メタデータ
| 項目 |
値 |
| Designation |
C/2026 B3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-05-05T02:44:20.650560Z |
| Orbit solution date (soln_date, UTC) |
2026-06-09T11:12:40Z |
| Obs used |
452 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
10.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2026-01-29T11:54:51.033600Z |
| Discovery magnitude (MPC) |
20.01 i |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2026-02-21.0000000 |
| e |
0.99491260 |
| q (au) |
5.815572 |
| a (au) |
1143.131901 |
| i (deg) |
100.833580 |
| Ω (om, deg) |
346.254917 |
| ω (w, deg) |
205.206918 |
| M (ma, deg) |
359.988828 |
等級
散乱 + 全体線形
$$
M_a = (2.522 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.522 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.944 |
| k |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2025-01-08 |
2026-06-11 |
+13.6396 |
-11.138 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
10:52:09.74 |
+08:42:00.5 |
HIP 53126 |
9.26 |
| 2026-07-29 12:00 |
10:52:17.11 |
+08:38:41.3 |
HIP 53126 |
12.88 |
| 2026-07-30 00:00 |
10:52:24.55 |
+08:35:21.8 |
HIP 53126 |
16.58 |
| 2026-07-30 12:00 |
10:52:32.05 |
+08:32:02.1 |
HIP 53148 |
19.28 |
| 2026-07-31 00:00 |
10:52:39.62 |
+08:28:42.3 |
HIP 53148 |
16.26 |
| 2026-07-31 12:00 |
10:52:47.25 |
+08:25:22.1 |
HIP 53148 |
13.65 |
| 2026-08-01 00:00 |
10:52:54.94 |
+08:22:01.8 |
HIP 53148 |
11.74 |
| 2026-08-01 12:00 |
10:53:02.69 |
+08:18:41.3 |
HIP 53148 |
10.92 |
| 2026-08-02 00:00 |
10:53:10.51 |
+08:15:20.6 |
HIP 53148 |
11.43 |
| 2026-08-02 12:00 |
10:53:18.39 |
+08:11:59.6 |
HIP 53148 |
13.12 |
| 2026-08-03 00:00 |
10:53:26.33 |
+08:08:38.4 |
HIP 53148 |
15.63 |
| 2026-08-03 12:00 |
10:53:34.33 |
+08:05:17.1 |
HIP 53148 |
18.64 |
| 2026-08-04 00:00 |
10:53:42.38 |
+08:01:55.5 |
HIP 53148 |
21.94 |
| 2026-08-04 12:00 |
10:53:50.50 |
+07:58:33.7 |
HIP 53318 |
23.20 |
| 2026-08-05 00:00 |
10:53:58.67 |
+07:55:11.7 |
HIP 53318 |
19.38 |
| 2026-08-05 12:00 |
10:54:06.90 |
+07:51:49.5 |
HIP 53318 |
15.62 |
| 2026-08-06 00:00 |
10:54:15.18 |
+07:48:27.1 |
HIP 53318 |
11.96 |
| 2026-08-06 12:00 |
10:54:23.52 |
+07:45:04.5 |
HIP 53318 |
8.57 |
| 2026-08-07 00:00 |
10:54:31.91 |
+07:41:41.6 |
HIP 53318 |
5.93 |
| 2026-08-07 12:00 |
10:54:40.36 |
+07:38:18.6 |
HIP 53318 |
5.34 |
| 2026-08-08 00:00 |
10:54:48.86 |
+07:34:55.4 |
HIP 53318 |
7.33 |
| 2026-08-08 12:00 |
10:54:57.41 |
+07:31:31.9 |
HIP 53318 |
10.53 |
| 2026-08-09 00:00 |
10:55:06.01 |
+07:28:08.3 |
HIP 53318 |
14.16 |
| 2026-08-09 12:00 |
10:55:14.66 |
+07:24:44.4 |
HIP 53318 |
17.97 |
| 2026-08-10 00:00 |
10:55:23.36 |
+07:21:20.4 |
HIP 53486 |
16.87 |
| 2026-08-10 12:00 |
10:55:32.11 |
+07:17:56.2 |
HIP 53486 |
15.55 |
| 2026-08-11 00:00 |
10:55:40.91 |
+07:14:31.7 |
HIP 53493 |
13.71 |
| 2026-08-11 12:00 |
10:55:49.75 |
+07:11:07.1 |
HIP 53493 |
12.32 |
| 2026-08-12 00:00 |
10:55:58.64 |
+07:07:42.3 |
HIP 53420 |
11.11 |
| 2026-08-12 12:00 |
10:56:07.57 |
+07:04:17.3 |
HIP 53420 |
9.66 |
| 2026-08-13 00:00 |
10:56:16.55 |
+07:00:52.0 |
HIP 53420 |
9.84 |
| 2026-08-13 12:00 |
10:56:25.57 |
+06:57:26.6 |
HIP 53420 |
11.57 |
| 2026-08-14 00:00 |
10:56:34.64 |
+06:54:01.1 |
HIP 53420 |
14.30 |
| 2026-08-14 12:00 |
10:56:43.74 |
+06:50:35.3 |
HIP 53420 |
17.59 |
| 2026-08-15 00:00 |
10:56:52.89 |
+06:47:09.3 |
HIP 53420 |
21.17 |
| 2026-08-15 12:00 |
10:57:02.07 |
+06:43:43.2 |
HIP 53531 |
19.99 |
| 2026-08-16 00:00 |
10:57:11.29 |
+06:40:16.9 |
HIP 53531 |
16.52 |
| 2026-08-16 12:00 |
10:57:20.55 |
+06:36:50.4 |
HIP 53531 |
13.43 |
| 2026-08-17 00:00 |
10:57:29.85 |
+06:33:23.7 |
HIP 53531 |
11.05 |
| 2026-08-17 12:00 |
10:57:39.18 |
+06:29:56.8 |
HIP 53531 |
9.91 |
| 2026-08-18 00:00 |
10:57:48.55 |
+06:26:29.8 |
HIP 53531 |
10.45 |
| 2026-08-18 12:00 |
10:57:57.95 |
+06:23:02.6 |
HIP 53531 |
12.45 |
| 2026-08-19 00:00 |
10:58:07.39 |
+06:19:35.2 |
HIP 53531 |
15.36 |