메타데이터
| 항목 |
값 |
| Designation |
346P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-08-20T20:43:06.847680Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:55Z |
| Obs used |
553 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
12.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-10-21.0000000 |
| e |
0.50406176 |
| q (au) |
2.222599 |
| a (au) |
4.481605 |
| i (deg) |
22.172168 |
| Ω (om, deg) |
102.556632 |
| ω (w, deg) |
335.762986 |
| M (ma, deg) |
158.127468 |
밝기
산란 + 전체 선형
$$
M_a = (15.872 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.872 |
| n |
2.000 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
02:01:12.85 |
-03:42:30.8 |
HIP 9358 |
25.03 |
| 2026-03-26 12:00 |
02:02:05.04 |
-03:35:38.1 |
HIP 9358 |
30.65 |
| 2026-03-27 00:00 |
02:02:57.32 |
-03:28:45.8 |
HIP 9732 |
33.49 |
| 2026-03-27 12:00 |
02:03:49.68 |
-03:21:53.9 |
HIP 9732 |
22.05 |
| 2026-03-28 00:00 |
02:04:42.14 |
-03:15:02.4 |
HIP 9732 |
16.91 |
| 2026-03-28 12:00 |
02:05:34.68 |
-03:08:11.3 |
HIP 9732 |
22.85 |
| 2026-03-29 00:00 |
02:06:27.30 |
-03:01:20.7 |
HIP 9732 |
34.59 |
| 2026-03-29 12:00 |
02:07:20.02 |
-02:54:30.5 |
HIP 10003 |
28.44 |
| 2026-03-30 00:00 |
02:08:12.82 |
-02:47:40.8 |
HIP 10003 |
26.24 |
| 2026-03-30 12:00 |
02:09:05.70 |
-02:40:51.5 |
HIP 10033 |
20.97 |
| 2026-03-31 00:00 |
02:09:58.68 |
-02:34:02.7 |
HIP 10033 |
18.78 |
| 2026-03-31 12:00 |
02:10:51.74 |
-02:27:14.3 |
HIP 10033 |
26.64 |
| 2026-04-01 00:00 |
02:11:44.89 |
-02:20:26.4 |
HIP 10298 |
15.69 |
| 2026-04-01 12:00 |
02:12:38.12 |
-02:13:39.0 |
HIP 10298 |
0.87 |
| 2026-04-02 00:00 |
02:13:31.44 |
-02:06:52.0 |
HIP 10298 |
14.20 |
| 2026-04-02 12:00 |
02:14:24.84 |
-02:00:05.6 |
HIP 10298 |
29.16 |
| 2026-04-03 00:00 |
02:15:18.34 |
-01:53:19.6 |
HIP 10705 |
38.28 |
| 2026-04-03 12:00 |
02:16:11.91 |
-01:46:34.2 |
HIP 10705 |
28.59 |
| 2026-04-04 00:00 |
02:17:05.58 |
-01:39:49.3 |
HIP 10705 |
24.87 |
| 2026-04-04 12:00 |
02:17:59.33 |
-01:33:04.8 |
HIP 10705 |
29.49 |
| 2026-04-05 00:00 |
02:18:53.16 |
-01:26:20.9 |
HIP 10912 |
25.02 |
| 2026-04-05 12:00 |
02:19:47.08 |
-01:19:37.6 |
HIP 10912 |
17.51 |
| 2026-04-06 00:00 |
02:20:41.09 |
-01:12:54.8 |
HIP 10912 |
20.99 |
| 2026-04-06 12:00 |
02:21:35.18 |
-01:06:12.5 |
HIP 11046 |
16.09 |
| 2026-04-07 00:00 |
02:22:29.35 |
-00:59:30.7 |
HIP 11046 |
7.70 |
| 2026-04-07 12:00 |
02:23:23.62 |
-00:52:49.6 |
HIP 11046 |
17.80 |
| 2026-04-08 00:00 |
02:24:17.96 |
-00:46:09.0 |
HIP 11334 |
27.80 |
| 2026-04-08 12:00 |
02:25:12.40 |
-00:39:29.0 |
HIP 11334 |
24.10 |
| 2026-04-09 00:00 |
02:26:06.91 |
-00:32:49.5 |
HIP 11350 |
22.16 |
| 2026-04-09 12:00 |
02:27:01.52 |
-00:26:10.7 |
HIP 11438 |
20.16 |
| 2026-04-10 00:00 |
02:27:56.20 |
-00:19:32.5 |
HIP 11438 |
26.41 |
| 2026-04-10 12:00 |
02:28:50.98 |
-00:12:54.8 |
HIP 11649 |
22.65 |
| 2026-04-11 00:00 |
02:29:45.83 |
-00:06:17.8 |
HIP 11649 |
7.71 |
| 2026-04-11 12:00 |
02:30:40.77 |
+00:00:18.6 |
HIP 11649 |
8.35 |
| 2026-04-12 00:00 |
02:31:35.80 |
+00:06:54.3 |
HIP 11687 |
15.20 |
| 2026-04-12 12:00 |
02:32:30.91 |
+00:13:29.5 |
HIP 11883 |
12.49 |
| 2026-04-13 00:00 |
02:33:26.10 |
+00:20:03.9 |
HIP 11883 |
12.32 |
| 2026-04-13 12:00 |
02:34:21.38 |
+00:26:37.7 |
HIP 11962 |
4.94 |
| 2026-04-14 00:00 |
02:35:16.74 |
+00:33:10.9 |
HIP 11962 |
17.86 |
| 2026-04-14 12:00 |
02:36:12.18 |
+00:39:43.3 |
HIP 12166 |
13.87 |
| 2026-04-15 00:00 |
02:37:07.71 |
+00:46:15.1 |
HIP 12166 |
17.88 |
| 2026-04-15 12:00 |
02:38:03.32 |
+00:52:46.2 |
HIP 12166 |
30.30 |
| 2026-04-16 00:00 |
02:38:59.01 |
+00:59:16.6 |
HIP 12392 |
24.53 |