메타데이터
| 항목 |
값 |
| Designation |
C/2005 J2 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-04-04T06:52:12.155520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-16T12:11:39Z |
| Obs used |
65 |
| NEO |
- |
| M1 |
9.000 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2005-05-25.0000000 |
| e |
1.00000000 |
| q (au) |
4.287489 |
| a (au) |
-433338614767.913574 |
| i (deg) |
150.803021 |
| Ω (om, deg) |
33.369506 |
| ω (w, deg) |
199.642613 |
| M (ma, deg) |
0.000000 |
밝기
산란 + 전체 선형
$$
M_a = (11.585 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.585 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
03:25:25.50 |
+09:26:58.8 |
HIP 15936 |
14.81 |
| 2026-07-29 12:00 |
03:25:26.14 |
+09:26:56.0 |
HIP 15936 |
14.89 |
| 2026-07-30 00:00 |
03:25:26.76 |
+09:26:53.1 |
HIP 15936 |
14.97 |
| 2026-07-30 12:00 |
03:25:27.35 |
+09:26:50.1 |
HIP 15936 |
15.06 |
| 2026-07-31 00:00 |
03:25:27.92 |
+09:26:46.9 |
HIP 15936 |
15.14 |
| 2026-07-31 12:00 |
03:25:28.46 |
+09:26:43.7 |
HIP 15936 |
15.23 |
| 2026-08-01 00:00 |
03:25:28.98 |
+09:26:40.4 |
HIP 15936 |
15.31 |
| 2026-08-01 12:00 |
03:25:29.48 |
+09:26:36.9 |
HIP 15936 |
15.40 |
| 2026-08-02 00:00 |
03:25:29.96 |
+09:26:33.4 |
HIP 15936 |
15.49 |
| 2026-08-02 12:00 |
03:25:30.41 |
+09:26:29.7 |
HIP 15936 |
15.58 |
| 2026-08-03 00:00 |
03:25:30.84 |
+09:26:26.0 |
HIP 15936 |
15.67 |
| 2026-08-03 12:00 |
03:25:31.24 |
+09:26:22.1 |
HIP 15936 |
15.76 |
| 2026-08-04 00:00 |
03:25:31.62 |
+09:26:18.1 |
HIP 15936 |
15.85 |
| 2026-08-04 12:00 |
03:25:31.98 |
+09:26:14.0 |
HIP 15936 |
15.94 |
| 2026-08-05 00:00 |
03:25:32.31 |
+09:26:09.9 |
HIP 15936 |
16.03 |
| 2026-08-05 12:00 |
03:25:32.62 |
+09:26:05.6 |
HIP 15936 |
16.12 |
| 2026-08-06 00:00 |
03:25:32.91 |
+09:26:01.2 |
HIP 15936 |
16.21 |
| 2026-08-06 12:00 |
03:25:33.17 |
+09:25:56.7 |
HIP 15936 |
16.30 |
| 2026-08-07 00:00 |
03:25:33.41 |
+09:25:52.1 |
HIP 15936 |
16.39 |
| 2026-08-07 12:00 |
03:25:33.62 |
+09:25:47.4 |
HIP 15936 |
16.48 |
| 2026-08-08 00:00 |
03:25:33.81 |
+09:25:42.6 |
HIP 15936 |
16.57 |
| 2026-08-08 12:00 |
03:25:33.97 |
+09:25:37.7 |
HIP 15936 |
16.66 |
| 2026-08-09 00:00 |
03:25:34.11 |
+09:25:32.7 |
HIP 15936 |
16.75 |
| 2026-08-09 12:00 |
03:25:34.23 |
+09:25:27.6 |
HIP 15936 |
16.84 |
| 2026-08-10 00:00 |
03:25:34.32 |
+09:25:22.4 |
HIP 15936 |
16.93 |
| 2026-08-10 12:00 |
03:25:34.39 |
+09:25:17.1 |
HIP 15936 |
17.02 |
| 2026-08-11 00:00 |
03:25:34.43 |
+09:25:11.7 |
HIP 15936 |
17.11 |
| 2026-08-11 12:00 |
03:25:34.44 |
+09:25:06.2 |
HIP 15936 |
17.20 |
| 2026-08-12 00:00 |
03:25:34.44 |
+09:25:00.5 |
HIP 15936 |
17.29 |
| 2026-08-12 12:00 |
03:25:34.40 |
+09:24:54.8 |
HIP 15936 |
17.38 |
| 2026-08-13 00:00 |
03:25:34.35 |
+09:24:49.0 |
HIP 15936 |
17.46 |
| 2026-08-13 12:00 |
03:25:34.27 |
+09:24:43.1 |
HIP 15936 |
17.55 |
| 2026-08-14 00:00 |
03:25:34.16 |
+09:24:37.1 |
HIP 15936 |
17.64 |
| 2026-08-14 12:00 |
03:25:34.03 |
+09:24:31.0 |
HIP 15936 |
17.73 |
| 2026-08-15 00:00 |
03:25:33.87 |
+09:24:24.8 |
HIP 15936 |
17.82 |
| 2026-08-15 12:00 |
03:25:33.69 |
+09:24:18.5 |
HIP 15936 |
17.90 |
| 2026-08-16 00:00 |
03:25:33.48 |
+09:24:12.1 |
HIP 15936 |
17.99 |
| 2026-08-16 12:00 |
03:25:33.25 |
+09:24:05.6 |
HIP 15936 |
18.08 |
| 2026-08-17 00:00 |
03:25:32.99 |
+09:23:59.0 |
HIP 15936 |
18.17 |
| 2026-08-17 12:00 |
03:25:32.71 |
+09:23:52.3 |
HIP 15936 |
18.26 |
| 2026-08-18 00:00 |
03:25:32.41 |
+09:23:45.6 |
HIP 15936 |
18.35 |
| 2026-08-18 12:00 |
03:25:32.08 |
+09:23:38.7 |
HIP 15936 |
18.43 |
| 2026-08-19 00:00 |
03:25:31.72 |
+09:23:31.7 |
HIP 15936 |
18.53 |