C/1976 D2 (Schuster)
メタデータ
| 項目 |
値 |
| Designation |
C/1976 D2 (Schuster) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1975-01-14T16:56:09.628800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:24Z |
| Obs used |
54 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
4.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1976-07-08.0000000 |
| e |
1.00111947 |
| q (au) |
6.879571 |
| a (au) |
-6145.360914 |
| i (deg) |
112.026906 |
| Ω (om, deg) |
22.785994 |
| ω (w, deg) |
193.366827 |
| M (ma, deg) |
0.001105 |
等級
散乱 + 全体線形
$$
M_a = (-1.560 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-1.560 |
| n |
6.000 |
| gf |
0.970 |
| gb |
-0.828 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
02:24:05.93 |
-07:56:51.5 |
HIP 11232 |
7.56 |
| 2026-02-03 12:00 |
02:24:06.02 |
-07:56:40.3 |
HIP 11232 |
7.47 |
| 2026-02-04 00:00 |
02:24:06.12 |
-07:56:29.2 |
HIP 11232 |
7.38 |
| 2026-02-04 12:00 |
02:24:06.23 |
-07:56:17.9 |
HIP 11232 |
7.29 |
| 2026-02-05 00:00 |
02:24:06.36 |
-07:56:06.6 |
HIP 11232 |
7.20 |
| 2026-02-05 12:00 |
02:24:06.51 |
-07:55:55.3 |
HIP 11232 |
7.12 |
| 2026-02-06 00:00 |
02:24:06.67 |
-07:55:43.9 |
HIP 11232 |
7.03 |
| 2026-02-06 12:00 |
02:24:06.84 |
-07:55:32.4 |
HIP 11232 |
6.94 |
| 2026-02-07 00:00 |
02:24:07.02 |
-07:55:20.9 |
HIP 11232 |
6.86 |
| 2026-02-07 12:00 |
02:24:07.22 |
-07:55:09.4 |
HIP 11232 |
6.77 |
| 2026-02-08 00:00 |
02:24:07.43 |
-07:54:57.8 |
HIP 11232 |
6.69 |
| 2026-02-08 12:00 |
02:24:07.66 |
-07:54:46.1 |
HIP 11232 |
6.61 |
| 2026-02-09 00:00 |
02:24:07.90 |
-07:54:34.5 |
HIP 11232 |
6.53 |
| 2026-02-09 12:00 |
02:24:08.15 |
-07:54:22.7 |
HIP 11232 |
6.45 |
| 2026-02-10 00:00 |
02:24:08.42 |
-07:54:11.0 |
HIP 11232 |
6.38 |
| 2026-02-10 12:00 |
02:24:08.70 |
-07:53:59.1 |
HIP 11232 |
6.31 |
| 2026-02-11 00:00 |
02:24:08.99 |
-07:53:47.3 |
HIP 11232 |
6.24 |
| 2026-02-11 12:00 |
02:24:09.30 |
-07:53:35.4 |
HIP 11232 |
6.17 |
| 2026-02-12 00:00 |
02:24:09.62 |
-07:53:23.4 |
HIP 11232 |
6.11 |
| 2026-02-12 12:00 |
02:24:09.95 |
-07:53:11.5 |
HIP 11232 |
6.05 |
| 2026-02-13 00:00 |
02:24:10.30 |
-07:52:59.4 |
HIP 11232 |
5.99 |
| 2026-02-13 12:00 |
02:24:10.66 |
-07:52:47.4 |
HIP 11232 |
5.94 |
| 2026-02-14 00:00 |
02:24:11.04 |
-07:52:35.3 |
HIP 11232 |
5.90 |
| 2026-02-14 12:00 |
02:24:11.43 |
-07:52:23.1 |
HIP 11232 |
5.85 |
| 2026-02-15 00:00 |
02:24:11.83 |
-07:52:11.0 |
HIP 11232 |
5.82 |
| 2026-02-15 12:00 |
02:24:12.24 |
-07:51:58.8 |
HIP 11232 |
5.79 |
| 2026-02-16 00:00 |
02:24:12.67 |
-07:51:46.5 |
HIP 11232 |
5.76 |
| 2026-02-16 12:00 |
02:24:13.11 |
-07:51:34.2 |
HIP 11232 |
5.75 |
| 2026-02-17 00:00 |
02:24:13.57 |
-07:51:21.9 |
HIP 11232 |
5.74 |
| 2026-02-17 12:00 |
02:24:14.03 |
-07:51:09.6 |
HIP 11232 |
5.73 |
| 2026-02-18 00:00 |
02:24:14.51 |
-07:50:57.2 |
HIP 11232 |
5.73 |
| 2026-02-18 12:00 |
02:24:15.01 |
-07:50:44.8 |
HIP 11232 |
5.75 |
| 2026-02-19 00:00 |
02:24:15.51 |
-07:50:32.4 |
HIP 11232 |
5.76 |
| 2026-02-19 12:00 |
02:24:16.03 |
-07:50:20.0 |
HIP 11232 |
5.79 |
| 2026-02-20 00:00 |
02:24:16.56 |
-07:50:07.5 |
HIP 11232 |
5.82 |
| 2026-02-20 12:00 |
02:24:17.11 |
-07:49:55.0 |
HIP 11232 |
5.87 |
| 2026-02-21 00:00 |
02:24:17.66 |
-07:49:42.5 |
HIP 11232 |
5.92 |
| 2026-02-21 12:00 |
02:24:18.23 |
-07:49:29.9 |
HIP 11232 |
5.98 |
| 2026-02-22 00:00 |
02:24:18.82 |
-07:49:17.4 |
HIP 11232 |
6.04 |
| 2026-02-22 12:00 |
02:24:19.41 |
-07:49:04.8 |
HIP 11232 |
6.12 |
| 2026-02-23 00:00 |
02:24:20.02 |
-07:48:52.1 |
HIP 11232 |
6.20 |
| 2026-02-23 12:00 |
02:24:20.64 |
-07:48:39.5 |
HIP 11232 |
6.29 |
| 2026-02-24 00:00 |
02:24:21.27 |
-07:48:26.9 |
HIP 11232 |
6.39 |