メタデータ
| 項目 |
値 |
| Designation |
C/2026 B3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-05-05T02:27:16.922880Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:31Z |
| Obs used |
354 |
| NEO |
- |
| M1 |
6.800 |
| 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) |
2026-02-02.0000000 |
| e |
0.99485767 |
| q (au) |
5.815686 |
| a (au) |
1130.944829 |
| i (deg) |
100.833974 |
| Ω (om, deg) |
346.254808 |
| ω (w, deg) |
205.204590 |
| M (ma, deg) |
359.988154 |
等級
散乱 + 全体線形
$$
M_a = (3.948 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.948 |
| n |
6.000 |
| gf |
0.905 |
| gb |
-0.854 |
| k |
0.997 |
| δ90 |
4.139 |
| 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 |
2026-03-21 |
+13.9428 |
-11.477 |
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) |
| 2026-03-26 00:00 |
11:29:30.40 |
+18:30:50.8 |
HIP 56146 |
15.26 |
| 2026-03-26 12:00 |
11:29:03.41 |
+18:30:15.7 |
HIP 56146 |
21.09 |
| 2026-03-27 00:00 |
11:28:36.48 |
+18:29:39.4 |
HIP 56146 |
27.18 |
| 2026-03-27 12:00 |
11:28:09.60 |
+18:29:01.9 |
HIP 56146 |
33.38 |
| 2026-03-28 00:00 |
11:27:42.79 |
+18:28:23.3 |
HIP 55924 |
33.84 |
| 2026-03-28 12:00 |
11:27:16.05 |
+18:27:43.4 |
HIP 55924 |
33.72 |
| 2026-03-29 00:00 |
11:26:49.38 |
+18:27:02.4 |
HIP 55711 |
33.67 |
| 2026-03-29 12:00 |
11:26:22.77 |
+18:26:20.2 |
HIP 55711 |
28.48 |
| 2026-03-30 00:00 |
11:25:56.24 |
+18:25:36.8 |
HIP 55711 |
23.85 |
| 2026-03-30 12:00 |
11:25:29.78 |
+18:24:52.2 |
HIP 55711 |
20.16 |
| 2026-03-31 00:00 |
11:25:03.40 |
+18:24:06.4 |
HIP 55711 |
17.99 |
| 2026-03-31 12:00 |
11:24:37.10 |
+18:23:19.4 |
HIP 55711 |
17.87 |
| 2026-04-01 00:00 |
11:24:10.89 |
+18:22:31.2 |
HIP 55711 |
19.83 |
| 2026-04-01 12:00 |
11:23:44.76 |
+18:21:41.9 |
HIP 55711 |
23.33 |
| 2026-04-02 00:00 |
11:23:18.72 |
+18:20:51.3 |
HIP 55486 |
23.20 |
| 2026-04-02 12:00 |
11:22:52.76 |
+18:19:59.6 |
HIP 55486 |
17.31 |
| 2026-04-03 00:00 |
11:22:26.90 |
+18:19:06.6 |
HIP 55486 |
11.76 |
| 2026-04-03 12:00 |
11:22:01.14 |
+18:18:12.5 |
HIP 55486 |
7.34 |
| 2026-04-04 00:00 |
11:21:35.47 |
+18:17:17.2 |
HIP 55486 |
6.74 |
| 2026-04-04 12:00 |
11:21:09.90 |
+18:16:20.7 |
HIP 55486 |
10.60 |
| 2026-04-05 00:00 |
11:20:44.43 |
+18:15:23.0 |
HIP 55486 |
15.94 |
| 2026-04-05 12:00 |
11:20:19.07 |
+18:14:24.1 |
HIP 55486 |
21.67 |
| 2026-04-06 00:00 |
11:19:53.81 |
+18:13:24.1 |
HIP 55429 |
27.08 |
| 2026-04-06 12:00 |
11:19:28.66 |
+18:12:22.8 |
HIP 55429 |
30.49 |
| 2026-04-07 00:00 |
11:19:03.62 |
+18:11:20.4 |
HIP 55429 |
34.60 |
| 2026-04-07 12:00 |
11:18:38.69 |
+18:10:16.8 |
HIP 55429 |
39.19 |
| 2026-04-08 00:00 |
11:18:13.88 |
+18:09:12.0 |
HIP 55071 |
38.26 |
| 2026-04-08 12:00 |
11:17:49.19 |
+18:08:06.0 |
HIP 55071 |
35.71 |
| 2026-04-09 00:00 |
11:17:24.61 |
+18:06:58.9 |
HIP 55071 |
34.06 |
| 2026-04-09 12:00 |
11:17:00.16 |
+18:05:50.5 |
HIP 55071 |
33.42 |
| 2026-04-10 00:00 |
11:16:35.82 |
+18:04:41.1 |
HIP 55071 |
33.84 |
| 2026-04-10 12:00 |
11:16:11.62 |
+18:03:30.4 |
HIP 55071 |
35.27 |
| 2026-04-11 00:00 |
11:15:47.54 |
+18:02:18.6 |
HIP 55071 |
37.58 |
| 2026-04-11 12:00 |
11:15:23.58 |
+18:01:05.6 |
HIP 54899 |
39.19 |
| 2026-04-12 00:00 |
11:14:59.77 |
+17:59:51.4 |
HIP 54899 |
36.36 |
| 2026-04-12 12:00 |
11:14:36.08 |
+17:58:36.1 |
HIP 54899 |
34.27 |
| 2026-04-13 00:00 |
11:14:12.53 |
+17:57:19.6 |
HIP 54899 |
33.05 |
| 2026-04-13 12:00 |
11:13:49.11 |
+17:56:02.0 |
HIP 54899 |
32.78 |
| 2026-04-14 00:00 |
11:13:25.83 |
+17:54:43.2 |
HIP 54899 |
33.47 |
| 2026-04-14 12:00 |
11:13:02.70 |
+17:53:23.3 |
HIP 54899 |
35.05 |
| 2026-04-15 00:00 |
11:12:39.71 |
+17:52:02.2 |
HIP 54899 |
37.39 |
| 2026-04-15 12:00 |
11:12:16.86 |
+17:50:40.0 |
HIP 54629 |
37.21 |
| 2026-04-16 00:00 |
11:11:54.15 |
+17:49:16.7 |
HIP 54629 |
35.95 |