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 |
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 |
01:18:29.43 |
+50:44:30.2 |
HIP 6180 |
8.46 |
| 2026-03-26 12:00 |
01:18:35.46 |
+50:44:43.0 |
HIP 6180 |
7.51 |
| 2026-03-27 00:00 |
01:18:41.50 |
+50:44:56.1 |
HIP 6180 |
6.57 |
| 2026-03-27 12:00 |
01:18:47.55 |
+50:45:09.7 |
HIP 6180 |
5.64 |
| 2026-03-28 00:00 |
01:18:53.62 |
+50:45:23.6 |
HIP 6180 |
4.72 |
| 2026-03-28 12:00 |
01:18:59.70 |
+50:45:38.0 |
HIP 6180 |
3.83 |
| 2026-03-29 00:00 |
01:19:05.79 |
+50:45:52.7 |
HIP 6180 |
3.00 |
| 2026-03-29 12:00 |
01:19:11.89 |
+50:46:07.8 |
HIP 6180 |
2.30 |
| 2026-03-30 00:00 |
01:19:18.00 |
+50:46:23.3 |
HIP 6180 |
1.87 |
| 2026-03-30 12:00 |
01:19:24.12 |
+50:46:39.2 |
HIP 6180 |
1.93 |
| 2026-03-31 00:00 |
01:19:30.26 |
+50:46:55.5 |
HIP 6180 |
2.44 |
| 2026-03-31 12:00 |
01:19:36.40 |
+50:47:12.2 |
HIP 6180 |
3.19 |
| 2026-04-01 00:00 |
01:19:42.55 |
+50:47:29.3 |
HIP 6180 |
4.06 |
| 2026-04-01 12:00 |
01:19:48.71 |
+50:47:46.7 |
HIP 6180 |
4.98 |
| 2026-04-02 00:00 |
01:19:54.88 |
+50:48:04.5 |
HIP 6180 |
5.93 |
| 2026-04-02 12:00 |
01:20:01.06 |
+50:48:22.7 |
HIP 6180 |
6.91 |
| 2026-04-03 00:00 |
01:20:07.25 |
+50:48:41.3 |
HIP 6180 |
7.89 |
| 2026-04-03 12:00 |
01:20:13.44 |
+50:49:00.3 |
HIP 6180 |
8.89 |
| 2026-04-04 00:00 |
01:20:19.64 |
+50:49:19.7 |
HIP 6180 |
9.90 |
| 2026-04-04 12:00 |
01:20:25.85 |
+50:49:39.4 |
HIP 6180 |
10.91 |
| 2026-04-05 00:00 |
01:20:32.06 |
+50:49:59.5 |
HIP 6180 |
11.93 |
| 2026-04-05 12:00 |
01:20:38.28 |
+50:50:20.0 |
HIP 6180 |
12.95 |
| 2026-04-06 00:00 |
01:20:44.51 |
+50:50:40.8 |
HIP 6180 |
13.98 |
| 2026-04-06 12:00 |
01:20:50.74 |
+50:51:02.1 |
HIP 6180 |
15.01 |
| 2026-04-07 00:00 |
01:20:56.98 |
+50:51:23.7 |
HIP 6359 |
15.95 |
| 2026-04-07 12:00 |
01:21:03.22 |
+50:51:45.7 |
HIP 6359 |
15.21 |
| 2026-04-08 00:00 |
01:21:09.46 |
+50:52:08.0 |
HIP 6359 |
14.51 |
| 2026-04-08 12:00 |
01:21:15.71 |
+50:52:30.7 |
HIP 6359 |
13.84 |
| 2026-04-09 00:00 |
01:21:21.96 |
+50:52:53.8 |
HIP 6359 |
13.22 |
| 2026-04-09 12:00 |
01:21:28.22 |
+50:53:17.3 |
HIP 6359 |
12.65 |
| 2026-04-10 00:00 |
01:21:34.47 |
+50:53:41.1 |
HIP 6359 |
12.14 |
| 2026-04-10 12:00 |
01:21:40.73 |
+50:54:05.3 |
HIP 6359 |
11.70 |
| 2026-04-11 00:00 |
01:21:46.99 |
+50:54:29.8 |
HIP 6359 |
11.33 |
| 2026-04-11 12:00 |
01:21:53.25 |
+50:54:54.7 |
HIP 6359 |
11.05 |
| 2026-04-12 00:00 |
01:21:59.52 |
+50:55:20.0 |
HIP 6359 |
10.87 |
| 2026-04-12 12:00 |
01:22:05.78 |
+50:55:45.6 |
HIP 6359 |
10.78 |
| 2026-04-13 00:00 |
01:22:12.04 |
+50:56:11.6 |
HIP 6359 |
10.79 |
| 2026-04-13 12:00 |
01:22:18.31 |
+50:56:38.0 |
HIP 6359 |
10.90 |
| 2026-04-14 00:00 |
01:22:24.57 |
+50:57:04.7 |
HIP 6359 |
11.11 |
| 2026-04-14 12:00 |
01:22:30.83 |
+50:57:31.7 |
HIP 6359 |
11.42 |
| 2026-04-15 00:00 |
01:22:37.09 |
+50:57:59.1 |
HIP 6359 |
11.81 |
| 2026-04-15 12:00 |
01:22:43.35 |
+50:58:26.9 |
HIP 6359 |
12.29 |
| 2026-04-16 00:00 |
01:22:49.60 |
+50:58:55.0 |
HIP 6359 |
12.83 |