C/2015 D3 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2015 D3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-05-01T09:15:21.309120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:07Z |
| Obs used |
313 |
| NEO |
- |
| M1 |
10.900 |
| 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) |
2016-09-03.0000000 |
| e |
1.00219956 |
| q (au) |
8.148902 |
| a (au) |
-3704.795712 |
| i (deg) |
128.506522 |
| Ω (om, deg) |
156.980044 |
| ω (w, deg) |
2.885623 |
| M (ma, deg) |
0.000545 |
等級
散乱 + 全体線形
$$
M_a = (10.026 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.026 |
| n |
2.000 |
| gf |
0.906 |
| gb |
-0.987 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
00:37:54.21 |
+59:15:17.1 |
HIP 2768 |
20.37 |
| 2026-02-03 12:00 |
00:37:58.87 |
+59:14:14.4 |
HIP 2768 |
21.16 |
| 2026-02-04 00:00 |
00:38:03.60 |
+59:13:12.2 |
HIP 2768 |
21.99 |
| 2026-02-04 12:00 |
00:38:08.39 |
+59:12:10.6 |
HIP 2768 |
22.86 |
| 2026-02-05 00:00 |
00:38:13.25 |
+59:11:09.4 |
HIP 3166 |
23.24 |
| 2026-02-05 12:00 |
00:38:18.17 |
+59:10:08.8 |
HIP 3166 |
23.56 |
| 2026-02-06 00:00 |
00:38:23.16 |
+59:09:08.8 |
HIP 3166 |
23.93 |
| 2026-02-06 12:00 |
00:38:28.22 |
+59:08:09.2 |
HIP 3166 |
24.33 |
| 2026-02-07 00:00 |
00:38:33.33 |
+59:07:10.2 |
HIP 3166 |
24.77 |
| 2026-02-07 12:00 |
00:38:38.51 |
+59:06:11.8 |
HIP 3229 |
23.96 |
| 2026-02-08 00:00 |
00:38:43.76 |
+59:05:13.9 |
HIP 3229 |
22.84 |
| 2026-02-08 12:00 |
00:38:49.06 |
+59:04:16.5 |
HIP 3229 |
21.72 |
| 2026-02-09 00:00 |
00:38:54.43 |
+59:03:19.7 |
HIP 3229 |
20.61 |
| 2026-02-09 12:00 |
00:38:59.85 |
+59:02:23.5 |
HIP 3229 |
19.51 |
| 2026-02-10 00:00 |
00:39:05.34 |
+59:01:27.7 |
HIP 3229 |
18.41 |
| 2026-02-10 12:00 |
00:39:10.89 |
+59:00:32.6 |
HIP 3229 |
17.32 |
| 2026-02-11 00:00 |
00:39:16.50 |
+58:59:38.0 |
HIP 3229 |
16.23 |
| 2026-02-11 12:00 |
00:39:22.16 |
+58:58:44.0 |
HIP 3229 |
15.16 |
| 2026-02-12 00:00 |
00:39:27.89 |
+58:57:50.5 |
HIP 3229 |
14.09 |
| 2026-02-12 12:00 |
00:39:33.67 |
+58:56:57.6 |
HIP 3229 |
13.04 |
| 2026-02-13 00:00 |
00:39:39.51 |
+58:56:05.2 |
HIP 3229 |
12.00 |
| 2026-02-13 12:00 |
00:39:45.40 |
+58:55:13.4 |
HIP 3229 |
10.98 |
| 2026-02-14 00:00 |
00:39:51.36 |
+58:54:22.2 |
HIP 3229 |
9.99 |
| 2026-02-14 12:00 |
00:39:57.36 |
+58:53:31.6 |
HIP 3229 |
9.02 |
| 2026-02-15 00:00 |
00:40:03.42 |
+58:52:41.5 |
HIP 3229 |
8.10 |
| 2026-02-15 12:00 |
00:40:09.54 |
+58:51:52.0 |
HIP 3229 |
7.23 |
| 2026-02-16 00:00 |
00:40:15.71 |
+58:51:03.1 |
HIP 3229 |
6.44 |
| 2026-02-16 12:00 |
00:40:21.93 |
+58:50:14.8 |
HIP 3229 |
5.76 |
| 2026-02-17 00:00 |
00:40:28.20 |
+58:49:27.0 |
HIP 3229 |
5.23 |
| 2026-02-17 12:00 |
00:40:34.53 |
+58:48:39.8 |
HIP 3229 |
4.90 |
| 2026-02-18 00:00 |
00:40:40.90 |
+58:47:53.2 |
HIP 3229 |
4.81 |
| 2026-02-18 12:00 |
00:40:47.33 |
+58:47:07.2 |
HIP 3229 |
4.97 |
| 2026-02-19 00:00 |
00:40:53.80 |
+58:46:21.8 |
HIP 3229 |
5.36 |
| 2026-02-19 12:00 |
00:41:00.33 |
+58:45:37.0 |
HIP 3229 |
5.93 |
| 2026-02-20 00:00 |
00:41:06.90 |
+58:44:52.7 |
HIP 3229 |
6.63 |
| 2026-02-20 12:00 |
00:41:13.52 |
+58:44:09.0 |
HIP 3229 |
7.43 |
| 2026-02-21 00:00 |
00:41:20.19 |
+58:43:26.0 |
HIP 3229 |
8.30 |
| 2026-02-21 12:00 |
00:41:26.91 |
+58:42:43.5 |
HIP 3334 |
8.68 |
| 2026-02-22 00:00 |
00:41:33.67 |
+58:42:01.6 |
HIP 3334 |
8.09 |
| 2026-02-22 12:00 |
00:41:40.47 |
+58:41:20.3 |
HIP 3334 |
7.62 |
| 2026-02-23 00:00 |
00:41:47.32 |
+58:40:39.5 |
HIP 3334 |
7.27 |
| 2026-02-23 12:00 |
00:41:54.21 |
+58:39:59.4 |
HIP 3334 |
7.07 |
| 2026-02-24 00:00 |
00:42:01.15 |
+58:39:19.9 |
HIP 3329 |
6.12 |