P/2023 S1 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
P/2023 S1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-02-24T01:22:32.845440Z |
| Orbit solution date (soln_date, UTC) |
2025-09-30T13:39:38Z |
| Obs used |
1909 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
11.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-09-20T14:30:23.443200Z |
| Discovery magnitude (MPC) |
20.36 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-10-26.0000000 |
| e |
0.31885891 |
| q (au) |
2.619727 |
| a (au) |
3.846086 |
| i (deg) |
9.156119 |
| Ω (om, deg) |
317.292934 |
| ω (w, deg) |
180.272871 |
| M (ma, deg) |
344.181453 |
等級
散乱 + 全体線形
$$
M_a = (9.374 + 5.163\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.374 |
| n |
5.163 |
| gf |
0.885 |
| gb |
-0.806 |
| k |
0.997 |
| δ90 |
1.000 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
15:14:59.83 |
-27:18:53.2 |
HIP 74675 |
19.04 |
| 2026-02-03 12:00 |
15:15:24.74 |
-27:21:47.6 |
HIP 74675 |
14.36 |
| 2026-02-04 00:00 |
15:15:49.42 |
-27:24:41.3 |
HIP 74675 |
11.31 |
| 2026-02-04 12:00 |
15:16:13.87 |
-27:27:34.2 |
HIP 74675 |
11.22 |
| 2026-02-05 00:00 |
15:16:38.09 |
-27:30:26.3 |
HIP 74675 |
14.07 |
| 2026-02-05 12:00 |
15:17:02.08 |
-27:33:17.6 |
HIP 74675 |
18.49 |
| 2026-02-06 00:00 |
15:17:25.83 |
-27:36:08.1 |
HIP 74675 |
23.59 |
| 2026-02-06 12:00 |
15:17:49.35 |
-27:38:57.9 |
HIP 74815 |
21.77 |
| 2026-02-07 00:00 |
15:18:12.63 |
-27:41:46.9 |
HIP 74934 |
17.85 |
| 2026-02-07 12:00 |
15:18:35.66 |
-27:44:35.0 |
HIP 74934 |
13.72 |
| 2026-02-08 00:00 |
15:18:58.46 |
-27:47:22.4 |
HIP 74934 |
11.21 |
| 2026-02-08 12:00 |
15:19:21.01 |
-27:50:09.1 |
HIP 74934 |
11.34 |
| 2026-02-09 00:00 |
15:19:43.31 |
-27:52:54.9 |
HIP 74934 |
13.97 |
| 2026-02-09 12:00 |
15:20:05.36 |
-27:55:39.9 |
HIP 74934 |
17.99 |
| 2026-02-10 00:00 |
15:20:27.16 |
-27:58:24.1 |
HIP 75162 |
15.16 |
| 2026-02-10 12:00 |
15:20:48.71 |
-28:01:07.5 |
HIP 75162 |
11.61 |
| 2026-02-11 00:00 |
15:21:10.01 |
-28:03:50.1 |
HIP 75162 |
10.02 |
| 2026-02-11 12:00 |
15:21:31.04 |
-28:06:31.9 |
HIP 75162 |
11.17 |
| 2026-02-12 00:00 |
15:21:51.82 |
-28:09:12.9 |
HIP 75162 |
14.35 |
| 2026-02-12 12:00 |
15:22:12.34 |
-28:11:53.1 |
HIP 75162 |
18.49 |
| 2026-02-13 00:00 |
15:22:32.59 |
-28:14:32.5 |
HIP 75162 |
23.05 |
| 2026-02-13 12:00 |
15:22:52.58 |
-28:17:11.0 |
HIP 75343 |
23.05 |
| 2026-02-14 00:00 |
15:23:12.30 |
-28:19:48.7 |
HIP 75343 |
23.75 |
| 2026-02-14 12:00 |
15:23:31.76 |
-28:22:25.6 |
HIP 75343 |
25.46 |
| 2026-02-15 00:00 |
15:23:50.94 |
-28:25:01.6 |
HIP 75343 |
27.96 |
| 2026-02-15 12:00 |
15:24:09.85 |
-28:27:36.9 |
HIP 75563 |
28.55 |
| 2026-02-16 00:00 |
15:24:28.49 |
-28:30:11.2 |
HIP 75563 |
25.73 |
| 2026-02-16 12:00 |
15:24:46.85 |
-28:32:44.8 |
HIP 75563 |
23.63 |
| 2026-02-17 00:00 |
15:25:04.93 |
-28:35:17.4 |
HIP 75563 |
22.40 |
| 2026-02-17 12:00 |
15:25:22.73 |
-28:37:49.3 |
HIP 75563 |
22.15 |
| 2026-02-18 00:00 |
15:25:40.25 |
-28:40:20.2 |
HIP 75640 |
21.08 |
| 2026-02-18 12:00 |
15:25:57.49 |
-28:42:50.4 |
HIP 75640 |
17.00 |
| 2026-02-19 00:00 |
15:26:14.44 |
-28:45:19.6 |
HIP 75640 |
13.28 |
| 2026-02-19 12:00 |
15:26:31.10 |
-28:47:48.0 |
HIP 75640 |
10.24 |
| 2026-02-20 00:00 |
15:26:47.47 |
-28:50:15.5 |
HIP 75640 |
8.54 |
| 2026-02-20 12:00 |
15:27:03.55 |
-28:52:42.1 |
HIP 75640 |
8.88 |
| 2026-02-21 00:00 |
15:27:19.35 |
-28:55:07.9 |
HIP 75640 |
11.01 |
| 2026-02-21 12:00 |
15:27:34.84 |
-28:57:32.7 |
HIP 75640 |
14.08 |
| 2026-02-22 00:00 |
15:27:50.05 |
-28:59:56.7 |
HIP 75790 |
16.99 |
| 2026-02-22 12:00 |
15:28:04.95 |
-29:02:19.8 |
HIP 75790 |
15.64 |
| 2026-02-23 00:00 |
15:28:19.56 |
-29:04:42.0 |
HIP 75790 |
15.31 |
| 2026-02-23 12:00 |
15:28:33.87 |
-29:07:03.3 |
HIP 75790 |
15.99 |
| 2026-02-24 00:00 |
15:28:47.87 |
-29:09:23.6 |
HIP 75790 |
17.55 |