C/2009 O2 (Catalina)
메타데이터
| 항목 |
값 |
| Designation |
C/2009 O2 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-03-24T09:57:09.682560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:31Z |
| Obs used |
281 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
7.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-10-31.0000000 |
| e |
0.99749905 |
| q (au) |
0.695547 |
| a (au) |
278.112822 |
| i (deg) |
107.960453 |
| Ω (om, deg) |
310.232085 |
| ω (w, deg) |
133.397136 |
| M (ma, deg) |
359.969311 |
밝기
산란 + 전체 선형
$$
M_a = (14.631 + 3.055\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.631 |
| n |
3.055 |
| gf |
0.800 |
| gb |
-0.619 |
| k |
0.800 |
| δ90 |
9.999 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2009-03-10 |
2009-07-30 |
-77.4381 |
+43.845 |
| 2009-07-30 |
2009-12-03 |
+12.4136 |
-6.726 |
| 2009-12-03 |
2010-03-24 |
-7.2272 |
-1.412 |
| 2010-03-26 |
2010-04-16 |
-88.5728 |
-12.010 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
01:04:51.64 |
-57:10:44.0 |
HIP 5053 |
2.22 |
| 2026-02-03 12:00 |
01:04:54.04 |
-57:09:58.1 |
HIP 5053 |
2.05 |
| 2026-02-04 00:00 |
01:04:56.48 |
-57:09:12.4 |
HIP 5053 |
2.21 |
| 2026-02-04 12:00 |
01:04:58.97 |
-57:08:26.7 |
HIP 5053 |
2.63 |
| 2026-02-05 00:00 |
01:05:01.49 |
-57:07:41.2 |
HIP 5053 |
3.23 |
| 2026-02-05 12:00 |
01:05:04.06 |
-57:06:55.9 |
HIP 5053 |
3.91 |
| 2026-02-06 00:00 |
01:05:06.68 |
-57:06:10.6 |
HIP 5053 |
4.65 |
| 2026-02-06 12:00 |
01:05:09.33 |
-57:05:25.5 |
HIP 5053 |
5.42 |
| 2026-02-07 00:00 |
01:05:12.03 |
-57:04:40.5 |
HIP 5053 |
6.21 |
| 2026-02-07 12:00 |
01:05:14.77 |
-57:03:55.7 |
HIP 5053 |
7.01 |
| 2026-02-08 00:00 |
01:05:17.54 |
-57:03:11.0 |
HIP 5053 |
7.82 |
| 2026-02-08 12:00 |
01:05:20.37 |
-57:02:26.5 |
HIP 5053 |
8.63 |
| 2026-02-09 00:00 |
01:05:23.23 |
-57:01:42.1 |
HIP 5053 |
9.45 |
| 2026-02-09 12:00 |
01:05:26.13 |
-57:00:57.9 |
HIP 5053 |
10.28 |
| 2026-02-10 00:00 |
01:05:29.07 |
-57:00:13.8 |
HIP 5053 |
11.11 |
| 2026-02-10 12:00 |
01:05:32.06 |
-56:59:29.9 |
HIP 5053 |
11.94 |
| 2026-02-11 00:00 |
01:05:35.08 |
-56:58:46.2 |
HIP 5178 |
11.93 |
| 2026-02-11 12:00 |
01:05:38.14 |
-56:58:02.6 |
HIP 5178 |
11.09 |
| 2026-02-12 00:00 |
01:05:41.25 |
-56:57:19.2 |
HIP 5178 |
10.26 |
| 2026-02-12 12:00 |
01:05:44.39 |
-56:56:35.9 |
HIP 5178 |
9.42 |
| 2026-02-13 00:00 |
01:05:47.57 |
-56:55:52.9 |
HIP 5178 |
8.59 |
| 2026-02-13 12:00 |
01:05:50.79 |
-56:55:10.0 |
HIP 5178 |
7.76 |
| 2026-02-14 00:00 |
01:05:54.04 |
-56:54:27.3 |
HIP 5178 |
6.93 |
| 2026-02-14 12:00 |
01:05:57.34 |
-56:53:44.8 |
HIP 5178 |
6.11 |
| 2026-02-15 00:00 |
01:06:00.67 |
-56:53:02.5 |
HIP 5178 |
5.29 |
| 2026-02-15 12:00 |
01:06:04.04 |
-56:52:20.3 |
HIP 5178 |
4.49 |
| 2026-02-16 00:00 |
01:06:07.45 |
-56:51:38.4 |
HIP 5178 |
3.70 |
| 2026-02-16 12:00 |
01:06:10.89 |
-56:50:56.6 |
HIP 5178 |
2.94 |
| 2026-02-17 00:00 |
01:06:14.37 |
-56:50:15.1 |
HIP 5178 |
2.24 |
| 2026-02-17 12:00 |
01:06:17.89 |
-56:49:33.8 |
HIP 5178 |
1.68 |
| 2026-02-18 00:00 |
01:06:21.44 |
-56:48:52.6 |
HIP 5178 |
1.44 |
| 2026-02-18 12:00 |
01:06:25.03 |
-56:48:11.7 |
HIP 5178 |
1.66 |
| 2026-02-19 00:00 |
01:06:28.65 |
-56:47:31.0 |
HIP 5178 |
2.21 |
| 2026-02-19 12:00 |
01:06:32.31 |
-56:46:50.5 |
HIP 5178 |
2.90 |
| 2026-02-20 00:00 |
01:06:36.00 |
-56:46:10.2 |
HIP 5178 |
3.66 |
| 2026-02-20 12:00 |
01:06:39.73 |
-56:45:30.2 |
HIP 5178 |
4.45 |
| 2026-02-21 00:00 |
01:06:43.49 |
-56:44:50.3 |
HIP 5178 |
5.26 |
| 2026-02-21 12:00 |
01:06:47.28 |
-56:44:10.7 |
HIP 5178 |
6.07 |
| 2026-02-22 00:00 |
01:06:51.11 |
-56:43:31.3 |
HIP 5178 |
6.90 |
| 2026-02-22 12:00 |
01:06:54.97 |
-56:42:52.2 |
HIP 5178 |
7.73 |
| 2026-02-23 00:00 |
01:06:58.86 |
-56:42:13.2 |
HIP 5178 |
8.56 |
| 2026-02-23 12:00 |
01:07:02.78 |
-56:41:34.6 |
HIP 5178 |
9.39 |
| 2026-02-24 00:00 |
01:07:06.74 |
-56:40:56.1 |
HIP 5178 |
10.23 |