 12:00 |
07:30:21.00 |
-00:21:22.9 |
HIP 36495 |
16.61 |
| 2026-04-03 00:00 |
07:30:20.57 |
-00:20:57.8 |
HIP 36495 |
17.04 |
| 2026-04-03 12:00 |
07:30:20.17 |
-00:20:32.8 |
HIP 36495 |
17.47 |
| 2026-04-04 00:00 |
07:30:19.81 |
-00:20:07.8 |
HIP 36495 |
17.90 |
| 2026-04-04 12:00 |
07:30:19.47 |
-00:19:42.9 |
HIP 36495 |
18.32 |
| 2026-04-05 00:00 |
07:30:19.18 |
-00:19:18.1 |
HIP 36495 |
18.74 |
| 2026-04-05 12:00 |
07:30:18.91 |
-00:18:53.3 |
HIP 36495 |
19.16 |
| 2026-04-06 00:00 |
07:30:18.69 |
-00:18:28.6 |
HIP 36495 |
19.57 |
| 2026-04-06 12:00 |
07:30:18.49 |
-00:18:04.0 |
HIP 36495 |
19.99 |
| 2026-04-07 00:00 |
07:30:18.33 |
-00:17:39.4 |
HIP 36495 |
20.40 |
| 2026-04-07 12:00 |
07:30:18.20 |
-00:17:15.0 |
HIP 36495 |
20.80 |
| 2026-04-08 00:00 |
07:30:18.11 |
-00:16:50.6 |
HIP 36495 |
21.21 |
| 2026-04-08 12:00 |
07:30:18.05 |
-00:16:26.2 |
HIP 36495 |
21.61 |
| 2026-04-09 00:00 |
07:30:18.03 |
-00:16:02.0 |
HIP 36495 |
22.01 |
| 2026-04-09 12:00 |
07:30:18.04 |
-00:15:37.8 |
HIP 36495 |
22.41 |
| 2026-04-10 00:00 |
07:30:18.08 |
-00:15:13.8 |
HIP 36495 |
22.81 |
| 2026-04-10 12:00 |
07:30:18.16 |
-00:14:49.8 |
HIP 36495 |
23.20 |
| 2026-04-11 00:00 |
07:30:18.27 |
-00:14:25.9 |
HIP 36495 |
23.59 |
| 2026-04-11 12:00 |
07:30:18.42 |
-00:14:02.1 |
HIP 36495 |
23.98 |
| 2026-04-12 00:00 |
07:30:18.60 |
-00:13:38.3 |
HIP 36495 |
24.37 |
| 2026-04-12 12:00 |
07:30:18.81 |
-00:13:14.7 |
HIP 36538 |
24.56 |
| 2026-04-13 00:00 |
07:30:19.06 |
-00:12:51.2 |
HIP 36538 |
24.18 |
| 2026-04-13 12:00 |
07:30:19.34 |
-00:12:27.7 |
HIP 36538 |
23.79 |
| 2026-04-14 00:00 |
07:30:19.66 |
-00:12:04.4 |
HIP 36538 |
23.40 |
| 2026-04-14 12:00 |
07:30:20.01 |
-00:11:41.1 |
HIP 36538 |
23.01 |
| 2026-04-15 00:00 |
07:30:20.39 |
-00:11:18.0 |
HIP 36538 |
22.62 |
| 2026-04-15 12:00 |
07:30:20.80 |
-00:10:54.9 |
HIP 36538 |
22.23 |
| 2026-04-16 00:00 |
07:30:21.25 |
-00:10:31.9 |
HIP 36538 |
21.83 |