メタデータ
| 項目 |
値 |
| Designation |
P/2026 B1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2026-08-12T08:01:53.051520Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T12:12:02Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
17.700 |
| 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) |
2023-06-24.0000000 |
| e |
0.32345368 |
| q (au) |
2.460613 |
| a (au) |
3.637021 |
| i (deg) |
4.009993 |
| Ω (om, deg) |
105.175738 |
| ω (w, deg) |
73.550094 |
| M (ma, deg) |
197.251203 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
08:04:14.85 |
+23:16:44.7 |
HIP 39465 |
8.44 |
| 2026-03-26 12:00 |
08:04:26.68 |
+23:16:16.4 |
HIP 39465 |
10.30 |
| 2026-03-27 00:00 |
08:04:38.91 |
+23:15:46.8 |
HIP 39465 |
12.57 |
| 2026-03-27 12:00 |
08:04:51.52 |
+23:15:15.8 |
HIP 39465 |
15.12 |
| 2026-03-28 00:00 |
08:05:04.53 |
+23:14:43.4 |
HIP 39465 |
17.89 |
| 2026-03-28 12:00 |
08:05:17.92 |
+23:14:09.7 |
HIP 39465 |
20.81 |
| 2026-03-29 00:00 |
08:05:31.69 |
+23:13:34.6 |
HIP 39465 |
23.88 |
| 2026-03-29 12:00 |
08:05:45.85 |
+23:12:58.2 |
HIP 39546 |
26.84 |
| 2026-03-30 00:00 |
08:06:00.38 |
+23:12:20.4 |
HIP 39705 |
28.84 |
| 2026-03-30 12:00 |
08:06:15.29 |
+23:11:41.4 |
HIP 39705 |
26.87 |
| 2026-03-31 00:00 |
08:06:30.58 |
+23:11:00.9 |
HIP 39705 |
25.19 |
| 2026-03-31 12:00 |
08:06:46.24 |
+23:10:19.2 |
HIP 39705 |
23.90 |
| 2026-04-01 00:00 |
08:07:02.27 |
+23:09:36.1 |
HIP 39705 |
23.12 |
| 2026-04-01 12:00 |
08:07:18.66 |
+23:08:51.7 |
HIP 39705 |
22.92 |
| 2026-04-02 00:00 |
08:07:35.43 |
+23:08:06.0 |
HIP 39788 |
21.43 |
| 2026-04-02 12:00 |
08:07:52.55 |
+23:07:18.9 |
HIP 39788 |
20.36 |
| 2026-04-03 00:00 |
08:08:10.04 |
+23:06:30.6 |
HIP 39788 |
20.05 |
| 2026-04-03 12:00 |
08:08:27.88 |
+23:05:40.9 |
HIP 39788 |
20.58 |
| 2026-04-04 00:00 |
08:08:46.08 |
+23:04:49.9 |
HIP 39788 |
21.95 |
| 2026-04-04 12:00 |
08:09:04.64 |
+23:03:57.6 |
HIP 39788 |
24.05 |
| 2026-04-05 00:00 |
08:09:23.55 |
+23:03:04.0 |
HIP 39788 |
26.76 |
| 2026-04-05 12:00 |
08:09:42.80 |
+23:02:09.1 |
HIP 39788 |
29.94 |
| 2026-04-06 00:00 |
08:10:02.41 |
+23:01:12.9 |
HIP 39788 |
33.50 |
| 2026-04-06 12:00 |
08:10:22.36 |
+23:00:15.4 |
HIP 40102 |
32.70 |
| 2026-04-07 00:00 |
08:10:42.65 |
+22:59:16.5 |
HIP 40102 |
31.65 |
| 2026-04-07 12:00 |
08:11:03.29 |
+22:58:16.4 |
HIP 40102 |
31.30 |
| 2026-04-08 00:00 |
08:11:24.26 |
+22:57:15.0 |
HIP 40102 |
31.72 |
| 2026-04-08 12:00 |
08:11:45.57 |
+22:56:12.3 |
HIP 40293 |
29.32 |
| 2026-04-09 00:00 |
08:12:07.21 |
+22:55:08.2 |
HIP 40293 |
25.40 |
| 2026-04-09 12:00 |
08:12:29.19 |
+22:54:02.9 |
HIP 40293 |
21.92 |
| 2026-04-10 00:00 |
08:12:51.50 |
+22:52:56.3 |
HIP 40293 |
19.20 |
| 2026-04-10 12:00 |
08:13:14.13 |
+22:51:48.3 |
HIP 40293 |
17.64 |
| 2026-04-11 00:00 |
08:13:37.09 |
+22:50:39.1 |
HIP 40293 |
17.65 |
| 2026-04-11 12:00 |
08:14:00.38 |
+22:49:28.6 |
HIP 40293 |
19.27 |
| 2026-04-12 00:00 |
08:14:23.98 |
+22:48:16.8 |
HIP 40293 |
22.23 |
| 2026-04-12 12:00 |
08:14:47.91 |
+22:47:03.6 |
HIP 40529 |
25.71 |
| 2026-04-13 00:00 |
08:15:12.15 |
+22:45:49.2 |
HIP 40529 |
21.20 |
| 2026-04-13 12:00 |
08:15:36.70 |
+22:44:33.5 |
HIP 40529 |
17.38 |
| 2026-04-14 00:00 |
08:16:01.57 |
+22:43:16.5 |
HIP 40571 |
13.31 |
| 2026-04-14 12:00 |
08:16:26.75 |
+22:41:58.2 |
HIP 40571 |
8.20 |
| 2026-04-15 00:00 |
08:16:52.24 |
+22:40:38.5 |
HIP 40571 |
5.30 |
| 2026-04-15 12:00 |
08:17:18.03 |
+22:39:17.6 |
HIP 40571 |
7.91 |
| 2026-04-16 00:00 |
08:17:44.13 |
+22:37:55.4 |
HIP 40571 |
13.16 |