メタデータ
| 項目 |
値 |
| Designation |
C/1970 B1 (Daido-Fujikawa) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1970-02-15T19:19:12.423360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:19Z |
| Obs used |
32 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
12.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1970-02-04.0000000 |
| e |
1.00001913 |
| q (au) |
0.065746 |
| a (au) |
-3436.434080 |
| i (deg) |
100.182807 |
| Ω (om, deg) |
30.596034 |
| ω (w, deg) |
266.648729 |
| M (ma, deg) |
-0.000058 |
等級
散乱 + 全体線形
$$
M_a = (10.070 + 5.369\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.070 |
| n |
5.369 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-03-26 00:00 |
19:31:39.49 |
+59:12:21.8 |
HIP 96163 |
16.14 |
| 2026-03-26 12:00 |
19:31:40.28 |
+59:12:42.3 |
HIP 96163 |
15.83 |
| 2026-03-27 00:00 |
19:31:41.05 |
+59:13:02.9 |
HIP 96163 |
15.52 |
| 2026-03-27 12:00 |
19:31:41.79 |
+59:13:23.5 |
HIP 96163 |
15.22 |
| 2026-03-28 00:00 |
19:31:42.51 |
+59:13:44.2 |
HIP 96163 |
14.92 |
| 2026-03-28 12:00 |
19:31:43.21 |
+59:14:04.9 |
HIP 96163 |
14.62 |
| 2026-03-29 00:00 |
19:31:43.88 |
+59:14:25.6 |
HIP 96163 |
14.33 |
| 2026-03-29 12:00 |
19:31:44.53 |
+59:14:46.4 |
HIP 96163 |
14.04 |
| 2026-03-30 00:00 |
19:31:45.16 |
+59:15:07.2 |
HIP 96163 |
13.76 |
| 2026-03-30 12:00 |
19:31:45.76 |
+59:15:28.0 |
HIP 96163 |
13.48 |
| 2026-03-31 00:00 |
19:31:46.35 |
+59:15:48.9 |
HIP 96163 |
13.21 |
| 2026-03-31 12:00 |
19:31:46.90 |
+59:16:09.8 |
HIP 96163 |
12.94 |
| 2026-04-01 00:00 |
19:31:47.44 |
+59:16:30.8 |
HIP 96163 |
12.68 |
| 2026-04-01 12:00 |
19:31:47.95 |
+59:16:51.7 |
HIP 96163 |
12.43 |
| 2026-04-02 00:00 |
19:31:48.44 |
+59:17:12.7 |
HIP 96163 |
12.19 |
| 2026-04-02 12:00 |
19:31:48.91 |
+59:17:33.7 |
HIP 96163 |
11.95 |
| 2026-04-03 00:00 |
19:31:49.35 |
+59:17:54.8 |
HIP 96163 |
11.73 |
| 2026-04-03 12:00 |
19:31:49.77 |
+59:18:15.8 |
HIP 96163 |
11.51 |
| 2026-04-04 00:00 |
19:31:50.16 |
+59:18:36.9 |
HIP 96163 |
11.30 |
| 2026-04-04 12:00 |
19:31:50.53 |
+59:18:58.0 |
HIP 96163 |
11.10 |
| 2026-04-05 00:00 |
19:31:50.88 |
+59:19:19.1 |
HIP 96163 |
10.91 |
| 2026-04-05 12:00 |
19:31:51.21 |
+59:19:40.2 |
HIP 96163 |
10.73 |
| 2026-04-06 00:00 |
19:31:51.51 |
+59:20:01.4 |
HIP 96163 |
10.57 |
| 2026-04-06 12:00 |
19:31:51.79 |
+59:20:22.6 |
HIP 96163 |
10.41 |
| 2026-04-07 00:00 |
19:31:52.04 |
+59:20:43.7 |
HIP 96163 |
10.27 |
| 2026-04-07 12:00 |
19:31:52.27 |
+59:21:04.9 |
HIP 96163 |
10.14 |
| 2026-04-08 00:00 |
19:31:52.48 |
+59:21:26.1 |
HIP 96163 |
10.03 |
| 2026-04-08 12:00 |
19:31:52.66 |
+59:21:47.3 |
HIP 96163 |
9.93 |
| 2026-04-09 00:00 |
19:31:52.82 |
+59:22:08.5 |
HIP 96163 |
9.84 |
| 2026-04-09 12:00 |
19:31:52.96 |
+59:22:29.7 |
HIP 96163 |
9.77 |
| 2026-04-10 00:00 |
19:31:53.07 |
+59:22:50.9 |
HIP 96163 |
9.72 |
| 2026-04-10 12:00 |
19:31:53.16 |
+59:23:12.1 |
HIP 96163 |
9.68 |
| 2026-04-11 00:00 |
19:31:53.22 |
+59:23:33.4 |
HIP 96163 |
9.66 |
| 2026-04-11 12:00 |
19:31:53.26 |
+59:23:54.6 |
HIP 96163 |
9.65 |
| 2026-04-12 00:00 |
19:31:53.28 |
+59:24:15.8 |
HIP 96163 |
9.66 |
| 2026-04-12 12:00 |
19:31:53.27 |
+59:24:37.0 |
HIP 96163 |
9.68 |
| 2026-04-13 00:00 |
19:31:53.24 |
+59:24:58.2 |
HIP 96163 |
9.72 |
| 2026-04-13 12:00 |
19:31:53.18 |
+59:25:19.4 |
HIP 96163 |
9.78 |
| 2026-04-14 00:00 |
19:31:53.11 |
+59:25:40.5 |
HIP 96163 |
9.85 |
| 2026-04-14 12:00 |
19:31:53.00 |
+59:26:01.7 |
HIP 96163 |
9.94 |
| 2026-04-15 00:00 |
19:31:52.88 |
+59:26:22.9 |
HIP 96163 |
10.04 |
| 2026-04-15 12:00 |
19:31:52.72 |
+59:26:44.0 |
HIP 96163 |
10.16 |
| 2026-04-16 00:00 |
19:31:52.55 |
+59:27:05.1 |
HIP 96163 |
10.28 |