メタデータ
| 項目 |
値 |
| Designation |
C/1941 B1 (Friend-Reese-Honda) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1941-01-20T09:04:01.920000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
29 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1941-01-20.3778000 |
| e |
0.98122100 |
| q (au) |
0.941864 |
| a (au) |
50.155173 |
| i (deg) |
26.275600 |
| Ω (om, deg) |
329.789700 |
| ω (w, deg) |
132.731900 |
| M (ma, deg) |
0.000000 |
等級
散乱 + 全体線形
$$
M_a = (10.927 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.927 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.906 |
| 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) |
| 2026-06-01 00:00 |
18:56:02.03 |
-43:41:38.7 |
HIP 92880 |
5.75 |
| 2026-06-01 12:00 |
18:56:00.40 |
-43:41:44.4 |
HIP 92880 |
5.45 |
| 2026-06-02 00:00 |
18:55:58.76 |
-43:41:50.0 |
HIP 92880 |
5.15 |
| 2026-06-02 12:00 |
18:55:57.11 |
-43:41:55.6 |
HIP 92880 |
4.84 |
| 2026-06-03 00:00 |
18:55:55.45 |
-43:42:01.1 |
HIP 92880 |
4.54 |
| 2026-06-03 12:00 |
18:55:53.79 |
-43:42:06.6 |
HIP 92880 |
4.24 |
| 2026-06-04 00:00 |
18:55:52.11 |
-43:42:12.0 |
HIP 92880 |
3.93 |
| 2026-06-04 12:00 |
18:55:50.42 |
-43:42:17.4 |
HIP 92880 |
3.63 |
| 2026-06-05 00:00 |
18:55:48.73 |
-43:42:22.8 |
HIP 92880 |
3.33 |
| 2026-06-05 12:00 |
18:55:47.03 |
-43:42:28.0 |
HIP 92880 |
3.03 |
| 2026-06-06 00:00 |
18:55:45.32 |
-43:42:33.3 |
HIP 92880 |
2.73 |
| 2026-06-06 12:00 |
18:55:43.60 |
-43:42:38.5 |
HIP 92880 |
2.44 |
| 2026-06-07 00:00 |
18:55:41.88 |
-43:42:43.6 |
HIP 92880 |
2.16 |
| 2026-06-07 12:00 |
18:55:40.14 |
-43:42:48.7 |
HIP 92880 |
1.88 |
| 2026-06-08 00:00 |
18:55:38.40 |
-43:42:53.7 |
HIP 92880 |
1.63 |
| 2026-06-08 12:00 |
18:55:36.65 |
-43:42:58.7 |
HIP 92880 |
1.40 |
| 2026-06-09 00:00 |
18:55:34.89 |
-43:43:03.6 |
HIP 92880 |
1.21 |
| 2026-06-09 12:00 |
18:55:33.13 |
-43:43:08.5 |
HIP 92880 |
1.09 |
| 2026-06-10 00:00 |
18:55:31.36 |
-43:43:13.3 |
HIP 92880 |
1.07 |
| 2026-06-10 12:00 |
18:55:29.58 |
-43:43:18.0 |
HIP 92880 |
1.14 |
| 2026-06-11 00:00 |
18:55:27.79 |
-43:43:22.7 |
HIP 92880 |
1.30 |
| 2026-06-11 12:00 |
18:55:26.00 |
-43:43:27.4 |
HIP 92880 |
1.51 |
| 2026-06-12 00:00 |
18:55:24.20 |
-43:43:32.0 |
HIP 92880 |
1.76 |
| 2026-06-12 12:00 |
18:55:22.40 |
-43:43:36.5 |
HIP 92880 |
2.03 |
| 2026-06-13 00:00 |
18:55:20.59 |
-43:43:41.0 |
HIP 92880 |
2.33 |
| 2026-06-13 12:00 |
18:55:18.77 |
-43:43:45.4 |
HIP 92880 |
2.63 |
| 2026-06-14 00:00 |
18:55:16.94 |
-43:43:49.8 |
HIP 92880 |
2.94 |
| 2026-06-14 12:00 |
18:55:15.11 |
-43:43:54.1 |
HIP 92880 |
3.25 |
| 2026-06-15 00:00 |
18:55:13.28 |
-43:43:58.3 |
HIP 92880 |
3.57 |
| 2026-06-15 12:00 |
18:55:11.43 |
-43:44:02.5 |
HIP 92880 |
3.90 |
| 2026-06-16 00:00 |
18:55:09.59 |
-43:44:06.7 |
HIP 92880 |
4.23 |
| 2026-06-16 12:00 |
18:55:07.73 |
-43:44:10.8 |
HIP 92816 |
4.45 |
| 2026-06-17 00:00 |
18:55:05.88 |
-43:44:14.8 |
HIP 92816 |
4.15 |
| 2026-06-17 12:00 |
18:55:04.01 |
-43:44:18.7 |
HIP 92816 |
3.86 |
| 2026-06-18 00:00 |
18:55:02.14 |
-43:44:22.6 |
HIP 92816 |
3.57 |
| 2026-06-18 12:00 |
18:55:00.27 |
-43:44:26.5 |
HIP 92816 |
3.30 |
| 2026-06-19 00:00 |
18:54:58.39 |
-43:44:30.2 |
HIP 92816 |
3.03 |
| 2026-06-19 12:00 |
18:54:56.51 |
-43:44:34.0 |
HIP 92816 |
2.78 |
| 2026-06-20 00:00 |
18:54:54.63 |
-43:44:37.6 |
HIP 92816 |
2.56 |
| 2026-06-20 12:00 |
18:54:52.73 |
-43:44:41.2 |
HIP 92816 |
2.36 |
| 2026-06-21 00:00 |
18:54:50.84 |
-43:44:44.7 |
HIP 92816 |
2.19 |
| 2026-06-21 12:00 |
18:54:48.94 |
-43:44:48.2 |
HIP 92816 |
2.08 |
| 2026-06-22 00:00 |
18:54:47.04 |
-43:44:51.6 |
HIP 92816 |
2.01 |