メタデータ
| 項目 |
値 |
| Designation |
P/2023 M1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-12-14T10:50:57.154560Z |
| Orbit solution date (soln_date, UTC) |
2023-06-30T22:18:01Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
22.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-06-16T09:48:14.918400Z |
| Discovery magnitude (MPC) |
20.42 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-06-04.0000000 |
| e |
0.58789811 |
| q (au) |
2.825892 |
| a (au) |
6.857265 |
| i (deg) |
12.289932 |
| Ω (om, deg) |
216.866513 |
| ω (w, deg) |
79.702108 |
| M (ma, deg) |
349.381798 |
等級
散乱 + 全体線形
$$
M_a = (14.340 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.340 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.741 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
04:22:07.64 |
+17:05:34.0 |
HIP 20352 |
19.26 |
| 2026-07-29 12:00 |
04:22:21.55 |
+17:05:35.1 |
HIP 20441 |
18.95 |
| 2026-07-30 00:00 |
04:22:35.35 |
+17:05:35.8 |
HIP 20441 |
18.27 |
| 2026-07-30 12:00 |
04:22:49.05 |
+17:05:36.0 |
HIP 20441 |
18.17 |
| 2026-07-31 00:00 |
04:23:02.65 |
+17:05:35.8 |
HIP 20441 |
18.64 |
| 2026-07-31 12:00 |
04:23:16.14 |
+17:05:35.1 |
HIP 20567 |
15.81 |
| 2026-08-01 00:00 |
04:23:29.53 |
+17:05:34.0 |
HIP 20567 |
12.62 |
| 2026-08-01 12:00 |
04:23:42.81 |
+17:05:32.5 |
HIP 20567 |
9.45 |
| 2026-08-02 00:00 |
04:23:55.99 |
+17:05:30.6 |
HIP 20567 |
6.31 |
| 2026-08-02 12:00 |
04:24:09.05 |
+17:05:28.2 |
HIP 20567 |
3.23 |
| 2026-08-03 00:00 |
04:24:22.01 |
+17:05:25.4 |
HIP 20567 |
0.68 |
| 2026-08-03 12:00 |
04:24:34.86 |
+17:05:22.1 |
HIP 20567 |
3.09 |
| 2026-08-04 00:00 |
04:24:47.60 |
+17:05:18.4 |
HIP 20567 |
6.09 |
| 2026-08-04 12:00 |
04:25:00.23 |
+17:05:14.3 |
HIP 20567 |
9.10 |
| 2026-08-05 00:00 |
04:25:12.75 |
+17:05:09.8 |
HIP 20567 |
12.08 |
| 2026-08-05 12:00 |
04:25:25.16 |
+17:05:04.8 |
HIP 20567 |
15.05 |
| 2026-08-06 00:00 |
04:25:37.45 |
+17:04:59.4 |
HIP 20719 |
17.80 |
| 2026-08-06 12:00 |
04:25:49.63 |
+17:04:53.5 |
HIP 20756 |
15.03 |
| 2026-08-07 00:00 |
04:26:01.70 |
+17:04:47.3 |
HIP 20756 |
12.20 |
| 2026-08-07 12:00 |
04:26:13.65 |
+17:04:40.6 |
HIP 20756 |
9.43 |
| 2026-08-08 00:00 |
04:26:25.48 |
+17:04:33.4 |
HIP 20756 |
6.75 |
| 2026-08-08 12:00 |
04:26:37.20 |
+17:04:25.8 |
HIP 20756 |
4.29 |
| 2026-08-09 00:00 |
04:26:48.81 |
+17:04:17.8 |
HIP 20756 |
2.63 |
| 2026-08-09 12:00 |
04:27:00.29 |
+17:04:09.4 |
HIP 20756 |
3.27 |
| 2026-08-10 00:00 |
04:27:11.66 |
+17:04:00.5 |
HIP 20756 |
5.41 |
| 2026-08-10 12:00 |
04:27:22.90 |
+17:03:51.2 |
HIP 20756 |
7.89 |
| 2026-08-11 00:00 |
04:27:34.03 |
+17:03:41.5 |
HIP 20756 |
10.44 |
| 2026-08-11 12:00 |
04:27:45.03 |
+17:03:31.3 |
HIP 20756 |
13.01 |
| 2026-08-12 00:00 |
04:27:55.92 |
+17:03:20.8 |
HIP 20756 |
15.57 |
| 2026-08-12 12:00 |
04:28:06.68 |
+17:03:09.7 |
HIP 20899 |
17.14 |
| 2026-08-13 00:00 |
04:28:17.31 |
+17:02:58.3 |
HIP 20899 |
15.97 |
| 2026-08-13 12:00 |
04:28:27.83 |
+17:02:46.4 |
HIP 20899 |
15.16 |
| 2026-08-14 00:00 |
04:28:38.22 |
+17:02:34.1 |
HIP 20899 |
14.76 |
| 2026-08-14 12:00 |
04:28:48.48 |
+17:02:21.4 |
HIP 20899 |
14.78 |
| 2026-08-15 00:00 |
04:28:58.62 |
+17:02:08.2 |
HIP 20899 |
15.20 |
| 2026-08-15 12:00 |
04:29:08.63 |
+17:01:54.7 |
HIP 20899 |
15.98 |
| 2026-08-16 00:00 |
04:29:18.51 |
+17:01:40.7 |
HIP 20899 |
17.06 |
| 2026-08-16 12:00 |
04:29:28.27 |
+17:01:26.3 |
HIP 20899 |
18.38 |
| 2026-08-17 00:00 |
04:29:37.90 |
+17:01:11.4 |
HIP 20899 |
19.87 |
| 2026-08-17 12:00 |
04:29:47.40 |
+17:00:56.2 |
HIP 20978 |
20.71 |
| 2026-08-18 00:00 |
04:29:56.77 |
+17:00:40.5 |
HIP 20978 |
20.30 |
| 2026-08-18 12:00 |
04:30:06.01 |
+17:00:24.4 |
HIP 20978 |
20.13 |
| 2026-08-19 00:00 |
04:30:15.12 |
+17:00:07.9 |
HIP 20978 |
20.19 |