메타데이터
| 항목 |
값 |
| Designation |
C/2006 A2 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-05-20T02:43:40.612800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
89 |
| NEO |
- |
| M1 |
12.600 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2006-03-18.0000000 |
| e |
0.99862239 |
| q (au) |
5.315949 |
| a (au) |
3858.814166 |
| i (deg) |
148.322579 |
| Ω (om, deg) |
233.225358 |
| ω (w, deg) |
141.018293 |
| M (ma, deg) |
0.001241 |
밝기
산란 + 전체 선형
$$
M_a = (14.845 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.845 |
| n |
2.000 |
| gf |
0.992 |
| gb |
-0.701 |
| k |
0.800 |
| δ90 |
9.994 |
| 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) |
| 2026-06-01 00:00 |
22:07:04.50 |
-45:46:09.3 |
HIP 109166 |
22.88 |
| 2026-06-01 12:00 |
22:07:03.38 |
-45:46:38.8 |
HIP 109166 |
23.34 |
| 2026-06-02 00:00 |
22:07:02.23 |
-45:47:08.4 |
HIP 109136 |
23.02 |
| 2026-06-02 12:00 |
22:07:01.04 |
-45:47:38.0 |
HIP 109136 |
22.49 |
| 2026-06-03 00:00 |
22:06:59.81 |
-45:48:07.7 |
HIP 109136 |
21.95 |
| 2026-06-03 12:00 |
22:06:58.55 |
-45:48:37.5 |
HIP 109136 |
21.41 |
| 2026-06-04 00:00 |
22:06:57.26 |
-45:49:07.3 |
HIP 109136 |
20.87 |
| 2026-06-04 12:00 |
22:06:55.93 |
-45:49:37.2 |
HIP 109136 |
20.33 |
| 2026-06-05 00:00 |
22:06:54.56 |
-45:50:07.2 |
HIP 109136 |
19.78 |
| 2026-06-05 12:00 |
22:06:53.16 |
-45:50:37.3 |
HIP 109136 |
19.24 |
| 2026-06-06 00:00 |
22:06:51.73 |
-45:51:07.4 |
HIP 109136 |
18.69 |
| 2026-06-06 12:00 |
22:06:50.26 |
-45:51:37.5 |
HIP 109136 |
18.14 |
| 2026-06-07 00:00 |
22:06:48.75 |
-45:52:07.7 |
HIP 109136 |
17.58 |
| 2026-06-07 12:00 |
22:06:47.22 |
-45:52:38.0 |
HIP 109136 |
17.03 |
| 2026-06-08 00:00 |
22:06:45.64 |
-45:53:08.3 |
HIP 109136 |
16.48 |
| 2026-06-08 12:00 |
22:06:44.03 |
-45:53:38.7 |
HIP 109136 |
15.92 |
| 2026-06-09 00:00 |
22:06:42.39 |
-45:54:09.1 |
HIP 109136 |
15.36 |
| 2026-06-09 12:00 |
22:06:40.72 |
-45:54:39.6 |
HIP 109136 |
14.81 |
| 2026-06-10 00:00 |
22:06:39.00 |
-45:55:10.1 |
HIP 109136 |
14.25 |
| 2026-06-10 12:00 |
22:06:37.26 |
-45:55:40.6 |
HIP 109136 |
13.70 |
| 2026-06-11 00:00 |
22:06:35.48 |
-45:56:11.2 |
HIP 109136 |
13.15 |
| 2026-06-11 12:00 |
22:06:33.66 |
-45:56:41.9 |
HIP 109136 |
12.60 |
| 2026-06-12 00:00 |
22:06:31.82 |
-45:57:12.5 |
HIP 109136 |
12.05 |
| 2026-06-12 12:00 |
22:06:29.93 |
-45:57:43.2 |
HIP 109136 |
11.51 |
| 2026-06-13 00:00 |
22:06:28.02 |
-45:58:13.9 |
HIP 109136 |
10.97 |
| 2026-06-13 12:00 |
22:06:26.07 |
-45:58:44.7 |
HIP 109136 |
10.44 |
| 2026-06-14 00:00 |
22:06:24.08 |
-45:59:15.5 |
HIP 109136 |
9.92 |
| 2026-06-14 12:00 |
22:06:22.06 |
-45:59:46.3 |
HIP 109136 |
9.42 |
| 2026-06-15 00:00 |
22:06:20.01 |
-46:00:17.1 |
HIP 109136 |
8.92 |
| 2026-06-15 12:00 |
22:06:17.93 |
-46:00:47.9 |
HIP 109136 |
8.45 |
| 2026-06-16 00:00 |
22:06:15.81 |
-46:01:18.8 |
HIP 109136 |
8.00 |
| 2026-06-16 12:00 |
22:06:13.66 |
-46:01:49.6 |
HIP 109136 |
7.57 |
| 2026-06-17 00:00 |
22:06:11.47 |
-46:02:20.5 |
HIP 109136 |
7.18 |
| 2026-06-17 12:00 |
22:06:09.25 |
-46:02:51.4 |
HIP 109136 |
6.83 |
| 2026-06-18 00:00 |
22:06:07.00 |
-46:03:22.3 |
HIP 109136 |
6.52 |
| 2026-06-18 12:00 |
22:06:04.72 |
-46:03:53.1 |
HIP 109136 |
6.27 |
| 2026-06-19 00:00 |
22:06:02.40 |
-46:04:24.0 |
HIP 109136 |
6.08 |
| 2026-06-19 12:00 |
22:06:00.05 |
-46:04:54.9 |
HIP 109136 |
5.96 |
| 2026-06-20 00:00 |
22:05:57.67 |
-46:05:25.8 |
HIP 109136 |
5.91 |
| 2026-06-20 12:00 |
22:05:55.26 |
-46:05:56.7 |
HIP 109136 |
5.95 |
| 2026-06-21 00:00 |
22:05:52.81 |
-46:06:27.5 |
HIP 109136 |
6.06 |
| 2026-06-21 12:00 |
22:05:50.33 |
-46:06:58.4 |
HIP 109136 |
6.24 |
| 2026-06-22 00:00 |
22:05:47.82 |
-46:07:29.2 |
HIP 109136 |
6.50 |