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) |
| 2026-03-26 00:00 |
00:49:53.96 |
+58:17:46.8 |
HIP 3819 |
10.41 |
| 2026-03-26 12:00 |
00:50:02.41 |
+58:17:42.9 |
HIP 3819 |
11.20 |
| 2026-03-27 00:00 |
00:50:10.88 |
+58:17:39.6 |
HIP 4012 |
10.15 |
| 2026-03-27 12:00 |
00:50:19.35 |
+58:17:36.8 |
HIP 4012 |
9.04 |
| 2026-03-28 00:00 |
00:50:27.82 |
+58:17:34.7 |
HIP 4012 |
7.93 |
| 2026-03-28 12:00 |
00:50:36.30 |
+58:17:33.0 |
HIP 4012 |
6.82 |
| 2026-03-29 00:00 |
00:50:44.78 |
+58:17:31.9 |
HIP 4012 |
5.72 |
| 2026-03-29 12:00 |
00:50:53.27 |
+58:17:31.4 |
HIP 4012 |
4.61 |
| 2026-03-30 00:00 |
00:51:01.76 |
+58:17:31.4 |
HIP 4012 |
3.50 |
| 2026-03-30 12:00 |
00:51:10.25 |
+58:17:31.9 |
HIP 4012 |
2.40 |
| 2026-03-31 00:00 |
00:51:18.75 |
+58:17:33.0 |
HIP 4012 |
1.33 |
| 2026-03-31 12:00 |
00:51:27.24 |
+58:17:34.6 |
HIP 4012 |
0.50 |
| 2026-04-01 00:00 |
00:51:35.74 |
+58:17:36.8 |
HIP 4012 |
1.10 |
| 2026-04-01 12:00 |
00:51:44.24 |
+58:17:39.5 |
HIP 4012 |
2.16 |
| 2026-04-02 00:00 |
00:51:52.74 |
+58:17:42.7 |
HIP 4012 |
3.26 |
| 2026-04-02 12:00 |
00:52:01.24 |
+58:17:46.5 |
HIP 4012 |
4.36 |
| 2026-04-03 00:00 |
00:52:09.73 |
+58:17:50.8 |
HIP 4012 |
5.47 |
| 2026-04-03 12:00 |
00:52:18.23 |
+58:17:55.6 |
HIP 4012 |
6.59 |
| 2026-04-04 00:00 |
00:52:26.72 |
+58:18:01.0 |
HIP 4012 |
7.70 |
| 2026-04-04 12:00 |
00:52:35.21 |
+58:18:06.9 |
HIP 4012 |
8.82 |
| 2026-04-05 00:00 |
00:52:43.70 |
+58:18:13.3 |
HIP 4012 |
9.93 |
| 2026-04-05 12:00 |
00:52:52.19 |
+58:18:20.2 |
HIP 4012 |
11.05 |
| 2026-04-06 00:00 |
00:53:00.67 |
+58:18:27.7 |
HIP 4012 |
12.17 |
| 2026-04-06 12:00 |
00:53:09.15 |
+58:18:35.7 |
HIP 4012 |
13.28 |
| 2026-04-07 00:00 |
00:53:17.62 |
+58:18:44.2 |
HIP 4012 |
14.40 |
| 2026-04-07 12:00 |
00:53:26.08 |
+58:18:53.2 |
HIP 4012 |
15.52 |
| 2026-04-08 00:00 |
00:53:34.54 |
+58:19:02.7 |
HIP 4012 |
16.64 |
| 2026-04-08 12:00 |
00:53:43.00 |
+58:19:12.8 |
HIP 4284 |
17.30 |
| 2026-04-09 00:00 |
00:53:51.44 |
+58:19:23.3 |
HIP 4284 |
16.58 |
| 2026-04-09 12:00 |
00:53:59.88 |
+58:19:34.4 |
HIP 4284 |
15.90 |
| 2026-04-10 00:00 |
00:54:08.31 |
+58:19:45.9 |
HIP 4284 |
15.26 |
| 2026-04-10 12:00 |
00:54:16.73 |
+58:19:58.0 |
HIP 4284 |
14.68 |
| 2026-04-11 00:00 |
00:54:25.14 |
+58:20:10.6 |
HIP 4284 |
14.15 |
| 2026-04-11 12:00 |
00:54:33.54 |
+58:20:23.7 |
HIP 4284 |
13.68 |
| 2026-04-12 00:00 |
00:54:41.94 |
+58:20:37.3 |
HIP 4284 |
13.29 |
| 2026-04-12 12:00 |
00:54:50.32 |
+58:20:51.4 |
HIP 4284 |
12.97 |
| 2026-04-13 00:00 |
00:54:58.69 |
+58:21:05.9 |
HIP 4284 |
12.74 |
| 2026-04-13 12:00 |
00:55:07.04 |
+58:21:21.0 |
HIP 4284 |
12.59 |
| 2026-04-14 00:00 |
00:55:15.39 |
+58:21:36.6 |
HIP 4284 |
12.53 |
| 2026-04-14 12:00 |
00:55:23.72 |
+58:21:52.6 |
HIP 4284 |
12.56 |
| 2026-04-15 00:00 |
00:55:32.04 |
+58:22:09.2 |
HIP 4284 |
12.69 |
| 2026-04-15 12:00 |
00:55:40.34 |
+58:22:26.2 |
HIP 4284 |
12.90 |
| 2026-04-16 00:00 |
00:55:48.63 |
+58:22:43.7 |
HIP 4284 |
13.20 |