C/2009 S3 (Lemmon)
メタデータ
| 項目 |
値 |
| Designation |
C/2009 S3 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-12-11T06:01:00.886080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:34Z |
| Obs used |
278 |
| NEO |
- |
| M1 |
11.700 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-11-26.0000000 |
| e |
1.00141917 |
| q (au) |
6.474515 |
| a (au) |
-4562.197370 |
| i (deg) |
60.384601 |
| Ω (om, deg) |
225.132530 |
| ω (w, deg) |
129.760860 |
| M (ma, deg) |
-0.000049 |
等級
散乱 + 全体線形
$$
M_a = (3.790 + 4.922\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.790 |
| n |
4.922 |
| gf |
0.989 |
| gb |
-0.699 |
| 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) |
| 2026-02-03 00:00 |
06:26:03.73 |
-34:04:15.3 |
HIP 30658 |
16.00 |
| 2026-02-03 12:00 |
06:26:00.13 |
-34:03:44.8 |
HIP 30658 |
15.84 |
| 2026-02-04 00:00 |
06:25:56.56 |
-34:03:13.8 |
HIP 30658 |
15.73 |
| 2026-02-04 12:00 |
06:25:53.01 |
-34:02:42.6 |
HIP 30658 |
15.66 |
| 2026-02-05 00:00 |
06:25:49.50 |
-34:02:10.9 |
HIP 30658 |
15.63 |
| 2026-02-05 12:00 |
06:25:46.02 |
-34:01:38.9 |
HIP 30658 |
15.65 |
| 2026-02-06 00:00 |
06:25:42.57 |
-34:01:06.5 |
HIP 30658 |
15.71 |
| 2026-02-06 12:00 |
06:25:39.16 |
-34:00:33.8 |
HIP 30658 |
15.81 |
| 2026-02-07 00:00 |
06:25:35.77 |
-34:00:00.8 |
HIP 30658 |
15.95 |
| 2026-02-07 12:00 |
06:25:32.42 |
-33:59:27.4 |
HIP 30658 |
16.13 |
| 2026-02-08 00:00 |
06:25:29.10 |
-33:58:53.6 |
HIP 30658 |
16.35 |
| 2026-02-08 12:00 |
06:25:25.82 |
-33:58:19.5 |
HIP 30658 |
16.60 |
| 2026-02-09 00:00 |
06:25:22.56 |
-33:57:45.1 |
HIP 30658 |
16.89 |
| 2026-02-09 12:00 |
06:25:19.35 |
-33:57:10.4 |
HIP 30658 |
17.21 |
| 2026-02-10 00:00 |
06:25:16.16 |
-33:56:35.3 |
HIP 30658 |
17.57 |
| 2026-02-10 12:00 |
06:25:13.01 |
-33:56:00.0 |
HIP 30658 |
17.95 |
| 2026-02-11 00:00 |
06:25:09.89 |
-33:55:24.2 |
HIP 30658 |
18.35 |
| 2026-02-11 12:00 |
06:25:06.81 |
-33:54:48.2 |
HIP 30658 |
18.78 |
| 2026-02-12 00:00 |
06:25:03.76 |
-33:54:11.9 |
HIP 30658 |
19.23 |
| 2026-02-12 12:00 |
06:25:00.75 |
-33:53:35.2 |
HIP 30658 |
19.71 |
| 2026-02-13 00:00 |
06:24:57.78 |
-33:52:58.3 |
HIP 30658 |
20.20 |
| 2026-02-13 12:00 |
06:24:54.84 |
-33:52:21.0 |
HIP 30658 |
20.71 |
| 2026-02-14 00:00 |
06:24:51.93 |
-33:51:43.4 |
HIP 30658 |
21.23 |
| 2026-02-14 12:00 |
06:24:49.07 |
-33:51:05.6 |
HIP 30658 |
21.77 |
| 2026-02-15 00:00 |
06:24:46.24 |
-33:50:27.5 |
HIP 30424 |
21.14 |
| 2026-02-15 12:00 |
06:24:43.44 |
-33:49:49.0 |
HIP 30424 |
20.28 |
| 2026-02-16 00:00 |
06:24:40.69 |
-33:49:10.3 |
HIP 30424 |
19.42 |
| 2026-02-16 12:00 |
06:24:37.97 |
-33:48:31.3 |
HIP 30424 |
18.57 |
| 2026-02-17 00:00 |
06:24:35.29 |
-33:47:52.1 |
HIP 30424 |
17.71 |
| 2026-02-17 12:00 |
06:24:32.64 |
-33:47:12.5 |
HIP 30424 |
16.86 |
| 2026-02-18 00:00 |
06:24:30.04 |
-33:46:32.7 |
HIP 30424 |
16.01 |
| 2026-02-18 12:00 |
06:24:27.47 |
-33:45:52.7 |
HIP 30424 |
15.16 |
| 2026-02-19 00:00 |
06:24:24.94 |
-33:45:12.4 |
HIP 30424 |
14.31 |
| 2026-02-19 12:00 |
06:24:22.46 |
-33:44:31.8 |
HIP 30424 |
13.46 |
| 2026-02-20 00:00 |
06:24:20.01 |
-33:43:51.0 |
HIP 30424 |
12.61 |
| 2026-02-20 12:00 |
06:24:17.59 |
-33:43:09.9 |
HIP 30424 |
11.77 |
| 2026-02-21 00:00 |
06:24:15.22 |
-33:42:28.6 |
HIP 30424 |
10.92 |
| 2026-02-21 12:00 |
06:24:12.89 |
-33:41:47.0 |
HIP 30424 |
10.08 |
| 2026-02-22 00:00 |
06:24:10.60 |
-33:41:05.3 |
HIP 30424 |
9.23 |
| 2026-02-22 12:00 |
06:24:08.35 |
-33:40:23.3 |
HIP 30424 |
8.39 |
| 2026-02-23 00:00 |
06:24:06.13 |
-33:39:41.0 |
HIP 30424 |
7.55 |
| 2026-02-23 12:00 |
06:24:03.96 |
-33:38:58.6 |
HIP 30424 |
6.71 |
| 2026-02-24 00:00 |
06:24:01.83 |
-33:38:15.9 |
HIP 30424 |
5.88 |