C/1974 V1 (van den Bergh)
メタデータ
| 項目 |
値 |
| Designation |
C/1974 V1 (van den Bergh) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1974-08-08T03:12:11.047680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:22Z |
| Obs used |
40 |
| NEO |
- |
| M1 |
6.000 |
| 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) |
1975-03-15.0000000 |
| e |
1.00366502 |
| q (au) |
6.019170 |
| a (au) |
-1642.329256 |
| i (deg) |
60.856171 |
| Ω (om, deg) |
226.103510 |
| ω (w, deg) |
151.794940 |
| M (ma, deg) |
0.003241 |
等級
散乱 + 全体線形
$$
M_a = (9.663 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.663 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-0.963 |
| k |
1.000 |
| δ90 |
9.933 |
| 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) |
| 2026-02-03 00:00 |
10:31:53.54 |
-47:01:01.9 |
HIP 51635 |
10.83 |
| 2026-02-03 12:00 |
10:31:51.55 |
-47:01:05.0 |
HIP 51635 |
11.17 |
| 2026-02-04 00:00 |
10:31:49.55 |
-47:01:07.9 |
HIP 51635 |
11.52 |
| 2026-02-04 12:00 |
10:31:47.54 |
-47:01:10.7 |
HIP 51635 |
11.86 |
| 2026-02-05 00:00 |
10:31:45.52 |
-47:01:13.2 |
HIP 51635 |
12.21 |
| 2026-02-05 12:00 |
10:31:43.50 |
-47:01:15.6 |
HIP 51635 |
12.55 |
| 2026-02-06 00:00 |
10:31:41.46 |
-47:01:17.8 |
HIP 51635 |
12.90 |
| 2026-02-06 12:00 |
10:31:39.43 |
-47:01:19.8 |
HIP 51635 |
13.25 |
| 2026-02-07 00:00 |
10:31:37.38 |
-47:01:21.6 |
HIP 51635 |
13.60 |
| 2026-02-07 12:00 |
10:31:35.33 |
-47:01:23.2 |
HIP 51635 |
13.95 |
| 2026-02-08 00:00 |
10:31:33.27 |
-47:01:24.7 |
HIP 51635 |
14.30 |
| 2026-02-08 12:00 |
10:31:31.21 |
-47:01:25.9 |
HIP 51635 |
14.65 |
| 2026-02-09 00:00 |
10:31:29.14 |
-47:01:27.0 |
HIP 51635 |
15.01 |
| 2026-02-09 12:00 |
10:31:27.06 |
-47:01:27.8 |
HIP 51635 |
15.36 |
| 2026-02-10 00:00 |
10:31:24.98 |
-47:01:28.5 |
HIP 51635 |
15.72 |
| 2026-02-10 12:00 |
10:31:22.90 |
-47:01:29.0 |
HIP 51635 |
16.07 |
| 2026-02-11 00:00 |
10:31:20.81 |
-47:01:29.3 |
HIP 51635 |
16.43 |
| 2026-02-11 12:00 |
10:31:18.71 |
-47:01:29.4 |
HIP 51635 |
16.78 |
| 2026-02-12 00:00 |
10:31:16.61 |
-47:01:29.3 |
HIP 51635 |
17.14 |
| 2026-02-12 12:00 |
10:31:14.50 |
-47:01:29.0 |
HIP 51635 |
17.50 |
| 2026-02-13 00:00 |
10:31:12.39 |
-47:01:28.5 |
HIP 51635 |
17.86 |
| 2026-02-13 12:00 |
10:31:10.27 |
-47:01:27.9 |
HIP 51635 |
18.22 |
| 2026-02-14 00:00 |
10:31:08.15 |
-47:01:27.0 |
HIP 51635 |
18.58 |
| 2026-02-14 12:00 |
10:31:06.03 |
-47:01:26.0 |
HIP 51635 |
18.94 |
| 2026-02-15 00:00 |
10:31:03.90 |
-47:01:24.8 |
HIP 51635 |
19.30 |
| 2026-02-15 12:00 |
10:31:01.77 |
-47:01:23.3 |
HIP 51635 |
19.66 |
| 2026-02-16 00:00 |
10:30:59.64 |
-47:01:21.7 |
HIP 51635 |
20.02 |
| 2026-02-16 12:00 |
10:30:57.50 |
-47:01:19.9 |
HIP 51635 |
20.38 |
| 2026-02-17 00:00 |
10:30:55.36 |
-47:01:17.9 |
HIP 51635 |
20.74 |
| 2026-02-17 12:00 |
10:30:53.21 |
-47:01:15.8 |
HIP 51635 |
21.11 |
| 2026-02-18 00:00 |
10:30:51.07 |
-47:01:13.4 |
HIP 51635 |
21.47 |
| 2026-02-18 12:00 |
10:30:48.92 |
-47:01:10.8 |
HIP 51416 |
21.41 |
| 2026-02-19 00:00 |
10:30:46.77 |
-47:01:08.1 |
HIP 51416 |
21.33 |
| 2026-02-19 12:00 |
10:30:44.61 |
-47:01:05.1 |
HIP 51416 |
21.26 |
| 2026-02-20 00:00 |
10:30:42.46 |
-47:01:02.0 |
HIP 51416 |
21.20 |
| 2026-02-20 12:00 |
10:30:40.30 |
-47:00:58.7 |
HIP 51416 |
21.14 |
| 2026-02-21 00:00 |
10:30:38.14 |
-47:00:55.2 |
HIP 51416 |
21.10 |
| 2026-02-21 12:00 |
10:30:35.98 |
-47:00:51.5 |
HIP 51416 |
21.06 |
| 2026-02-22 00:00 |
10:30:33.82 |
-47:00:47.6 |
HIP 51416 |
21.04 |
| 2026-02-22 12:00 |
10:30:31.66 |
-47:00:43.5 |
HIP 51416 |
21.02 |
| 2026-02-23 00:00 |
10:30:29.50 |
-47:00:39.3 |
HIP 51416 |
21.02 |
| 2026-02-23 12:00 |
10:30:27.34 |
-47:00:34.8 |
HIP 51416 |
21.02 |
| 2026-02-24 00:00 |
10:30:25.17 |
-47:00:30.2 |
HIP 51416 |
21.03 |