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) |
| 2026-09-20 00:00 |
22:51:21.02 |
-04:45:34.7 |
HIP 113056 |
36.19 |
| 2026-09-20 12:00 |
22:51:17.68 |
-04:45:55.4 |
HIP 113056 |
37.06 |
| 2026-09-21 00:00 |
22:51:14.35 |
-04:46:16.0 |
HIP 113056 |
37.94 |
| 2026-09-21 12:00 |
22:51:11.03 |
-04:46:36.6 |
HIP 113056 |
38.82 |
| 2026-09-22 00:00 |
22:51:07.72 |
-04:46:57.2 |
HIP 113056 |
39.69 |
| 2026-09-22 12:00 |
22:51:04.42 |
-04:47:17.8 |
HIP 112617 |
40.38 |
| 2026-09-23 00:00 |
22:51:01.13 |
-04:47:38.3 |
HIP 112617 |
39.71 |
| 2026-09-23 12:00 |
22:50:57.85 |
-04:47:58.7 |
HIP 112617 |
39.06 |
| 2026-09-24 00:00 |
22:50:54.58 |
-04:48:19.1 |
HIP 112617 |
38.41 |
| 2026-09-24 12:00 |
22:50:51.31 |
-04:48:39.5 |
HIP 112617 |
37.78 |
| 2026-09-25 00:00 |
22:50:48.06 |
-04:48:59.8 |
HIP 112617 |
37.16 |
| 2026-09-25 12:00 |
22:50:44.82 |
-04:49:20.1 |
HIP 112617 |
36.55 |
| 2026-09-26 00:00 |
22:50:41.59 |
-04:49:40.3 |
HIP 112617 |
35.96 |
| 2026-09-26 12:00 |
22:50:38.37 |
-04:50:00.5 |
HIP 112617 |
35.38 |
| 2026-09-27 00:00 |
22:50:35.17 |
-04:50:20.6 |
HIP 112617 |
34.81 |
| 2026-09-27 12:00 |
22:50:31.97 |
-04:50:40.7 |
HIP 112617 |
34.26 |
| 2026-09-28 00:00 |
22:50:28.79 |
-04:51:00.7 |
HIP 112617 |
33.73 |
| 2026-09-28 12:00 |
22:50:25.61 |
-04:51:20.6 |
HIP 112617 |
33.21 |
| 2026-09-29 00:00 |
22:50:22.45 |
-04:51:40.5 |
HIP 112617 |
32.70 |
| 2026-09-29 12:00 |
22:50:19.31 |
-04:52:00.4 |
HIP 112617 |
32.22 |
| 2026-09-30 00:00 |
22:50:16.17 |
-04:52:20.2 |
HIP 112617 |
31.75 |
| 2026-09-30 12:00 |
22:50:13.05 |
-04:52:39.9 |
HIP 112617 |
31.29 |
| 2026-10-01 00:00 |
22:50:09.94 |
-04:52:59.5 |
HIP 112617 |
30.86 |
| 2026-10-01 12:00 |
22:50:06.85 |
-04:53:19.1 |
HIP 112617 |
30.45 |
| 2026-10-02 00:00 |
22:50:03.77 |
-04:53:38.6 |
HIP 112617 |
30.05 |
| 2026-10-02 12:00 |
22:50:00.70 |
-04:53:58.1 |
HIP 112617 |
29.68 |
| 2026-10-03 00:00 |
22:49:57.65 |
-04:54:17.5 |
HIP 112617 |
29.32 |
| 2026-10-03 12:00 |
22:49:54.61 |
-04:54:36.8 |
HIP 112617 |
28.99 |
| 2026-10-04 00:00 |
22:49:51.58 |
-04:54:56.0 |
HIP 112617 |
28.68 |
| 2026-10-04 12:00 |
22:49:48.57 |
-04:55:15.2 |
HIP 112617 |
28.39 |
| 2026-10-05 00:00 |
22:49:45.58 |
-04:55:34.3 |
HIP 112617 |
28.12 |
| 2026-10-05 12:00 |
22:49:42.60 |
-04:55:53.3 |
HIP 112617 |
27.88 |
| 2026-10-06 00:00 |
22:49:39.63 |
-04:56:12.2 |
HIP 112617 |
27.65 |
| 2026-10-06 12:00 |
22:49:36.68 |
-04:56:31.1 |
HIP 112617 |
27.46 |
| 2026-10-07 00:00 |
22:49:33.75 |
-04:56:49.8 |
HIP 112617 |
27.28 |
| 2026-10-07 12:00 |
22:49:30.84 |
-04:57:08.5 |
HIP 112617 |
27.13 |
| 2026-10-08 00:00 |
22:49:27.94 |
-04:57:27.1 |
HIP 112617 |
27.00 |
| 2026-10-08 12:00 |
22:49:25.05 |
-04:57:45.6 |
HIP 112617 |
26.89 |
| 2026-10-09 00:00 |
22:49:22.19 |
-04:58:04.1 |
HIP 112617 |
26.81 |
| 2026-10-09 12:00 |
22:49:19.34 |
-04:58:22.4 |
HIP 112617 |
26.75 |
| 2026-10-10 00:00 |
22:49:16.51 |
-04:58:40.6 |
HIP 112617 |
26.71 |
| 2026-10-10 12:00 |
22:49:13.69 |
-04:58:58.8 |
HIP 112617 |
26.69 |
| 2026-10-11 00:00 |
22:49:10.90 |
-04:59:16.9 |
HIP 112617 |
26.70 |