메타데이터
| 항목 |
값 |
| Designation |
C/2009 F1 (Larson) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-06-25T21:16:44.184000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:28Z |
| Obs used |
159 |
| NEO |
- |
| M1 |
14.900 |
| K1 |
11.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-03-26.0000000 |
| e |
0.98272497 |
| q (au) |
1.830683 |
| a (au) |
105.972834 |
| i (deg) |
171.375517 |
| Ω (om, deg) |
357.949401 |
| ω (w, deg) |
219.582076 |
| M (ma, deg) |
359.916983 |
밝기
산란 + 전체 선형
$$
M_a = (12.846 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.846 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
22:57:10.60 |
-04:11:10.3 |
HIP 113440 |
27.47 |
| 2026-07-29 12:00 |
22:57:07.80 |
-04:11:25.8 |
HIP 113440 |
27.81 |
| 2026-07-30 00:00 |
22:57:04.97 |
-04:11:41.5 |
HIP 113440 |
28.16 |
| 2026-07-30 12:00 |
22:57:02.14 |
-04:11:57.3 |
HIP 113440 |
28.53 |
| 2026-07-31 00:00 |
22:56:59.28 |
-04:12:13.2 |
HIP 113440 |
28.92 |
| 2026-07-31 12:00 |
22:56:56.41 |
-04:12:29.2 |
HIP 113440 |
29.32 |
| 2026-08-01 00:00 |
22:56:53.52 |
-04:12:45.3 |
HIP 113440 |
29.74 |
| 2026-08-01 12:00 |
22:56:50.62 |
-04:13:01.5 |
HIP 113440 |
30.18 |
| 2026-08-02 00:00 |
22:56:47.70 |
-04:13:17.9 |
HIP 113440 |
30.63 |
| 2026-08-02 12:00 |
22:56:44.76 |
-04:13:34.3 |
HIP 113440 |
31.10 |
| 2026-08-03 00:00 |
22:56:41.81 |
-04:13:50.9 |
HIP 113440 |
31.58 |
| 2026-08-03 12:00 |
22:56:38.85 |
-04:14:07.6 |
HIP 113440 |
32.07 |
| 2026-08-04 00:00 |
22:56:35.87 |
-04:14:24.4 |
HIP 113440 |
32.58 |
| 2026-08-04 12:00 |
22:56:32.87 |
-04:14:41.3 |
HIP 113440 |
33.11 |
| 2026-08-05 00:00 |
22:56:29.86 |
-04:14:58.3 |
HIP 113440 |
33.65 |
| 2026-08-05 12:00 |
22:56:26.83 |
-04:15:15.4 |
HIP 113440 |
34.20 |
| 2026-08-06 00:00 |
22:56:23.79 |
-04:15:32.7 |
HIP 113440 |
34.76 |
| 2026-08-06 12:00 |
22:56:20.74 |
-04:15:50.0 |
HIP 113091 |
34.00 |
| 2026-08-07 00:00 |
22:56:17.67 |
-04:16:07.4 |
HIP 113091 |
33.19 |
| 2026-08-07 12:00 |
22:56:14.59 |
-04:16:24.9 |
HIP 113091 |
32.37 |
| 2026-08-08 00:00 |
22:56:11.49 |
-04:16:42.6 |
HIP 113091 |
31.54 |
| 2026-08-08 12:00 |
22:56:08.38 |
-04:17:00.3 |
HIP 113091 |
30.71 |
| 2026-08-09 00:00 |
22:56:05.26 |
-04:17:18.1 |
HIP 113091 |
29.88 |
| 2026-08-09 12:00 |
22:56:02.12 |
-04:17:36.1 |
HIP 113091 |
29.05 |
| 2026-08-10 00:00 |
22:55:58.98 |
-04:17:54.1 |
HIP 113091 |
28.21 |
| 2026-08-10 12:00 |
22:55:55.81 |
-04:18:12.2 |
HIP 113091 |
27.37 |
| 2026-08-11 00:00 |
22:55:52.64 |
-04:18:30.4 |
HIP 113091 |
26.52 |
| 2026-08-11 12:00 |
22:55:49.46 |
-04:18:48.7 |
HIP 113091 |
25.68 |
| 2026-08-12 00:00 |
22:55:46.26 |
-04:19:07.1 |
HIP 113091 |
24.82 |
| 2026-08-12 12:00 |
22:55:43.05 |
-04:19:25.6 |
HIP 113091 |
23.97 |
| 2026-08-13 00:00 |
22:55:39.83 |
-04:19:44.1 |
HIP 113091 |
23.11 |
| 2026-08-13 12:00 |
22:55:36.60 |
-04:20:02.8 |
HIP 113091 |
22.25 |
| 2026-08-14 00:00 |
22:55:33.36 |
-04:20:21.5 |
HIP 113091 |
21.39 |
| 2026-08-14 12:00 |
22:55:30.11 |
-04:20:40.3 |
HIP 113091 |
20.53 |
| 2026-08-15 00:00 |
22:55:26.85 |
-04:20:59.2 |
HIP 113091 |
19.66 |
| 2026-08-15 12:00 |
22:55:23.57 |
-04:21:18.2 |
HIP 113091 |
18.79 |
| 2026-08-16 00:00 |
22:55:20.29 |
-04:21:37.2 |
HIP 113091 |
17.92 |
| 2026-08-16 12:00 |
22:55:17.00 |
-04:21:56.4 |
HIP 113091 |
17.05 |
| 2026-08-17 00:00 |
22:55:13.70 |
-04:22:15.6 |
HIP 113091 |
16.17 |
| 2026-08-17 12:00 |
22:55:10.39 |
-04:22:34.9 |
HIP 113091 |
15.30 |
| 2026-08-18 00:00 |
22:55:07.07 |
-04:22:54.2 |
HIP 113091 |
14.42 |
| 2026-08-18 12:00 |
22:55:03.74 |
-04:23:13.6 |
HIP 113091 |
13.54 |
| 2026-08-19 00:00 |
22:55:00.41 |
-04:23:33.1 |
HIP 113091 |
12.66 |