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) |
| 2026-05-12 00:00 |
22:59:41.16 |
-04:01:59.0 |
HIP 113537 |
19.87 |
| 2026-05-12 12:00 |
22:59:42.20 |
-04:01:50.1 |
HIP 113537 |
20.02 |
| 2026-05-13 00:00 |
22:59:43.22 |
-04:01:41.3 |
HIP 113537 |
20.17 |
| 2026-05-13 12:00 |
22:59:44.21 |
-04:01:32.7 |
HIP 113537 |
20.33 |
| 2026-05-14 00:00 |
22:59:45.18 |
-04:01:24.2 |
HIP 113537 |
20.48 |
| 2026-05-14 12:00 |
22:59:46.12 |
-04:01:15.8 |
HIP 113537 |
20.63 |
| 2026-05-15 00:00 |
22:59:47.04 |
-04:01:07.6 |
HIP 113537 |
20.78 |
| 2026-05-15 12:00 |
22:59:47.93 |
-04:00:59.6 |
HIP 113537 |
20.93 |
| 2026-05-16 00:00 |
22:59:48.80 |
-04:00:51.7 |
HIP 113537 |
21.08 |
| 2026-05-16 12:00 |
22:59:49.64 |
-04:00:44.0 |
HIP 113537 |
21.23 |
| 2026-05-17 00:00 |
22:59:50.46 |
-04:00:36.4 |
HIP 113537 |
21.37 |
| 2026-05-17 12:00 |
22:59:51.25 |
-04:00:28.9 |
HIP 113537 |
21.52 |
| 2026-05-18 00:00 |
22:59:52.02 |
-04:00:21.6 |
HIP 113537 |
21.66 |
| 2026-05-18 12:00 |
22:59:52.76 |
-04:00:14.5 |
HIP 113537 |
21.80 |
| 2026-05-19 00:00 |
22:59:53.47 |
-04:00:07.5 |
HIP 113537 |
21.94 |
| 2026-05-19 12:00 |
22:59:54.16 |
-04:00:00.7 |
HIP 113537 |
22.08 |
| 2026-05-20 00:00 |
22:59:54.82 |
-03:59:54.0 |
HIP 113537 |
22.21 |
| 2026-05-20 12:00 |
22:59:55.46 |
-03:59:47.5 |
HIP 113537 |
22.35 |
| 2026-05-21 00:00 |
22:59:56.07 |
-03:59:41.2 |
HIP 113537 |
22.48 |
| 2026-05-21 12:00 |
22:59:56.65 |
-03:59:35.0 |
HIP 113537 |
22.60 |
| 2026-05-22 00:00 |
22:59:57.21 |
-03:59:28.9 |
HIP 113537 |
22.72 |
| 2026-05-22 12:00 |
22:59:57.74 |
-03:59:23.1 |
HIP 113537 |
22.84 |
| 2026-05-23 00:00 |
22:59:58.24 |
-03:59:17.3 |
HIP 113537 |
22.96 |
| 2026-05-23 12:00 |
22:59:58.72 |
-03:59:11.8 |
HIP 113537 |
23.07 |
| 2026-05-24 00:00 |
22:59:59.18 |
-03:59:06.4 |
HIP 113537 |
23.18 |
| 2026-05-24 12:00 |
22:59:59.60 |
-03:59:01.1 |
HIP 113537 |
23.29 |
| 2026-05-25 00:00 |
23:00:00.00 |
-03:58:56.0 |
HIP 113537 |
23.39 |
| 2026-05-25 12:00 |
23:00:00.38 |
-03:58:51.1 |
HIP 113537 |
23.49 |
| 2026-05-26 00:00 |
23:00:00.73 |
-03:58:46.3 |
HIP 113537 |
23.59 |
| 2026-05-26 12:00 |
23:00:01.05 |
-03:58:41.7 |
HIP 113537 |
23.68 |
| 2026-05-27 00:00 |
23:00:01.34 |
-03:58:37.3 |
HIP 113537 |
23.77 |
| 2026-05-27 12:00 |
23:00:01.61 |
-03:58:33.0 |
HIP 113537 |
23.85 |
| 2026-05-28 00:00 |
23:00:01.85 |
-03:58:28.9 |
HIP 113537 |
23.93 |
| 2026-05-28 12:00 |
23:00:02.07 |
-03:58:24.9 |
HIP 113537 |
24.01 |
| 2026-05-29 00:00 |
23:00:02.25 |
-03:58:21.1 |
HIP 113537 |
24.08 |
| 2026-05-29 12:00 |
23:00:02.41 |
-03:58:17.5 |
HIP 113537 |
24.15 |
| 2026-05-30 00:00 |
23:00:02.55 |
-03:58:14.0 |
HIP 113537 |
24.21 |
| 2026-05-30 12:00 |
23:00:02.66 |
-03:58:10.7 |
HIP 113537 |
24.27 |
| 2026-05-31 00:00 |
23:00:02.74 |
-03:58:07.6 |
HIP 113537 |
24.33 |
| 2026-05-31 12:00 |
23:00:02.79 |
-03:58:04.6 |
HIP 113537 |
24.38 |
| 2026-06-01 00:00 |
23:00:02.82 |
-03:58:01.8 |
HIP 113537 |
24.43 |
| 2026-06-01 12:00 |
23:00:02.82 |
-03:57:59.1 |
HIP 113537 |
24.47 |
| 2026-06-02 00:00 |
23:00:02.80 |
-03:57:56.6 |
HIP 113537 |
24.51 |