メタデータ
| 項目 |
値 |
| Designation |
C/2022 B4 |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-01-29T21:29:47.313600Z |
| Orbit solution date (soln_date, UTC) |
2022-04-14T14:49:33Z |
| Obs used |
128 |
| NEO |
- |
| M1 |
21.700 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-01-29T11:09:26.064000Z |
| Discovery magnitude (MPC) |
20.81 G |
| Discovery observatory (MPC) |
V00 · Kitt Peak-Bok |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-02-26.0000000 |
| e |
0.99639588 |
| q (au) |
1.379643 |
| a (au) |
382.796465 |
| i (deg) |
20.043251 |
| Ω (om, deg) |
340.661761 |
| ω (w, deg) |
152.955070 |
| M (ma, deg) |
0.003567 |
等級
散乱 + 全体線形
$$
M_a = (20.000 + 5.943\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
5.943 |
| gf |
1.000 |
| gb |
-0.814 |
| k |
0.994 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
18:25:31.44 |
-41:18:30.0 |
HIP 90286 |
3.00 |
| 2026-09-20 12:00 |
18:25:31.44 |
-41:17:49.5 |
HIP 90286 |
3.48 |
| 2026-09-21 00:00 |
18:25:31.53 |
-41:17:09.0 |
HIP 90286 |
4.04 |
| 2026-09-21 12:00 |
18:25:31.71 |
-41:16:28.5 |
HIP 90286 |
4.63 |
| 2026-09-22 00:00 |
18:25:31.99 |
-41:15:48.0 |
HIP 90286 |
5.25 |
| 2026-09-22 12:00 |
18:25:32.36 |
-41:15:07.4 |
HIP 90286 |
5.89 |
| 2026-09-23 00:00 |
18:25:32.82 |
-41:14:26.8 |
HIP 90286 |
6.55 |
| 2026-09-23 12:00 |
18:25:33.37 |
-41:13:46.2 |
HIP 90286 |
7.22 |
| 2026-09-24 00:00 |
18:25:34.02 |
-41:13:05.6 |
HIP 90286 |
7.89 |
| 2026-09-24 12:00 |
18:25:34.76 |
-41:12:24.9 |
HIP 90286 |
8.58 |
| 2026-09-25 00:00 |
18:25:35.59 |
-41:11:44.3 |
HIP 90286 |
9.27 |
| 2026-09-25 12:00 |
18:25:36.51 |
-41:11:03.6 |
HIP 90286 |
9.97 |
| 2026-09-26 00:00 |
18:25:37.53 |
-41:10:23.0 |
HIP 90286 |
10.67 |
| 2026-09-26 12:00 |
18:25:38.63 |
-41:09:42.3 |
HIP 90371 |
10.45 |
| 2026-09-27 00:00 |
18:25:39.83 |
-41:09:01.7 |
HIP 90371 |
9.89 |
| 2026-09-27 12:00 |
18:25:41.12 |
-41:08:21.1 |
HIP 90371 |
9.34 |
| 2026-09-28 00:00 |
18:25:42.50 |
-41:07:40.4 |
HIP 90371 |
8.80 |
| 2026-09-28 12:00 |
18:25:43.96 |
-41:06:59.8 |
HIP 90371 |
8.28 |
| 2026-09-29 00:00 |
18:25:45.52 |
-41:06:19.2 |
HIP 90371 |
7.77 |
| 2026-09-29 12:00 |
18:25:47.17 |
-41:05:38.6 |
HIP 90371 |
7.28 |
| 2026-09-30 00:00 |
18:25:48.91 |
-41:04:58.0 |
HIP 90371 |
6.82 |
| 2026-09-30 12:00 |
18:25:50.74 |
-41:04:17.4 |
HIP 90371 |
6.40 |
| 2026-10-01 00:00 |
18:25:52.66 |
-41:03:36.9 |
HIP 90371 |
6.04 |
| 2026-10-01 12:00 |
18:25:54.67 |
-41:02:56.4 |
HIP 90371 |
5.73 |
| 2026-10-02 00:00 |
18:25:56.76 |
-41:02:15.9 |
HIP 90371 |
5.50 |
| 2026-10-02 12:00 |
18:25:58.95 |
-41:01:35.4 |
HIP 90371 |
5.36 |
| 2026-10-03 00:00 |
18:26:01.22 |
-41:00:55.0 |
HIP 90371 |
5.32 |
| 2026-10-03 12:00 |
18:26:03.59 |
-41:00:14.6 |
HIP 90371 |
5.38 |
| 2026-10-04 00:00 |
18:26:06.04 |
-40:59:34.2 |
HIP 90371 |
5.55 |
| 2026-10-04 12:00 |
18:26:08.58 |
-40:58:53.9 |
HIP 90371 |
5.83 |
| 2026-10-05 00:00 |
18:26:11.20 |
-40:58:13.6 |
HIP 90371 |
6.19 |
| 2026-10-05 12:00 |
18:26:13.92 |
-40:57:33.3 |
HIP 90371 |
6.63 |
| 2026-10-06 00:00 |
18:26:16.72 |
-40:56:53.1 |
HIP 90371 |
7.15 |
| 2026-10-06 12:00 |
18:26:19.61 |
-40:56:12.9 |
HIP 90371 |
7.72 |
| 2026-10-07 00:00 |
18:26:22.59 |
-40:55:32.8 |
HIP 90371 |
8.34 |
| 2026-10-07 12:00 |
18:26:25.65 |
-40:54:52.7 |
HIP 90371 |
9.00 |
| 2026-10-08 00:00 |
18:26:28.80 |
-40:54:12.7 |
HIP 90371 |
9.69 |
| 2026-10-08 12:00 |
18:26:32.04 |
-40:53:32.8 |
HIP 90371 |
10.42 |
| 2026-10-09 00:00 |
18:26:35.36 |
-40:52:52.9 |
HIP 90371 |
11.18 |
| 2026-10-09 12:00 |
18:26:38.77 |
-40:52:13.0 |
HIP 90371 |
11.96 |
| 2026-10-10 00:00 |
18:26:42.26 |
-40:51:33.2 |
HIP 90371 |
12.76 |
| 2026-10-10 12:00 |
18:26:45.84 |
-40:50:53.5 |
HIP 90371 |
13.58 |
| 2026-10-11 00:00 |
18:26:49.50 |
-40:50:13.8 |
HIP 90371 |
14.43 |