メタデータ
| 項目 |
値 |
| Designation |
C/2025 M3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-07-05T05:58:02.746560Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:48Z |
| Obs used |
24 |
| NEO |
- |
| M1 |
8.700 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-06-30T08:56:42.921600Z |
| Discovery magnitude (MPC) |
21.35 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) |
2025-07-02.0000000 |
| e |
1.01973837 |
| q (au) |
6.531641 |
| a (au) |
-330.910866 |
| i (deg) |
137.428013 |
| Ω (om, deg) |
65.265251 |
| ω (w, deg) |
195.386049 |
| M (ma, deg) |
-0.060295 |
等級
散乱 + 全体線形
$$
M_a = (3.530 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.530 |
| n |
6.000 |
| gf |
0.989 |
| 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) |
| 2026-03-26 00:00 |
16:21:07.80 |
-26:38:17.5 |
HIP 79987 |
24.61 |
| 2026-03-26 12:00 |
16:20:48.00 |
-26:39:48.5 |
HIP 79987 |
20.16 |
| 2026-03-27 00:00 |
16:20:27.98 |
-26:41:19.2 |
HIP 79987 |
15.83 |
| 2026-03-27 12:00 |
16:20:07.73 |
-26:42:49.4 |
HIP 79987 |
11.76 |
| 2026-03-28 00:00 |
16:19:47.26 |
-26:44:19.2 |
HIP 79987 |
8.46 |
| 2026-03-28 12:00 |
16:19:26.56 |
-26:45:48.6 |
HIP 79987 |
7.16 |
| 2026-03-29 00:00 |
16:19:05.63 |
-26:47:17.6 |
HIP 79987 |
8.89 |
| 2026-03-29 12:00 |
16:18:44.47 |
-26:48:46.1 |
HIP 79987 |
12.48 |
| 2026-03-30 00:00 |
16:18:23.10 |
-26:50:14.2 |
HIP 79987 |
16.83 |
| 2026-03-30 12:00 |
16:18:01.49 |
-26:51:41.8 |
HIP 79987 |
21.51 |
| 2026-03-31 00:00 |
16:17:39.66 |
-26:53:09.0 |
HIP 79987 |
26.36 |
| 2026-03-31 12:00 |
16:17:17.61 |
-26:54:35.6 |
HIP 79987 |
31.34 |
| 2026-04-01 00:00 |
16:16:55.34 |
-26:56:01.8 |
HIP 79658 |
27.07 |
| 2026-04-01 12:00 |
16:16:32.84 |
-26:57:27.5 |
HIP 79658 |
22.32 |
| 2026-04-02 00:00 |
16:16:10.12 |
-26:58:52.7 |
HIP 79658 |
17.80 |
| 2026-04-02 12:00 |
16:15:47.18 |
-27:00:17.4 |
HIP 79658 |
13.80 |
| 2026-04-03 00:00 |
16:15:24.02 |
-27:01:41.6 |
HIP 79658 |
10.96 |
| 2026-04-03 12:00 |
16:15:00.63 |
-27:03:05.2 |
HIP 79658 |
10.36 |
| 2026-04-04 00:00 |
16:14:37.03 |
-27:04:28.3 |
HIP 79658 |
12.40 |
| 2026-04-04 12:00 |
16:14:13.21 |
-27:05:50.9 |
HIP 79658 |
16.14 |
| 2026-04-05 00:00 |
16:13:49.17 |
-27:07:12.8 |
HIP 79658 |
20.72 |
| 2026-04-05 12:00 |
16:13:24.91 |
-27:08:34.3 |
HIP 79346 |
24.45 |
| 2026-04-06 00:00 |
16:13:00.44 |
-27:09:55.1 |
HIP 79343 |
19.35 |
| 2026-04-06 12:00 |
16:12:35.75 |
-27:11:15.3 |
HIP 79343 |
14.01 |
| 2026-04-07 00:00 |
16:12:10.84 |
-27:12:35.0 |
HIP 79343 |
9.02 |
| 2026-04-07 12:00 |
16:11:45.72 |
-27:13:54.0 |
HIP 79343 |
5.56 |
| 2026-04-08 00:00 |
16:11:20.39 |
-27:15:12.4 |
HIP 79343 |
6.82 |
| 2026-04-08 12:00 |
16:10:54.85 |
-27:16:30.2 |
HIP 79343 |
11.38 |
| 2026-04-09 00:00 |
16:10:29.09 |
-27:17:47.3 |
HIP 79343 |
16.78 |
| 2026-04-09 12:00 |
16:10:03.13 |
-27:19:03.8 |
HIP 79343 |
22.45 |
| 2026-04-10 00:00 |
16:09:36.96 |
-27:20:19.6 |
HIP 79235 |
27.20 |
| 2026-04-10 12:00 |
16:09:10.58 |
-27:21:34.8 |
HIP 79049 |
26.31 |
| 2026-04-11 00:00 |
16:08:43.99 |
-27:22:49.3 |
HIP 79049 |
22.53 |
| 2026-04-11 12:00 |
16:08:17.20 |
-27:24:03.1 |
HIP 79049 |
19.90 |
| 2026-04-12 00:00 |
16:07:50.20 |
-27:25:16.2 |
HIP 79049 |
18.93 |
| 2026-04-12 12:00 |
16:07:23.01 |
-27:26:28.6 |
HIP 78943 |
17.58 |
| 2026-04-13 00:00 |
16:06:55.61 |
-27:27:40.2 |
HIP 78943 |
15.50 |
| 2026-04-13 12:00 |
16:06:28.02 |
-27:28:51.2 |
HIP 78912 |
13.67 |
| 2026-04-14 00:00 |
16:06:00.22 |
-27:30:01.4 |
HIP 78912 |
14.05 |
| 2026-04-14 12:00 |
16:05:32.23 |
-27:31:10.8 |
HIP 78912 |
16.97 |
| 2026-04-15 00:00 |
16:05:04.05 |
-27:32:19.5 |
HIP 78696 |
17.69 |
| 2026-04-15 12:00 |
16:04:35.68 |
-27:33:27.4 |
HIP 78696 |
11.75 |
| 2026-04-16 00:00 |
16:04:07.11 |
-27:34:34.6 |
HIP 78696 |
6.68 |