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) |
| 2026-05-12 00:00 |
03:20:19.67 |
+09:13:17.0 |
HIP 15572 |
12.03 |
| 2026-05-12 12:00 |
03:20:22.32 |
+09:13:29.1 |
HIP 15572 |
12.01 |
| 2026-05-13 00:00 |
03:20:24.97 |
+09:13:41.0 |
HIP 15572 |
12.02 |
| 2026-05-13 12:00 |
03:20:27.61 |
+09:13:52.9 |
HIP 15572 |
12.08 |
| 2026-05-14 00:00 |
03:20:30.26 |
+09:14:04.7 |
HIP 15572 |
12.17 |
| 2026-05-14 12:00 |
03:20:32.91 |
+09:14:16.5 |
HIP 15572 |
12.29 |
| 2026-05-15 00:00 |
03:20:35.55 |
+09:14:28.2 |
HIP 15572 |
12.45 |
| 2026-05-15 12:00 |
03:20:38.20 |
+09:14:39.8 |
HIP 15572 |
12.65 |
| 2026-05-16 00:00 |
03:20:40.84 |
+09:14:51.4 |
HIP 15572 |
12.87 |
| 2026-05-16 12:00 |
03:20:43.49 |
+09:15:02.9 |
HIP 15572 |
13.13 |
| 2026-05-17 00:00 |
03:20:46.13 |
+09:15:14.4 |
HIP 15572 |
13.42 |
| 2026-05-17 12:00 |
03:20:48.77 |
+09:15:25.8 |
HIP 15572 |
13.73 |
| 2026-05-18 00:00 |
03:20:51.41 |
+09:15:37.1 |
HIP 15572 |
14.06 |
| 2026-05-18 12:00 |
03:20:54.05 |
+09:15:48.3 |
HIP 15572 |
14.42 |
| 2026-05-19 00:00 |
03:20:56.69 |
+09:15:59.5 |
HIP 15572 |
14.80 |
| 2026-05-19 12:00 |
03:20:59.32 |
+09:16:10.6 |
HIP 15572 |
15.20 |
| 2026-05-20 00:00 |
03:21:01.95 |
+09:16:21.6 |
HIP 15572 |
15.62 |
| 2026-05-20 12:00 |
03:21:04.58 |
+09:16:32.6 |
HIP 15572 |
16.05 |
| 2026-05-21 00:00 |
03:21:07.20 |
+09:16:43.5 |
HIP 15572 |
16.50 |
| 2026-05-21 12:00 |
03:21:09.83 |
+09:16:54.3 |
HIP 15572 |
16.96 |
| 2026-05-22 00:00 |
03:21:12.45 |
+09:17:05.0 |
HIP 15572 |
17.44 |
| 2026-05-22 12:00 |
03:21:15.06 |
+09:17:15.7 |
HIP 15572 |
17.92 |
| 2026-05-23 00:00 |
03:21:17.67 |
+09:17:26.3 |
HIP 15572 |
18.42 |
| 2026-05-23 12:00 |
03:21:20.28 |
+09:17:36.8 |
HIP 15572 |
18.92 |
| 2026-05-24 00:00 |
03:21:22.88 |
+09:17:47.3 |
HIP 15572 |
19.44 |
| 2026-05-24 12:00 |
03:21:25.48 |
+09:17:57.6 |
HIP 15572 |
19.96 |
| 2026-05-25 00:00 |
03:21:28.08 |
+09:18:07.9 |
HIP 15572 |
20.48 |
| 2026-05-25 12:00 |
03:21:30.67 |
+09:18:18.2 |
HIP 15572 |
21.01 |
| 2026-05-26 00:00 |
03:21:33.26 |
+09:18:28.3 |
HIP 15630 |
21.48 |
| 2026-05-26 12:00 |
03:21:35.84 |
+09:18:38.4 |
HIP 15630 |
21.44 |
| 2026-05-27 00:00 |
03:21:38.41 |
+09:18:48.3 |
HIP 15630 |
21.42 |
| 2026-05-27 12:00 |
03:21:40.98 |
+09:18:58.3 |
HIP 15630 |
21.43 |
| 2026-05-28 00:00 |
03:21:43.55 |
+09:19:08.1 |
HIP 15630 |
21.45 |
| 2026-05-28 12:00 |
03:21:46.11 |
+09:19:17.8 |
HIP 15630 |
21.50 |
| 2026-05-29 00:00 |
03:21:48.66 |
+09:19:27.5 |
HIP 15630 |
21.56 |
| 2026-05-29 12:00 |
03:21:51.21 |
+09:19:37.1 |
HIP 15630 |
21.65 |
| 2026-05-30 00:00 |
03:21:53.75 |
+09:19:46.6 |
HIP 15630 |
21.75 |
| 2026-05-30 12:00 |
03:21:56.29 |
+09:19:56.0 |
HIP 15630 |
21.87 |
| 2026-05-31 00:00 |
03:21:58.82 |
+09:20:05.3 |
HIP 15630 |
22.02 |
| 2026-05-31 12:00 |
03:22:01.34 |
+09:20:14.6 |
HIP 15630 |
22.18 |
| 2026-06-01 00:00 |
03:22:03.85 |
+09:20:23.8 |
HIP 15630 |
22.36 |
| 2026-06-01 12:00 |
03:22:06.36 |
+09:20:32.9 |
HIP 15630 |
22.55 |
| 2026-06-02 00:00 |
03:22:08.86 |
+09:20:41.9 |
HIP 15630 |
22.76 |