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 |
-0.500 |
| 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) |
| 2026-09-20 00:00 |
12:30:55.28 |
-39:46:23.9 |
HIP 60935 |
19.43 |
| 2026-09-20 12:00 |
12:30:59.38 |
-39:46:37.7 |
HIP 60935 |
20.25 |
| 2026-09-21 00:00 |
12:31:03.48 |
-39:46:51.7 |
HIP 60935 |
21.07 |
| 2026-09-21 12:00 |
12:31:07.59 |
-39:47:06.0 |
HIP 60935 |
21.89 |
| 2026-09-22 00:00 |
12:31:11.70 |
-39:47:20.6 |
HIP 60935 |
22.72 |
| 2026-09-22 12:00 |
12:31:15.83 |
-39:47:35.5 |
HIP 60935 |
23.54 |
| 2026-09-23 00:00 |
12:31:19.95 |
-39:47:50.6 |
HIP 60935 |
24.38 |
| 2026-09-23 12:00 |
12:31:24.08 |
-39:48:06.0 |
HIP 60935 |
25.21 |
| 2026-09-24 00:00 |
12:31:28.22 |
-39:48:21.7 |
HIP 60935 |
26.04 |
| 2026-09-24 12:00 |
12:31:32.36 |
-39:48:37.6 |
HIP 60935 |
26.88 |
| 2026-09-25 00:00 |
12:31:36.50 |
-39:48:53.8 |
HIP 61111 |
27.61 |
| 2026-09-25 12:00 |
12:31:40.65 |
-39:49:10.3 |
HIP 61111 |
27.38 |
| 2026-09-26 00:00 |
12:31:44.81 |
-39:49:27.1 |
HIP 61111 |
27.18 |
| 2026-09-26 12:00 |
12:31:48.96 |
-39:49:44.1 |
HIP 61111 |
27.00 |
| 2026-09-27 00:00 |
12:31:53.12 |
-39:50:01.4 |
HIP 61111 |
26.84 |
| 2026-09-27 12:00 |
12:31:57.28 |
-39:50:18.9 |
HIP 61111 |
26.70 |
| 2026-09-28 00:00 |
12:32:01.45 |
-39:50:36.7 |
HIP 61111 |
26.58 |
| 2026-09-28 12:00 |
12:32:05.62 |
-39:50:54.8 |
HIP 61111 |
26.49 |
| 2026-09-29 00:00 |
12:32:09.79 |
-39:51:13.1 |
HIP 61111 |
26.42 |
| 2026-09-29 12:00 |
12:32:13.96 |
-39:51:31.7 |
HIP 61111 |
26.37 |
| 2026-09-30 00:00 |
12:32:18.13 |
-39:51:50.6 |
HIP 61111 |
26.34 |
| 2026-09-30 12:00 |
12:32:22.31 |
-39:52:09.7 |
HIP 61111 |
26.34 |
| 2026-10-01 00:00 |
12:32:26.48 |
-39:52:29.1 |
HIP 61111 |
26.37 |
| 2026-10-01 12:00 |
12:32:30.66 |
-39:52:48.7 |
HIP 61111 |
26.42 |
| 2026-10-02 00:00 |
12:32:34.84 |
-39:53:08.6 |
HIP 61111 |
26.49 |
| 2026-10-02 12:00 |
12:32:39.02 |
-39:53:28.8 |
HIP 61111 |
26.59 |
| 2026-10-03 00:00 |
12:32:43.20 |
-39:53:49.2 |
HIP 61111 |
26.71 |
| 2026-10-03 12:00 |
12:32:47.38 |
-39:54:09.9 |
HIP 61111 |
26.85 |
| 2026-10-04 00:00 |
12:32:51.56 |
-39:54:30.8 |
HIP 61111 |
27.02 |
| 2026-10-04 12:00 |
12:32:55.74 |
-39:54:52.0 |
HIP 61111 |
27.21 |
| 2026-10-05 00:00 |
12:32:59.91 |
-39:55:13.4 |
HIP 61111 |
27.43 |
| 2026-10-05 12:00 |
12:33:04.09 |
-39:55:35.1 |
HIP 61111 |
27.67 |
| 2026-10-06 00:00 |
12:33:08.27 |
-39:55:57.0 |
HIP 61111 |
27.93 |
| 2026-10-06 12:00 |
12:33:12.44 |
-39:56:19.2 |
HIP 61111 |
28.21 |
| 2026-10-07 00:00 |
12:33:16.61 |
-39:56:41.6 |
HIP 61111 |
28.51 |
| 2026-10-07 12:00 |
12:33:20.78 |
-39:57:04.3 |
HIP 61111 |
28.83 |
| 2026-10-08 00:00 |
12:33:24.95 |
-39:57:27.2 |
HIP 61111 |
29.18 |
| 2026-10-08 12:00 |
12:33:29.11 |
-39:57:50.4 |
HIP 61111 |
29.54 |
| 2026-10-09 00:00 |
12:33:33.27 |
-39:58:13.8 |
HIP 61498 |
28.98 |
| 2026-10-09 12:00 |
12:33:37.43 |
-39:58:37.5 |
HIP 61498 |
28.29 |
| 2026-10-10 00:00 |
12:33:41.58 |
-39:59:01.3 |
HIP 61498 |
27.61 |
| 2026-10-10 12:00 |
12:33:45.73 |
-39:59:25.5 |
HIP 61498 |
26.94 |
| 2026-10-11 00:00 |
12:33:49.87 |
-39:59:49.8 |
HIP 61498 |
26.29 |