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) |
| 2026-07-29 00:00 |
19:24:55.46 |
+60:02:28.7 |
HIP 95375 |
19.31 |
| 2026-07-29 12:00 |
19:24:52.77 |
+60:02:22.2 |
HIP 95375 |
19.32 |
| 2026-07-30 00:00 |
19:24:50.08 |
+60:02:15.6 |
HIP 95375 |
19.33 |
| 2026-07-30 12:00 |
19:24:47.40 |
+60:02:08.8 |
HIP 95375 |
19.36 |
| 2026-07-31 00:00 |
19:24:44.72 |
+60:02:01.9 |
HIP 95375 |
19.40 |
| 2026-07-31 12:00 |
19:24:42.05 |
+60:01:54.7 |
HIP 95375 |
19.44 |
| 2026-08-01 00:00 |
19:24:39.40 |
+60:01:47.4 |
HIP 95375 |
19.49 |
| 2026-08-01 12:00 |
19:24:36.74 |
+60:01:40.0 |
HIP 95375 |
19.56 |
| 2026-08-02 00:00 |
19:24:34.10 |
+60:01:32.3 |
HIP 95375 |
19.63 |
| 2026-08-02 12:00 |
19:24:31.47 |
+60:01:24.5 |
HIP 95375 |
19.71 |
| 2026-08-03 00:00 |
19:24:28.84 |
+60:01:16.5 |
HIP 95375 |
19.80 |
| 2026-08-03 12:00 |
19:24:26.22 |
+60:01:08.4 |
HIP 95375 |
19.90 |
| 2026-08-04 00:00 |
19:24:23.62 |
+60:01:00.1 |
HIP 95375 |
20.01 |
| 2026-08-04 12:00 |
19:24:21.02 |
+60:00:51.6 |
HIP 95375 |
20.12 |
| 2026-08-05 00:00 |
19:24:18.43 |
+60:00:43.0 |
HIP 95375 |
20.25 |
| 2026-08-05 12:00 |
19:24:15.85 |
+60:00:34.2 |
HIP 95375 |
20.38 |
| 2026-08-06 00:00 |
19:24:13.28 |
+60:00:25.2 |
HIP 95375 |
20.52 |
| 2026-08-06 12:00 |
19:24:10.72 |
+60:00:16.0 |
HIP 95375 |
20.67 |
| 2026-08-07 00:00 |
19:24:08.16 |
+60:00:06.7 |
HIP 95375 |
20.82 |
| 2026-08-07 12:00 |
19:24:05.62 |
+59:59:57.3 |
HIP 95375 |
20.99 |
| 2026-08-08 00:00 |
19:24:03.09 |
+59:59:47.6 |
HIP 95375 |
21.16 |
| 2026-08-08 12:00 |
19:24:00.57 |
+59:59:37.8 |
HIP 95375 |
21.33 |
| 2026-08-09 00:00 |
19:23:58.07 |
+59:59:27.9 |
HIP 95375 |
21.52 |
| 2026-08-09 12:00 |
19:23:55.57 |
+59:59:17.7 |
HIP 95375 |
21.71 |
| 2026-08-10 00:00 |
19:23:53.08 |
+59:59:07.5 |
HIP 95375 |
21.91 |
| 2026-08-10 12:00 |
19:23:50.61 |
+59:58:57.0 |
HIP 95375 |
22.11 |
| 2026-08-11 00:00 |
19:23:48.14 |
+59:58:46.4 |
HIP 95375 |
22.32 |
| 2026-08-11 12:00 |
19:23:45.69 |
+59:58:35.7 |
HIP 95375 |
22.54 |
| 2026-08-12 00:00 |
19:23:43.25 |
+59:58:24.7 |
HIP 95375 |
22.76 |
| 2026-08-12 12:00 |
19:23:40.83 |
+59:58:13.7 |
HIP 95375 |
22.99 |
| 2026-08-13 00:00 |
19:23:38.41 |
+59:58:02.4 |
HIP 95375 |
23.22 |
| 2026-08-13 12:00 |
19:23:36.01 |
+59:57:51.0 |
HIP 95375 |
23.46 |
| 2026-08-14 00:00 |
19:23:33.62 |
+59:57:39.5 |
HIP 95375 |
23.71 |
| 2026-08-14 12:00 |
19:23:31.25 |
+59:57:27.8 |
HIP 95375 |
23.96 |
| 2026-08-15 00:00 |
19:23:28.89 |
+59:57:16.0 |
HIP 95375 |
24.21 |
| 2026-08-15 12:00 |
19:23:26.54 |
+59:57:04.0 |
HIP 95375 |
24.47 |
| 2026-08-16 00:00 |
19:23:24.20 |
+59:56:51.8 |
HIP 95375 |
24.73 |
| 2026-08-16 12:00 |
19:23:21.88 |
+59:56:39.5 |
HIP 95375 |
25.00 |
| 2026-08-17 00:00 |
19:23:19.57 |
+59:56:27.1 |
HIP 95375 |
25.27 |
| 2026-08-17 12:00 |
19:23:17.28 |
+59:56:14.5 |
HIP 95375 |
25.54 |
| 2026-08-18 00:00 |
19:23:15.00 |
+59:56:01.7 |
HIP 95375 |
25.82 |
| 2026-08-18 12:00 |
19:23:12.74 |
+59:55:48.8 |
HIP 95375 |
26.10 |
| 2026-08-19 00:00 |
19:23:10.49 |
+59:55:35.8 |
HIP 95375 |
26.39 |