メタデータ
| 項目 |
値 |
| 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 |
オスキュレーティング軌道要素
| 項目 |
値 |
| 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 |
等級
散乱 + 全体線形
$$
M_a = (12.846 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.846 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 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 |
| 2026-06-02 12:00 |
23:00:02.74 |
-03:57:54.3 |
HIP 113537 |
24.54 |
| 2026-06-03 00:00 |
23:00:02.66 |
-03:57:52.1 |
HIP 113537 |
24.57 |
| 2026-06-03 12:00 |
23:00:02.56 |
-03:57:50.1 |
HIP 113537 |
24.60 |
| 2026-06-04 00:00 |
23:00:02.42 |
-03:57:48.3 |
HIP 113537 |
24.62 |
| 2026-06-04 12:00 |
23:00:02.26 |
-03:57:46.6 |
HIP 113537 |
24.64 |
| 2026-06-05 00:00 |
23:00:02.08 |
-03:57:45.1 |
HIP 113537 |
24.66 |
| 2026-06-05 12:00 |
23:00:01.86 |
-03:57:43.8 |
HIP 113537 |
24.67 |
| 2026-06-06 00:00 |
23:00:01.62 |
-03:57:42.7 |
HIP 113537 |
24.67 |
| 2026-06-06 12:00 |
23:00:01.35 |
-03:57:41.7 |
HIP 113537 |
24.68 |
| 2026-06-07 00:00 |
23:00:01.06 |
-03:57:40.8 |
HIP 113537 |
24.67 |
| 2026-06-07 12:00 |
23:00:00.73 |
-03:57:40.2 |
HIP 113537 |
24.67 |
| 2026-06-08 00:00 |
23:00:00.39 |
-03:57:39.7 |
HIP 113537 |
24.66 |
| 2026-06-08 12:00 |
23:00:00.01 |
-03:57:39.4 |
HIP 113537 |
24.65 |
| 2026-06-09 00:00 |
22:59:59.60 |
-03:57:39.2 |
HIP 113537 |
24.63 |
| 2026-06-09 12:00 |
22:59:59.17 |
-03:57:39.2 |
HIP 113537 |
24.61 |
| 2026-06-10 00:00 |
22:59:58.72 |
-03:57:39.4 |
HIP 113537 |
24.59 |
| 2026-06-10 12:00 |
22:59:58.23 |
-03:57:39.8 |
HIP 113537 |
24.56 |
| 2026-06-11 00:00 |
22:59:57.72 |
-03:57:40.3 |
HIP 113537 |
24.53 |
| 2026-06-11 12:00 |
22:59:57.18 |
-03:57:41.0 |
HIP 113537 |
24.50 |
| 2026-06-12 00:00 |
22:59:56.61 |
-03:57:41.9 |
HIP 113537 |
24.46 |
| 2026-06-12 12:00 |
22:59:56.02 |
-03:57:42.9 |
HIP 113537 |
24.42 |
| 2026-06-13 00:00 |
22:59:55.39 |
-03:57:44.1 |
HIP 113537 |
24.38 |
| 2026-06-13 12:00 |
22:59:54.75 |
-03:57:45.5 |
HIP 113537 |
24.33 |
| 2026-06-14 00:00 |
22:59:54.07 |
-03:57:47.0 |
HIP 113537 |
24.28 |
| 2026-06-14 12:00 |
22:59:53.37 |
-03:57:48.8 |
HIP 113537 |
24.23 |
| 2026-06-15 00:00 |
22:59:52.64 |
-03:57:50.7 |
HIP 113537 |
24.18 |
| 2026-06-15 12:00 |
22:59:51.88 |
-03:57:52.7 |
HIP 113537 |
24.12 |
| 2026-06-16 00:00 |
22:59:51.10 |
-03:57:55.0 |
HIP 113537 |
24.07 |
| 2026-06-16 12:00 |
22:59:50.28 |
-03:57:57.4 |
HIP 113537 |
24.01 |
| 2026-06-17 00:00 |
22:59:49.45 |
-03:58:00.0 |
HIP 113537 |
23.94 |
| 2026-06-17 12:00 |
22:59:48.58 |
-03:58:02.7 |
HIP 113537 |
23.88 |
| 2026-06-18 00:00 |
22:59:47.69 |
-03:58:05.6 |
HIP 113537 |
23.82 |
| 2026-06-18 12:00 |
22:59:46.77 |
-03:58:08.7 |
HIP 113537 |
23.75 |
| 2026-06-19 00:00 |
22:59:45.82 |
-03:58:12.0 |
HIP 113537 |
23.68 |
| 2026-06-19 12:00 |
22:59:44.85 |
-03:58:15.4 |
HIP 113537 |
23.62 |
| 2026-06-20 00:00 |
22:59:43.85 |
-03:58:19.0 |
HIP 113537 |
23.55 |
| 2026-06-20 12:00 |
22:59:42.82 |
-03:58:22.7 |
HIP 113537 |
23.48 |
| 2026-06-21 00:00 |
22:59:41.77 |
-03:58:26.7 |
HIP 113537 |
23.41 |
| 2026-06-21 12:00 |
22:59:40.69 |
-03:58:30.8 |
HIP 113537 |
23.34 |
| 2026-06-22 00:00 |
22:59:39.59 |
-03:58:35.1 |
HIP 113537 |
23.28 |