メタデータ
| 項目 |
値 |
| Designation |
C/2025 M1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2029-08-03T11:56:05.959680Z |
| Orbit solution date (soln_date, UTC) |
2026-05-28T12:12:15Z |
| Obs used |
70 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
7.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-06-21T08:14:47.731200Z |
| Discovery magnitude (MPC) |
20.92 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) |
2025-01-19.0000000 |
| e |
0.99836739 |
| q (au) |
10.827216 |
| a (au) |
6631.840351 |
| i (deg) |
64.906471 |
| Ω (om, deg) |
66.958316 |
| ω (w, deg) |
230.444519 |
| M (ma, deg) |
359.996975 |
等級
散乱 + 全体線形
$$
M_a = (6.387 + 5.220\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.387 |
| n |
5.220 |
| gf |
1.000 |
| gb |
-0.908 |
| k |
0.800 |
| δ90 |
9.978 |
| 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) |
| 2026-06-01 00:00 |
16:31:24.10 |
-30:53:59.8 |
HIP 80758 |
26.83 |
| 2026-06-01 12:00 |
16:31:13.59 |
-30:54:33.3 |
HIP 80758 |
24.52 |
| 2026-06-02 00:00 |
16:31:03.08 |
-30:55:06.6 |
HIP 80758 |
22.21 |
| 2026-06-02 12:00 |
16:30:52.56 |
-30:55:39.7 |
HIP 80758 |
19.91 |
| 2026-06-03 00:00 |
16:30:42.05 |
-30:56:12.5 |
HIP 80758 |
17.61 |
| 2026-06-03 12:00 |
16:30:31.53 |
-30:56:45.0 |
HIP 80758 |
15.33 |
| 2026-06-04 00:00 |
16:30:21.02 |
-30:57:17.3 |
HIP 80758 |
13.05 |
| 2026-06-04 12:00 |
16:30:10.51 |
-30:57:49.4 |
HIP 80758 |
10.79 |
| 2026-06-05 00:00 |
16:30:00.00 |
-30:58:21.2 |
HIP 80758 |
8.57 |
| 2026-06-05 12:00 |
16:29:49.50 |
-30:58:52.8 |
HIP 80758 |
6.40 |
| 2026-06-06 00:00 |
16:29:39.00 |
-30:59:24.1 |
HIP 80758 |
4.40 |
| 2026-06-06 12:00 |
16:29:28.51 |
-30:59:55.2 |
HIP 80758 |
2.88 |
| 2026-06-07 00:00 |
16:29:18.03 |
-31:00:26.1 |
HIP 80758 |
2.82 |
| 2026-06-07 12:00 |
16:29:07.55 |
-31:00:56.7 |
HIP 80758 |
4.26 |
| 2026-06-08 00:00 |
16:28:57.09 |
-31:01:27.1 |
HIP 80758 |
6.24 |
| 2026-06-08 12:00 |
16:28:46.63 |
-31:01:57.3 |
HIP 80683 |
7.99 |
| 2026-06-09 00:00 |
16:28:36.19 |
-31:02:27.2 |
HIP 80683 |
6.25 |
| 2026-06-09 12:00 |
16:28:25.76 |
-31:02:56.9 |
HIP 80683 |
4.97 |
| 2026-06-10 00:00 |
16:28:15.35 |
-31:03:26.4 |
HIP 80683 |
4.57 |
| 2026-06-10 12:00 |
16:28:04.95 |
-31:03:55.7 |
HIP 80683 |
5.24 |
| 2026-06-11 00:00 |
16:27:54.57 |
-31:04:24.7 |
HIP 80683 |
6.66 |
| 2026-06-11 12:00 |
16:27:44.20 |
-31:04:53.5 |
HIP 80683 |
8.47 |
| 2026-06-12 00:00 |
16:27:33.85 |
-31:05:22.1 |
HIP 80683 |
10.45 |
| 2026-06-12 12:00 |
16:27:23.53 |
-31:05:50.5 |
HIP 80556 |
10.83 |
| 2026-06-13 00:00 |
16:27:13.22 |
-31:06:18.6 |
HIP 80556 |
9.09 |
| 2026-06-13 12:00 |
16:27:02.93 |
-31:06:46.6 |
HIP 80556 |
7.64 |
| 2026-06-14 00:00 |
16:26:52.67 |
-31:07:14.3 |
HIP 80556 |
6.66 |
| 2026-06-14 12:00 |
16:26:42.43 |
-31:07:41.8 |
HIP 80556 |
6.35 |
| 2026-06-15 00:00 |
16:26:32.21 |
-31:08:09.1 |
HIP 80556 |
6.81 |
| 2026-06-15 12:00 |
16:26:22.03 |
-31:08:36.2 |
HIP 80504 |
7.05 |
| 2026-06-16 00:00 |
16:26:11.86 |
-31:09:03.1 |
HIP 80504 |
5.54 |
| 2026-06-16 12:00 |
16:26:01.73 |
-31:09:29.8 |
HIP 80504 |
4.66 |
| 2026-06-17 00:00 |
16:25:51.63 |
-31:09:56.3 |
HIP 80504 |
4.73 |
| 2026-06-17 12:00 |
16:25:41.55 |
-31:10:22.5 |
HIP 80504 |
5.73 |
| 2026-06-18 00:00 |
16:25:31.51 |
-31:10:48.6 |
HIP 80504 |
7.27 |
| 2026-06-18 12:00 |
16:25:21.50 |
-31:11:14.5 |
HIP 80504 |
9.08 |
| 2026-06-19 00:00 |
16:25:11.53 |
-31:11:40.3 |
HIP 80504 |
11.01 |
| 2026-06-19 12:00 |
16:25:01.59 |
-31:12:05.8 |
HIP 80504 |
13.02 |
| 2026-06-20 00:00 |
16:24:51.68 |
-31:12:31.1 |
HIP 80504 |
15.06 |
| 2026-06-20 12:00 |
16:24:41.81 |
-31:12:56.3 |
HIP 80504 |
17.13 |
| 2026-06-21 00:00 |
16:24:31.98 |
-31:13:21.2 |
HIP 80504 |
19.20 |
| 2026-06-21 12:00 |
16:24:22.18 |
-31:13:46.0 |
HIP 80245 |
20.78 |
| 2026-06-22 00:00 |
16:24:12.43 |
-31:14:10.6 |
HIP 80245 |
19.14 |