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) |
| 2026-06-01 00:00 |
23:03:10.37 |
-11:19:33.4 |
HIP 113779 |
10.09 |
| 2026-06-01 12:00 |
23:03:12.78 |
-11:19:20.4 |
HIP 113779 |
10.58 |
| 2026-06-02 00:00 |
23:03:15.12 |
-11:19:07.8 |
HIP 113779 |
11.06 |
| 2026-06-02 12:00 |
23:03:17.39 |
-11:18:55.7 |
HIP 113779 |
11.54 |
| 2026-06-03 00:00 |
23:03:19.59 |
-11:18:44.0 |
HIP 113779 |
12.01 |
| 2026-06-03 12:00 |
23:03:21.71 |
-11:18:32.7 |
HIP 113779 |
12.48 |
| 2026-06-04 00:00 |
23:03:23.76 |
-11:18:21.9 |
HIP 113779 |
12.94 |
| 2026-06-04 12:00 |
23:03:25.74 |
-11:18:11.6 |
HIP 113779 |
13.38 |
| 2026-06-05 00:00 |
23:03:27.64 |
-11:18:01.7 |
HIP 113779 |
13.82 |
| 2026-06-05 12:00 |
23:03:29.47 |
-11:17:52.3 |
HIP 113779 |
14.24 |
| 2026-06-06 00:00 |
23:03:31.23 |
-11:17:43.3 |
HIP 113779 |
14.65 |
| 2026-06-06 12:00 |
23:03:32.91 |
-11:17:34.8 |
HIP 113779 |
15.04 |
| 2026-06-07 00:00 |
23:03:34.52 |
-11:17:26.7 |
HIP 113779 |
15.42 |
| 2026-06-07 12:00 |
23:03:36.06 |
-11:17:19.1 |
HIP 113779 |
15.78 |
| 2026-06-08 00:00 |
23:03:37.52 |
-11:17:11.9 |
HIP 113779 |
16.13 |
| 2026-06-08 12:00 |
23:03:38.91 |
-11:17:05.2 |
HIP 113779 |
16.46 |
| 2026-06-09 00:00 |
23:03:40.22 |
-11:16:58.9 |
HIP 113779 |
16.78 |
| 2026-06-09 12:00 |
23:03:41.46 |
-11:16:53.1 |
HIP 113779 |
17.07 |
| 2026-06-10 00:00 |
23:03:42.63 |
-11:16:47.7 |
HIP 113779 |
17.35 |
| 2026-06-10 12:00 |
23:03:43.72 |
-11:16:42.8 |
HIP 113779 |
17.62 |
| 2026-06-11 00:00 |
23:03:44.73 |
-11:16:38.4 |
HIP 113779 |
17.86 |
| 2026-06-11 12:00 |
23:03:45.67 |
-11:16:34.4 |
HIP 113779 |
18.09 |
| 2026-06-12 00:00 |
23:03:46.54 |
-11:16:30.8 |
HIP 113779 |
18.30 |
| 2026-06-12 12:00 |
23:03:47.32 |
-11:16:27.8 |
HIP 113779 |
18.49 |
| 2026-06-13 00:00 |
23:03:48.04 |
-11:16:25.1 |
HIP 113779 |
18.67 |
| 2026-06-13 12:00 |
23:03:48.68 |
-11:16:22.9 |
HIP 113779 |
18.82 |
| 2026-06-14 00:00 |
23:03:49.24 |
-11:16:21.2 |
HIP 113779 |
18.96 |
| 2026-06-14 12:00 |
23:03:49.72 |
-11:16:19.9 |
HIP 113779 |
19.08 |
| 2026-06-15 00:00 |
23:03:50.13 |
-11:16:19.1 |
HIP 113779 |
19.18 |
| 2026-06-15 12:00 |
23:03:50.47 |
-11:16:18.7 |
HIP 113779 |
19.26 |
| 2026-06-16 00:00 |
23:03:50.73 |
-11:16:18.7 |
HIP 113779 |
19.32 |
| 2026-06-16 12:00 |
23:03:50.91 |
-11:16:19.3 |
HIP 113779 |
19.37 |
| 2026-06-17 00:00 |
23:03:51.02 |
-11:16:20.2 |
HIP 113779 |
19.39 |
| 2026-06-17 12:00 |
23:03:51.05 |
-11:16:21.6 |
HIP 113779 |
19.40 |
| 2026-06-18 00:00 |
23:03:51.01 |
-11:16:23.5 |
HIP 113779 |
19.39 |
| 2026-06-18 12:00 |
23:03:50.89 |
-11:16:25.8 |
HIP 113779 |
19.36 |
| 2026-06-19 00:00 |
23:03:50.69 |
-11:16:28.5 |
HIP 113779 |
19.32 |
| 2026-06-19 12:00 |
23:03:50.42 |
-11:16:31.7 |
HIP 113779 |
19.25 |
| 2026-06-20 00:00 |
23:03:50.08 |
-11:16:35.3 |
HIP 113779 |
19.17 |
| 2026-06-20 12:00 |
23:03:49.65 |
-11:16:39.3 |
HIP 113779 |
19.07 |
| 2026-06-21 00:00 |
23:03:49.16 |
-11:16:43.8 |
HIP 113779 |
18.95 |
| 2026-06-21 12:00 |
23:03:48.58 |
-11:16:48.7 |
HIP 113779 |
18.81 |
| 2026-06-22 00:00 |
23:03:47.93 |
-11:16:54.1 |
HIP 113779 |
18.66 |