C/2015 M3 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2015 M3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-08-26T05:34:05.033280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:13Z |
| Obs used |
150 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-09-03.0000000 |
| e |
0.97327847 |
| q (au) |
3.552414 |
| a (au) |
132.942015 |
| i (deg) |
65.951065 |
| Ω (om, deg) |
143.092842 |
| ω (w, deg) |
123.762544 |
| M (ma, deg) |
0.004995 |
等級
散乱 + 全体線形
$$
M_a = (14.907 + 2.182\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.907 |
| n |
2.182 |
| gf |
1.000 |
| gb |
-0.511 |
| 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) |
| 2026-02-03 00:00 |
03:26:47.71 |
-48:20:10.2 |
HIP 16009 |
25.15 |
| 2026-02-03 12:00 |
03:26:47.29 |
-48:19:00.6 |
HIP 16009 |
26.26 |
| 2026-02-04 00:00 |
03:26:46.93 |
-48:17:50.9 |
HIP 16009 |
27.38 |
| 2026-02-04 12:00 |
03:26:46.63 |
-48:16:41.1 |
HIP 15921 |
27.11 |
| 2026-02-05 00:00 |
03:26:46.41 |
-48:15:31.2 |
HIP 15921 |
26.21 |
| 2026-02-05 12:00 |
03:26:46.24 |
-48:14:21.2 |
HIP 15921 |
25.34 |
| 2026-02-06 00:00 |
03:26:46.14 |
-48:13:11.0 |
HIP 15921 |
24.50 |
| 2026-02-06 12:00 |
03:26:46.10 |
-48:12:00.7 |
HIP 15921 |
23.70 |
| 2026-02-07 00:00 |
03:26:46.13 |
-48:10:50.4 |
HIP 15921 |
22.93 |
| 2026-02-07 12:00 |
03:26:46.22 |
-48:09:39.9 |
HIP 15921 |
22.21 |
| 2026-02-08 00:00 |
03:26:46.38 |
-48:08:29.3 |
HIP 15921 |
21.54 |
| 2026-02-08 12:00 |
03:26:46.60 |
-48:07:18.7 |
HIP 15921 |
20.92 |
| 2026-02-09 00:00 |
03:26:46.88 |
-48:06:07.9 |
HIP 15921 |
20.35 |
| 2026-02-09 12:00 |
03:26:47.23 |
-48:04:57.1 |
HIP 15921 |
19.85 |
| 2026-02-10 00:00 |
03:26:47.65 |
-48:03:46.2 |
HIP 15921 |
19.42 |
| 2026-02-10 12:00 |
03:26:48.12 |
-48:02:35.3 |
HIP 15921 |
19.07 |
| 2026-02-11 00:00 |
03:26:48.66 |
-48:01:24.3 |
HIP 15921 |
18.79 |
| 2026-02-11 12:00 |
03:26:49.27 |
-48:00:13.2 |
HIP 15921 |
18.59 |
| 2026-02-12 00:00 |
03:26:49.94 |
-47:59:02.1 |
HIP 15921 |
18.48 |
| 2026-02-12 12:00 |
03:26:50.67 |
-47:57:50.9 |
HIP 15921 |
18.45 |
| 2026-02-13 00:00 |
03:26:51.46 |
-47:56:39.7 |
HIP 15921 |
18.51 |
| 2026-02-13 12:00 |
03:26:52.32 |
-47:55:28.4 |
HIP 15921 |
18.66 |
| 2026-02-14 00:00 |
03:26:53.24 |
-47:54:17.2 |
HIP 15921 |
18.90 |
| 2026-02-14 12:00 |
03:26:54.23 |
-47:53:05.9 |
HIP 15921 |
19.22 |
| 2026-02-15 00:00 |
03:26:55.28 |
-47:51:54.5 |
HIP 15921 |
19.61 |
| 2026-02-15 12:00 |
03:26:56.39 |
-47:50:43.2 |
HIP 15921 |
20.09 |
| 2026-02-16 00:00 |
03:26:57.56 |
-47:49:31.9 |
HIP 15921 |
20.63 |
| 2026-02-16 12:00 |
03:26:58.80 |
-47:48:20.5 |
HIP 15921 |
21.23 |
| 2026-02-17 00:00 |
03:27:00.10 |
-47:47:09.2 |
HIP 15921 |
21.90 |
| 2026-02-17 12:00 |
03:27:01.46 |
-47:45:57.8 |
HIP 15921 |
22.62 |
| 2026-02-18 00:00 |
03:27:02.88 |
-47:44:46.5 |
HIP 15921 |
23.39 |
| 2026-02-18 12:00 |
03:27:04.37 |
-47:43:35.2 |
HIP 15921 |
24.20 |
| 2026-02-19 00:00 |
03:27:05.92 |
-47:42:23.9 |
HIP 15921 |
25.06 |
| 2026-02-19 12:00 |
03:27:07.53 |
-47:41:12.7 |
HIP 15921 |
25.95 |
| 2026-02-20 00:00 |
03:27:09.20 |
-47:40:01.5 |
HIP 15921 |
26.88 |
| 2026-02-20 12:00 |
03:27:10.93 |
-47:38:50.3 |
HIP 15921 |
27.83 |
| 2026-02-21 00:00 |
03:27:12.72 |
-47:37:39.2 |
HIP 15921 |
28.82 |
| 2026-02-21 12:00 |
03:27:14.58 |
-47:36:28.1 |
HIP 16272 |
28.85 |
| 2026-02-22 00:00 |
03:27:16.49 |
-47:35:17.1 |
HIP 16272 |
28.05 |
| 2026-02-22 12:00 |
03:27:18.47 |
-47:34:06.1 |
HIP 16272 |
27.28 |
| 2026-02-23 00:00 |
03:27:20.51 |
-47:32:55.2 |
HIP 16272 |
26.52 |
| 2026-02-23 12:00 |
03:27:22.60 |
-47:31:44.4 |
HIP 16272 |
25.80 |
| 2026-02-24 00:00 |
03:27:24.76 |
-47:30:33.6 |
HIP 16272 |
25.11 |