メタデータ
| 項目 |
値 |
| Designation |
C/2015 R3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-02-11T21:36:17.124480Z |
| Orbit solution date (soln_date, UTC) |
2022-07-06T03:12:21Z |
| Obs used |
41 |
| NEO |
- |
| M1 |
8.600 |
| K1 |
10.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-07-26.0000000 |
| e |
0.99867972 |
| q (au) |
4.902904 |
| a (au) |
3713.532087 |
| i (deg) |
83.610000 |
| Ω (om, deg) |
36.413320 |
| ω (w, deg) |
272.016706 |
| M (ma, deg) |
0.002304 |
等級
散乱 + 全体線形
$$
M_a = (9.213 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.213 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.837 |
| k |
0.800 |
| δ90 |
9.997 |
| 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) |
| 2026-07-29 00:00 |
01:34:27.11 |
+53:47:10.9 |
HIP 7257 |
9.47 |
| 2026-07-29 12:00 |
01:34:25.46 |
+53:48:00.4 |
HIP 7257 |
8.87 |
| 2026-07-30 00:00 |
01:34:23.75 |
+53:48:49.7 |
HIP 7257 |
8.32 |
| 2026-07-30 12:00 |
01:34:21.99 |
+53:49:38.8 |
HIP 7257 |
7.82 |
| 2026-07-31 00:00 |
01:34:20.16 |
+53:50:27.7 |
HIP 7257 |
7.38 |
| 2026-07-31 12:00 |
01:34:18.28 |
+53:51:16.4 |
HIP 7257 |
7.00 |
| 2026-08-01 00:00 |
01:34:16.33 |
+53:52:04.9 |
HIP 7257 |
6.71 |
| 2026-08-01 12:00 |
01:34:14.32 |
+53:52:53.2 |
HIP 7257 |
6.50 |
| 2026-08-02 00:00 |
01:34:12.26 |
+53:53:41.2 |
HIP 7257 |
6.40 |
| 2026-08-02 12:00 |
01:34:10.14 |
+53:54:29.1 |
HIP 7257 |
6.40 |
| 2026-08-03 00:00 |
01:34:07.95 |
+53:55:16.7 |
HIP 7257 |
6.51 |
| 2026-08-03 12:00 |
01:34:05.71 |
+53:56:04.0 |
HIP 7257 |
6.71 |
| 2026-08-04 00:00 |
01:34:03.41 |
+53:56:51.2 |
HIP 7257 |
7.01 |
| 2026-08-04 12:00 |
01:34:01.04 |
+53:57:38.1 |
HIP 7257 |
7.38 |
| 2026-08-05 00:00 |
01:33:58.62 |
+53:58:24.7 |
HIP 7257 |
7.82 |
| 2026-08-05 12:00 |
01:33:56.14 |
+53:59:11.2 |
HIP 7257 |
8.32 |
| 2026-08-06 00:00 |
01:33:53.60 |
+53:59:57.3 |
HIP 7257 |
8.87 |
| 2026-08-06 12:00 |
01:33:51.00 |
+54:00:43.3 |
HIP 7257 |
9.46 |
| 2026-08-07 00:00 |
01:33:48.34 |
+54:01:28.9 |
HIP 7257 |
10.08 |
| 2026-08-07 12:00 |
01:33:45.62 |
+54:02:14.4 |
HIP 7257 |
10.72 |
| 2026-08-08 00:00 |
01:33:42.85 |
+54:02:59.5 |
HIP 7257 |
11.39 |
| 2026-08-08 12:00 |
01:33:40.01 |
+54:03:44.4 |
HIP 7257 |
12.08 |
| 2026-08-09 00:00 |
01:33:37.11 |
+54:04:29.1 |
HIP 7257 |
12.78 |
| 2026-08-09 12:00 |
01:33:34.16 |
+54:05:13.4 |
HIP 7257 |
13.49 |
| 2026-08-10 00:00 |
01:33:31.14 |
+54:05:57.5 |
HIP 7145 |
13.46 |
| 2026-08-10 12:00 |
01:33:28.07 |
+54:06:41.3 |
HIP 7145 |
13.33 |
| 2026-08-11 00:00 |
01:33:24.94 |
+54:07:24.9 |
HIP 7145 |
13.24 |
| 2026-08-11 12:00 |
01:33:21.75 |
+54:08:08.1 |
HIP 7145 |
13.19 |
| 2026-08-12 00:00 |
01:33:18.50 |
+54:08:51.1 |
HIP 7145 |
13.20 |
| 2026-08-12 12:00 |
01:33:15.19 |
+54:09:33.8 |
HIP 7145 |
13.25 |
| 2026-08-13 00:00 |
01:33:11.83 |
+54:10:16.2 |
HIP 7145 |
13.34 |
| 2026-08-13 12:00 |
01:33:08.40 |
+54:10:58.3 |
HIP 7145 |
13.48 |
| 2026-08-14 00:00 |
01:33:04.92 |
+54:11:40.1 |
HIP 7145 |
13.67 |
| 2026-08-14 12:00 |
01:33:01.38 |
+54:12:21.6 |
HIP 7145 |
13.89 |
| 2026-08-15 00:00 |
01:32:57.79 |
+54:13:02.8 |
HIP 7145 |
14.16 |
| 2026-08-15 12:00 |
01:32:54.13 |
+54:13:43.7 |
HIP 7145 |
14.47 |
| 2026-08-16 00:00 |
01:32:50.42 |
+54:14:24.2 |
HIP 7145 |
14.81 |
| 2026-08-16 12:00 |
01:32:46.66 |
+54:15:04.5 |
HIP 7171 |
14.21 |
| 2026-08-17 00:00 |
01:32:42.83 |
+54:15:44.4 |
HIP 7171 |
13.45 |
| 2026-08-17 12:00 |
01:32:38.95 |
+54:16:24.1 |
HIP 7171 |
12.71 |
| 2026-08-18 00:00 |
01:32:35.01 |
+54:17:03.4 |
HIP 7171 |
12.00 |
| 2026-08-18 12:00 |
01:32:31.02 |
+54:17:42.3 |
HIP 7171 |
11.31 |
| 2026-08-19 00:00 |
01:32:26.97 |
+54:18:21.0 |
HIP 7171 |
10.65 |