メタデータ
| 項目 |
値 |
| Designation |
P/2015 B1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-09-19T17:29:17.494080Z |
| Orbit solution date (soln_date, UTC) |
2024-10-10T18:10:33Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
8.700 |
| K1 |
10.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2015-01-29T12:27:06.048000Z |
| Discovery magnitude (MPC) |
20.50 T |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-03-20.0000000 |
| e |
0.38244485 |
| q (au) |
5.975638 |
| a (au) |
9.676282 |
| i (deg) |
18.027730 |
| Ω (om, deg) |
353.355655 |
| ω (w, deg) |
188.274147 |
| M (ma, deg) |
353.983856 |
等級
散乱 + 全体線形
$$
M_a = (12.115 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.115 |
| n |
2.000 |
| gf |
0.849 |
| gb |
-0.957 |
| k |
1.000 |
| δ90 |
2.031 |
| 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 |
22:59:41.69 |
-11:41:12.6 |
HIP 113552 |
18.55 |
| 2026-07-29 12:00 |
22:59:35.94 |
-11:41:44.1 |
HIP 113552 |
19.33 |
| 2026-07-30 00:00 |
22:59:30.15 |
-11:42:15.7 |
HIP 113552 |
20.20 |
| 2026-07-30 12:00 |
22:59:24.30 |
-11:42:47.6 |
HIP 113552 |
21.15 |
| 2026-07-31 00:00 |
22:59:18.40 |
-11:43:19.6 |
HIP 113552 |
22.17 |
| 2026-07-31 12:00 |
22:59:12.45 |
-11:43:51.9 |
HIP 113552 |
23.26 |
| 2026-08-01 00:00 |
22:59:06.44 |
-11:44:24.4 |
HIP 113552 |
24.41 |
| 2026-08-01 12:00 |
22:59:00.39 |
-11:44:57.1 |
HIP 113552 |
25.61 |
| 2026-08-02 00:00 |
22:58:54.28 |
-11:45:30.0 |
HIP 113552 |
26.86 |
| 2026-08-02 12:00 |
22:58:48.13 |
-11:46:03.1 |
HIP 113552 |
28.16 |
| 2026-08-03 00:00 |
22:58:41.92 |
-11:46:36.4 |
HIP 113552 |
29.49 |
| 2026-08-03 12:00 |
22:58:35.67 |
-11:47:09.8 |
HIP 113552 |
30.86 |
| 2026-08-04 00:00 |
22:58:29.36 |
-11:47:43.4 |
HIP 113552 |
32.27 |
| 2026-08-04 12:00 |
22:58:23.01 |
-11:48:17.3 |
HIP 113552 |
33.71 |
| 2026-08-05 00:00 |
22:58:16.62 |
-11:48:51.2 |
HIP 113552 |
35.17 |
| 2026-08-05 12:00 |
22:58:10.17 |
-11:49:25.4 |
HIP 113552 |
36.67 |
| 2026-08-06 00:00 |
22:58:03.68 |
-11:49:59.7 |
HIP 113552 |
38.18 |
| 2026-08-06 12:00 |
22:57:57.15 |
-11:50:34.2 |
HIP 113552 |
39.73 |
| 2026-08-07 00:00 |
22:57:50.57 |
-11:51:08.8 |
HIP 113264 |
41.21 |
| 2026-08-07 12:00 |
22:57:43.94 |
-11:51:43.6 |
HIP 113264 |
39.78 |
| 2026-08-08 00:00 |
22:57:37.27 |
-11:52:18.5 |
HIP 113264 |
38.38 |
| 2026-08-08 12:00 |
22:57:30.56 |
-11:52:53.6 |
HIP 113264 |
36.99 |
| 2026-08-09 00:00 |
22:57:23.81 |
-11:53:28.8 |
HIP 113264 |
35.63 |
| 2026-08-09 12:00 |
22:57:17.02 |
-11:54:04.2 |
HIP 113264 |
34.29 |
| 2026-08-10 00:00 |
22:57:10.18 |
-11:54:39.6 |
HIP 113264 |
32.99 |
| 2026-08-10 12:00 |
22:57:03.31 |
-11:55:15.2 |
HIP 113264 |
31.73 |
| 2026-08-11 00:00 |
22:56:56.39 |
-11:55:50.9 |
HIP 113264 |
30.52 |
| 2026-08-11 12:00 |
22:56:49.44 |
-11:56:26.7 |
HIP 113264 |
29.36 |
| 2026-08-12 00:00 |
22:56:42.45 |
-11:57:02.6 |
HIP 113264 |
28.26 |
| 2026-08-12 12:00 |
22:56:35.42 |
-11:57:38.6 |
HIP 113264 |
27.24 |
| 2026-08-13 00:00 |
22:56:28.35 |
-11:58:14.7 |
HIP 113264 |
26.30 |
| 2026-08-13 12:00 |
22:56:21.25 |
-11:58:50.9 |
HIP 113264 |
25.45 |
| 2026-08-14 00:00 |
22:56:14.12 |
-11:59:27.2 |
HIP 113264 |
24.71 |
| 2026-08-14 12:00 |
22:56:06.95 |
-12:00:03.5 |
HIP 113264 |
24.09 |
| 2026-08-15 00:00 |
22:55:59.75 |
-12:00:40.0 |
HIP 113264 |
23.59 |
| 2026-08-15 12:00 |
22:55:52.52 |
-12:01:16.5 |
HIP 113264 |
23.24 |
| 2026-08-16 00:00 |
22:55:45.25 |
-12:01:53.0 |
HIP 113264 |
23.03 |
| 2026-08-16 12:00 |
22:55:37.95 |
-12:02:29.6 |
HIP 113264 |
22.98 |
| 2026-08-17 00:00 |
22:55:30.63 |
-12:03:06.3 |
HIP 113085 |
22.05 |
| 2026-08-17 12:00 |
22:55:23.27 |
-12:03:43.0 |
HIP 113085 |
20.15 |
| 2026-08-18 00:00 |
22:55:15.89 |
-12:04:19.7 |
HIP 113085 |
18.25 |
| 2026-08-18 12:00 |
22:55:08.48 |
-12:04:56.5 |
HIP 113085 |
16.34 |
| 2026-08-19 00:00 |
22:55:01.04 |
-12:05:33.3 |
HIP 113085 |
14.43 |