C/1999 S3 (LINEAR)
メタデータ
| 項目 |
値 |
| Designation |
C/1999 S3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-11-09T00:22:32.453760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:01Z |
| Obs used |
638 |
| NEO |
- |
| M1 |
4.800 |
| K1 |
29.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1999-10-24.0000000 |
| e |
0.89996276 |
| q (au) |
1.894944 |
| a (au) |
18.942389 |
| i (deg) |
70.560909 |
| Ω (om, deg) |
11.878195 |
| ω (w, deg) |
44.128165 |
| M (ma, deg) |
359.808532 |
等級
散乱 + 全体線形
$$
M_a = (7.393 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.393 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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 |
12:39:51.29 |
-41:32:37.7 |
HIP 61766 |
12.24 |
| 2026-02-03 12:00 |
12:39:48.80 |
-41:32:59.8 |
HIP 61766 |
11.76 |
| 2026-02-04 00:00 |
12:39:46.28 |
-41:33:21.5 |
HIP 61766 |
11.30 |
| 2026-02-04 12:00 |
12:39:43.72 |
-41:33:43.0 |
HIP 61766 |
10.85 |
| 2026-02-05 00:00 |
12:39:41.13 |
-41:34:04.2 |
HIP 61766 |
10.42 |
| 2026-02-05 12:00 |
12:39:38.51 |
-41:34:25.1 |
HIP 61766 |
10.01 |
| 2026-02-06 00:00 |
12:39:35.85 |
-41:34:45.7 |
HIP 61766 |
9.62 |
| 2026-02-06 12:00 |
12:39:33.16 |
-41:35:06.1 |
HIP 61766 |
9.26 |
| 2026-02-07 00:00 |
12:39:30.43 |
-41:35:26.1 |
HIP 61766 |
8.94 |
| 2026-02-07 12:00 |
12:39:27.67 |
-41:35:45.8 |
HIP 61766 |
8.65 |
| 2026-02-08 00:00 |
12:39:24.88 |
-41:36:05.3 |
HIP 61766 |
8.40 |
| 2026-02-08 12:00 |
12:39:22.06 |
-41:36:24.4 |
HIP 61766 |
8.20 |
| 2026-02-09 00:00 |
12:39:19.20 |
-41:36:43.3 |
HIP 61766 |
8.05 |
| 2026-02-09 12:00 |
12:39:16.31 |
-41:37:01.9 |
HIP 61766 |
7.95 |
| 2026-02-10 00:00 |
12:39:13.39 |
-41:37:20.1 |
HIP 61766 |
7.90 |
| 2026-02-10 12:00 |
12:39:10.43 |
-41:37:38.1 |
HIP 61766 |
7.91 |
| 2026-02-11 00:00 |
12:39:07.44 |
-41:37:55.7 |
HIP 61766 |
7.98 |
| 2026-02-11 12:00 |
12:39:04.43 |
-41:38:13.0 |
HIP 61766 |
8.10 |
| 2026-02-12 00:00 |
12:39:01.38 |
-41:38:30.1 |
HIP 61766 |
8.28 |
| 2026-02-12 12:00 |
12:38:58.30 |
-41:38:46.8 |
HIP 61766 |
8.51 |
| 2026-02-13 00:00 |
12:38:55.18 |
-41:39:03.2 |
HIP 61766 |
8.79 |
| 2026-02-13 12:00 |
12:38:52.04 |
-41:39:19.3 |
HIP 61766 |
9.11 |
| 2026-02-14 00:00 |
12:38:48.87 |
-41:39:35.1 |
HIP 61766 |
9.47 |
| 2026-02-14 12:00 |
12:38:45.67 |
-41:39:50.5 |
HIP 61766 |
9.87 |
| 2026-02-15 00:00 |
12:38:42.43 |
-41:40:05.7 |
HIP 61766 |
10.30 |
| 2026-02-15 12:00 |
12:38:39.17 |
-41:40:20.5 |
HIP 61766 |
10.77 |
| 2026-02-16 00:00 |
12:38:35.88 |
-41:40:35.0 |
HIP 61766 |
11.26 |
| 2026-02-16 12:00 |
12:38:32.56 |
-41:40:49.2 |
HIP 61766 |
11.77 |
| 2026-02-17 00:00 |
12:38:29.21 |
-41:41:03.1 |
HIP 61766 |
12.30 |
| 2026-02-17 12:00 |
12:38:25.83 |
-41:41:16.6 |
HIP 61766 |
12.85 |
| 2026-02-18 00:00 |
12:38:22.42 |
-41:41:29.9 |
HIP 61766 |
13.42 |
| 2026-02-18 12:00 |
12:38:18.98 |
-41:41:42.8 |
HIP 61766 |
14.01 |
| 2026-02-19 00:00 |
12:38:15.52 |
-41:41:55.3 |
HIP 61766 |
14.60 |
| 2026-02-19 12:00 |
12:38:12.03 |
-41:42:07.6 |
HIP 61766 |
15.21 |
| 2026-02-20 00:00 |
12:38:08.51 |
-41:42:19.5 |
HIP 61766 |
15.84 |
| 2026-02-20 12:00 |
12:38:04.97 |
-41:42:31.1 |
HIP 61766 |
16.47 |
| 2026-02-21 00:00 |
12:38:01.39 |
-41:42:42.3 |
HIP 61766 |
17.11 |
| 2026-02-21 12:00 |
12:37:57.80 |
-41:42:53.3 |
HIP 61766 |
17.76 |
| 2026-02-22 00:00 |
12:37:54.17 |
-41:43:03.9 |
HIP 61766 |
18.42 |
| 2026-02-22 12:00 |
12:37:50.52 |
-41:43:14.1 |
HIP 61580 |
18.25 |
| 2026-02-23 00:00 |
12:37:46.85 |
-41:43:24.1 |
HIP 61580 |
17.81 |
| 2026-02-23 12:00 |
12:37:43.15 |
-41:43:33.7 |
HIP 61580 |
17.40 |
| 2026-02-24 00:00 |
12:37:39.42 |
-41:43:42.9 |
HIP 61580 |
17.01 |