C/2023 H3 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2023 H3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-02-19T01:10:07.178880Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:22Z |
| Obs used |
69 |
| NEO |
- |
| M1 |
14.100 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-04-28T09:29:59.020800Z |
| Discovery magnitude (MPC) |
20.89 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) |
2023-09-20.0000000 |
| e |
0.61628192 |
| q (au) |
5.232368 |
| a (au) |
13.635969 |
| i (deg) |
2.489070 |
| Ω (om, deg) |
55.102603 |
| ω (w, deg) |
193.332545 |
| M (ma, deg) |
357.023830 |
等級
散乱 + 全体線形
$$
M_a = (12.936 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.936 |
| n |
2.000 |
| gf |
0.998 |
| gb |
-0.935 |
| 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
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 |
21:00:22.83 |
-19:12:50.2 |
HIP 103616 |
15.38 |
| 2026-02-03 12:00 |
21:00:45.77 |
-19:11:16.2 |
HIP 103616 |
18.83 |
| 2026-02-04 00:00 |
21:01:08.69 |
-19:09:42.1 |
HIP 103751 |
15.24 |
| 2026-02-04 12:00 |
21:01:31.59 |
-19:08:08.0 |
HIP 103751 |
13.14 |
| 2026-02-05 00:00 |
21:01:54.47 |
-19:06:33.8 |
HIP 103751 |
13.29 |
| 2026-02-05 12:00 |
21:02:17.33 |
-19:04:59.6 |
HIP 103865 |
11.91 |
| 2026-02-06 00:00 |
21:02:40.17 |
-19:03:25.4 |
HIP 103865 |
11.56 |
| 2026-02-06 12:00 |
21:03:02.98 |
-19:01:51.1 |
HIP 103865 |
13.73 |
| 2026-02-07 00:00 |
21:03:25.78 |
-19:00:16.8 |
HIP 103865 |
17.51 |
| 2026-02-07 12:00 |
21:03:48.55 |
-18:58:42.5 |
HIP 103865 |
22.07 |
| 2026-02-08 00:00 |
21:04:11.29 |
-18:57:08.1 |
HIP 103997 |
25.74 |
| 2026-02-08 12:00 |
21:04:34.01 |
-18:55:33.7 |
HIP 103997 |
24.64 |
| 2026-02-09 00:00 |
21:04:56.71 |
-18:53:59.3 |
HIP 103997 |
24.79 |
| 2026-02-09 12:00 |
21:05:19.38 |
-18:52:24.9 |
HIP 103997 |
26.17 |
| 2026-02-10 00:00 |
21:05:42.03 |
-18:50:50.4 |
HIP 104230 |
21.84 |
| 2026-02-10 12:00 |
21:06:04.64 |
-18:49:16.0 |
HIP 104230 |
16.32 |
| 2026-02-11 00:00 |
21:06:27.23 |
-18:47:41.6 |
HIP 104230 |
10.87 |
| 2026-02-11 12:00 |
21:06:49.79 |
-18:46:07.1 |
HIP 104230 |
5.66 |
| 2026-02-12 00:00 |
21:07:12.33 |
-18:44:32.7 |
HIP 104230 |
2.81 |
| 2026-02-12 12:00 |
21:07:34.83 |
-18:42:58.2 |
HIP 104230 |
6.75 |
| 2026-02-13 00:00 |
21:07:57.30 |
-18:41:23.8 |
HIP 104230 |
12.04 |
| 2026-02-13 12:00 |
21:08:19.75 |
-18:39:49.4 |
HIP 104387 |
8.09 |
| 2026-02-14 00:00 |
21:08:42.16 |
-18:38:15.0 |
HIP 104387 |
5.68 |
| 2026-02-14 12:00 |
21:09:04.54 |
-18:36:40.6 |
HIP 104387 |
7.77 |
| 2026-02-15 00:00 |
21:09:26.88 |
-18:35:06.2 |
HIP 104387 |
12.22 |
| 2026-02-15 12:00 |
21:09:49.19 |
-18:33:31.9 |
HIP 104540 |
17.10 |
| 2026-02-16 00:00 |
21:10:11.47 |
-18:31:57.6 |
HIP 104540 |
13.10 |
| 2026-02-16 12:00 |
21:10:33.71 |
-18:30:23.4 |
HIP 104540 |
10.55 |
| 2026-02-17 00:00 |
21:10:55.92 |
-18:28:49.2 |
HIP 104540 |
10.57 |
| 2026-02-17 12:00 |
21:11:18.09 |
-18:27:15.0 |
HIP 104540 |
13.12 |
| 2026-02-18 00:00 |
21:11:40.23 |
-18:25:40.9 |
HIP 104540 |
17.11 |
| 2026-02-18 12:00 |
21:12:02.33 |
-18:24:06.8 |
HIP 104540 |
21.75 |
| 2026-02-19 00:00 |
21:12:24.39 |
-18:22:32.8 |
HIP 104540 |
26.70 |
| 2026-02-19 12:00 |
21:12:46.41 |
-18:20:58.8 |
HIP 104540 |
31.81 |
| 2026-02-20 00:00 |
21:13:08.39 |
-18:19:25.0 |
HIP 104915 |
31.48 |
| 2026-02-20 12:00 |
21:13:30.33 |
-18:17:51.1 |
HIP 104915 |
26.11 |
| 2026-02-21 00:00 |
21:13:52.23 |
-18:16:17.4 |
HIP 104915 |
20.78 |
| 2026-02-21 12:00 |
21:14:14.08 |
-18:14:43.7 |
HIP 104915 |
15.52 |
| 2026-02-22 00:00 |
21:14:35.90 |
-18:13:10.2 |
HIP 104915 |
10.44 |
| 2026-02-22 12:00 |
21:14:57.67 |
-18:11:36.7 |
HIP 104915 |
5.99 |
| 2026-02-23 00:00 |
21:15:19.40 |
-18:10:03.3 |
HIP 104915 |
4.58 |
| 2026-02-23 12:00 |
21:15:41.09 |
-18:08:29.9 |
HIP 104915 |
8.01 |
| 2026-02-24 00:00 |
21:16:02.73 |
-18:06:56.7 |
HIP 104915 |
12.84 |