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
$$
M_a = (14.835 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.835 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.701 |
| k |
0.800 |
| δ90 |
8.918 |
| 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 |
22:07:20.41 |
-45:27:55.1 |
HIP 109166 |
7.48 |
| 2026-05-12 12:00 |
22:07:20.70 |
-45:28:19.9 |
HIP 109166 |
7.77 |
| 2026-05-13 00:00 |
22:07:20.96 |
-45:28:44.9 |
HIP 109166 |
8.07 |
| 2026-05-13 12:00 |
22:07:21.17 |
-45:29:10.0 |
HIP 109166 |
8.38 |
| 2026-05-14 00:00 |
22:07:21.36 |
-45:29:35.3 |
HIP 109166 |
8.69 |
| 2026-05-14 12:00 |
22:07:21.51 |
-45:30:00.7 |
HIP 109166 |
9.01 |
| 2026-05-15 00:00 |
22:07:21.62 |
-45:30:26.3 |
HIP 109166 |
9.33 |
| 2026-05-15 12:00 |
22:07:21.70 |
-45:30:52.0 |
HIP 109166 |
9.66 |
| 2026-05-16 00:00 |
22:07:21.75 |
-45:31:17.8 |
HIP 109166 |
10.00 |
| 2026-05-16 12:00 |
22:07:21.75 |
-45:31:43.8 |
HIP 109166 |
10.34 |
| 2026-05-17 00:00 |
22:07:21.73 |
-45:32:10.0 |
HIP 109166 |
10.69 |
| 2026-05-17 12:00 |
22:07:21.67 |
-45:32:36.3 |
HIP 109166 |
11.04 |
| 2026-05-18 00:00 |
22:07:21.57 |
-45:33:02.7 |
HIP 109166 |
11.40 |
| 2026-05-18 12:00 |
22:07:21.44 |
-45:33:29.2 |
HIP 109166 |
11.76 |
| 2026-05-19 00:00 |
22:07:21.27 |
-45:33:55.9 |
HIP 109166 |
12.12 |
| 2026-05-19 12:00 |
22:07:21.07 |
-45:34:22.7 |
HIP 109166 |
12.49 |
| 2026-05-20 00:00 |
22:07:20.83 |
-45:34:49.7 |
HIP 109166 |
12.86 |
| 2026-05-20 12:00 |
22:07:20.55 |
-45:35:16.7 |
HIP 109166 |
13.24 |
| 2026-05-21 00:00 |
22:07:20.25 |
-45:35:43.9 |
HIP 109166 |
13.62 |
| 2026-05-21 12:00 |
22:07:19.90 |
-45:36:11.2 |
HIP 109166 |
14.00 |
| 2026-05-22 00:00 |
22:07:19.52 |
-45:36:38.6 |
HIP 109166 |
14.39 |
| 2026-05-22 12:00 |
22:07:19.11 |
-45:37:06.2 |
HIP 109166 |
14.78 |
| 2026-05-23 00:00 |
22:07:18.65 |
-45:37:33.9 |
HIP 109166 |
15.18 |
| 2026-05-23 12:00 |
22:07:18.17 |
-45:38:01.6 |
HIP 109166 |
15.58 |
| 2026-05-24 00:00 |
22:07:17.65 |
-45:38:29.5 |
HIP 109166 |
15.98 |
| 2026-05-24 12:00 |
22:07:17.09 |
-45:38:57.5 |
HIP 109166 |
16.38 |
| 2026-05-25 00:00 |
22:07:16.50 |
-45:39:25.6 |
HIP 109166 |
16.79 |
| 2026-05-25 12:00 |
22:07:15.87 |
-45:39:53.8 |
HIP 109166 |
17.21 |
| 2026-05-26 00:00 |
22:07:15.21 |
-45:40:22.2 |
HIP 109166 |
17.62 |
| 2026-05-26 12:00 |
22:07:14.51 |
-45:40:50.6 |
HIP 109166 |
18.04 |
| 2026-05-27 00:00 |
22:07:13.78 |
-45:41:19.1 |
HIP 109166 |
18.46 |
| 2026-05-27 12:00 |
22:07:13.01 |
-45:41:47.7 |
HIP 109166 |
18.89 |
| 2026-05-28 00:00 |
22:07:12.20 |
-45:42:16.4 |
HIP 109166 |
19.32 |
| 2026-05-28 12:00 |
22:07:11.36 |
-45:42:45.2 |
HIP 109166 |
19.75 |
| 2026-05-29 00:00 |
22:07:10.49 |
-45:43:14.1 |
HIP 109166 |
20.19 |
| 2026-05-29 12:00 |
22:07:09.58 |
-45:43:43.1 |
HIP 109166 |
20.63 |
| 2026-05-30 00:00 |
22:07:08.63 |
-45:44:12.2 |
HIP 109166 |
21.07 |
| 2026-05-30 12:00 |
22:07:07.65 |
-45:44:41.3 |
HIP 109166 |
21.52 |
| 2026-05-31 00:00 |
22:07:06.64 |
-45:45:10.6 |
HIP 109166 |
21.97 |
| 2026-05-31 12:00 |
22:07:05.59 |
-45:45:39.9 |
HIP 109166 |
22.42 |
| 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 |