メタデータ
| 項目 |
値 |
| Designation |
C/1974 V2 (Bennett) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1974-12-01T12:33:48.922560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
14 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1974-11-19.0000000 |
| e |
0.99991026 |
| q (au) |
0.864648 |
| a (au) |
9635.426690 |
| i (deg) |
134.827008 |
| Ω (om, deg) |
51.348253 |
| ω (w, deg) |
324.967581 |
| M (ma, deg) |
359.999987 |
等級
散乱 + 全体線形
$$
M_a = (9.862 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.862 |
| n |
2.000 |
| gf |
0.800 |
| 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) |
| 2026-06-01 00:00 |
17:56:21.17 |
+08:14:44.0 |
HIP 87752 |
23.01 |
| 2026-06-01 12:00 |
17:56:19.69 |
+08:14:47.9 |
HIP 87752 |
22.75 |
| 2026-06-02 00:00 |
17:56:18.19 |
+08:14:51.6 |
HIP 87752 |
22.49 |
| 2026-06-02 12:00 |
17:56:16.70 |
+08:14:55.3 |
HIP 87752 |
22.24 |
| 2026-06-03 00:00 |
17:56:15.20 |
+08:14:58.8 |
HIP 87752 |
21.99 |
| 2026-06-03 12:00 |
17:56:13.70 |
+08:15:02.3 |
HIP 87752 |
21.74 |
| 2026-06-04 00:00 |
17:56:12.19 |
+08:15:05.7 |
HIP 87752 |
21.50 |
| 2026-06-04 12:00 |
17:56:10.68 |
+08:15:09.0 |
HIP 87752 |
21.27 |
| 2026-06-05 00:00 |
17:56:09.16 |
+08:15:12.1 |
HIP 87752 |
21.04 |
| 2026-06-05 12:00 |
17:56:07.65 |
+08:15:15.2 |
HIP 87752 |
20.81 |
| 2026-06-06 00:00 |
17:56:06.12 |
+08:15:18.2 |
HIP 87752 |
20.59 |
| 2026-06-06 12:00 |
17:56:04.60 |
+08:15:21.1 |
HIP 87752 |
20.38 |
| 2026-06-07 00:00 |
17:56:03.07 |
+08:15:23.9 |
HIP 87752 |
20.17 |
| 2026-06-07 12:00 |
17:56:01.54 |
+08:15:26.5 |
HIP 87752 |
19.97 |
| 2026-06-08 00:00 |
17:56:00.01 |
+08:15:29.1 |
HIP 87752 |
19.77 |
| 2026-06-08 12:00 |
17:55:58.47 |
+08:15:31.6 |
HIP 87752 |
19.59 |
| 2026-06-09 00:00 |
17:55:56.93 |
+08:15:34.0 |
HIP 87752 |
19.41 |
| 2026-06-09 12:00 |
17:55:55.39 |
+08:15:36.3 |
HIP 87752 |
19.23 |
| 2026-06-10 00:00 |
17:55:53.84 |
+08:15:38.4 |
HIP 87752 |
19.07 |
| 2026-06-10 12:00 |
17:55:52.30 |
+08:15:40.5 |
HIP 87752 |
18.91 |
| 2026-06-11 00:00 |
17:55:50.75 |
+08:15:42.5 |
HIP 87752 |
18.76 |
| 2026-06-11 12:00 |
17:55:49.19 |
+08:15:44.4 |
HIP 87752 |
18.61 |
| 2026-06-12 00:00 |
17:55:47.64 |
+08:15:46.2 |
HIP 87752 |
18.48 |
| 2026-06-12 12:00 |
17:55:46.08 |
+08:15:47.8 |
HIP 87752 |
18.36 |
| 2026-06-13 00:00 |
17:55:44.53 |
+08:15:49.4 |
HIP 87752 |
18.24 |
| 2026-06-13 12:00 |
17:55:42.97 |
+08:15:50.9 |
HIP 87752 |
18.13 |
| 2026-06-14 00:00 |
17:55:41.41 |
+08:15:52.2 |
HIP 87752 |
18.03 |
| 2026-06-14 12:00 |
17:55:39.84 |
+08:15:53.5 |
HIP 87752 |
17.94 |
| 2026-06-15 00:00 |
17:55:38.28 |
+08:15:54.7 |
HIP 87752 |
17.87 |
| 2026-06-15 12:00 |
17:55:36.72 |
+08:15:55.7 |
HIP 87752 |
17.80 |
| 2026-06-16 00:00 |
17:55:35.15 |
+08:15:56.7 |
HIP 87752 |
17.74 |
| 2026-06-16 12:00 |
17:55:33.58 |
+08:15:57.5 |
HIP 87752 |
17.69 |
| 2026-06-17 00:00 |
17:55:32.02 |
+08:15:58.3 |
HIP 87752 |
17.65 |
| 2026-06-17 12:00 |
17:55:30.45 |
+08:15:58.9 |
HIP 87752 |
17.62 |
| 2026-06-18 00:00 |
17:55:28.88 |
+08:15:59.5 |
HIP 87752 |
17.60 |
| 2026-06-18 12:00 |
17:55:27.31 |
+08:15:59.9 |
HIP 87752 |
17.59 |
| 2026-06-19 00:00 |
17:55:25.74 |
+08:16:00.2 |
HIP 87752 |
17.59 |
| 2026-06-19 12:00 |
17:55:24.17 |
+08:16:00.5 |
HIP 87752 |
17.61 |
| 2026-06-20 00:00 |
17:55:22.60 |
+08:16:00.6 |
HIP 87752 |
17.63 |
| 2026-06-20 12:00 |
17:55:21.03 |
+08:16:00.6 |
HIP 87752 |
17.66 |
| 2026-06-21 00:00 |
17:55:19.46 |
+08:16:00.5 |
HIP 87752 |
17.70 |
| 2026-06-21 12:00 |
17:55:17.89 |
+08:16:00.4 |
HIP 87752 |
17.75 |
| 2026-06-22 00:00 |
17:55:16.32 |
+08:16:00.1 |
HIP 87752 |
17.82 |