C/1988 B1 (Shoemaker)
メタデータ
| 項目 |
値 |
| Designation |
C/1988 B1 (Shoemaker) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1987-03-20T04:30:14.852160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:36Z |
| Obs used |
63 |
| NEO |
- |
| M1 |
5.600 |
| 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) |
1988-07-24.0000000 |
| e |
1.00306479 |
| q (au) |
5.030939 |
| a (au) |
-1641.528202 |
| i (deg) |
80.568294 |
| Ω (om, deg) |
325.168069 |
| ω (w, deg) |
124.223736 |
| M (ma, deg) |
0.007288 |
等級
散乱 + 全体線形
$$
M_a = (8.483 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.483 |
| n |
2.000 |
| gf |
0.998 |
| gb |
-0.500 |
| 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 |
07:06:18.24 |
-74:38:10.0 |
HIP 34013 |
14.34 |
| 2026-02-03 12:00 |
07:06:11.41 |
-74:37:57.5 |
HIP 34013 |
13.86 |
| 2026-02-04 00:00 |
07:06:04.61 |
-74:37:44.6 |
HIP 34013 |
13.37 |
| 2026-02-04 12:00 |
07:05:57.84 |
-74:37:31.6 |
HIP 34013 |
12.89 |
| 2026-02-05 00:00 |
07:05:51.11 |
-74:37:18.2 |
HIP 34013 |
12.41 |
| 2026-02-05 12:00 |
07:05:44.42 |
-74:37:04.7 |
HIP 34013 |
11.92 |
| 2026-02-06 00:00 |
07:05:37.76 |
-74:36:50.9 |
HIP 34013 |
11.44 |
| 2026-02-06 12:00 |
07:05:31.14 |
-74:36:36.9 |
HIP 34013 |
10.95 |
| 2026-02-07 00:00 |
07:05:24.56 |
-74:36:22.6 |
HIP 34013 |
10.47 |
| 2026-02-07 12:00 |
07:05:18.02 |
-74:36:08.2 |
HIP 34013 |
9.99 |
| 2026-02-08 00:00 |
07:05:11.51 |
-74:35:53.4 |
HIP 34013 |
9.51 |
| 2026-02-08 12:00 |
07:05:05.05 |
-74:35:38.5 |
HIP 34013 |
9.03 |
| 2026-02-09 00:00 |
07:04:58.62 |
-74:35:23.3 |
HIP 34013 |
8.55 |
| 2026-02-09 12:00 |
07:04:52.24 |
-74:35:07.9 |
HIP 34013 |
8.07 |
| 2026-02-10 00:00 |
07:04:45.89 |
-74:34:52.3 |
HIP 34013 |
7.59 |
| 2026-02-10 12:00 |
07:04:39.59 |
-74:34:36.5 |
HIP 34013 |
7.11 |
| 2026-02-11 00:00 |
07:04:33.33 |
-74:34:20.4 |
HIP 34013 |
6.64 |
| 2026-02-11 12:00 |
07:04:27.11 |
-74:34:04.1 |
HIP 34013 |
6.17 |
| 2026-02-12 00:00 |
07:04:20.94 |
-74:33:47.6 |
HIP 34013 |
5.70 |
| 2026-02-12 12:00 |
07:04:14.80 |
-74:33:30.9 |
HIP 34013 |
5.23 |
| 2026-02-13 00:00 |
07:04:08.72 |
-74:33:13.9 |
HIP 34013 |
4.77 |
| 2026-02-13 12:00 |
07:04:02.67 |
-74:32:56.8 |
HIP 34013 |
4.31 |
| 2026-02-14 00:00 |
07:03:56.68 |
-74:32:39.4 |
HIP 34013 |
3.86 |
| 2026-02-14 12:00 |
07:03:50.72 |
-74:32:21.8 |
HIP 34013 |
3.42 |
| 2026-02-15 00:00 |
07:03:44.82 |
-74:32:04.0 |
HIP 34013 |
3.00 |
| 2026-02-15 12:00 |
07:03:38.96 |
-74:31:46.0 |
HIP 34013 |
2.60 |
| 2026-02-16 00:00 |
07:03:33.14 |
-74:31:27.8 |
HIP 34013 |
2.23 |
| 2026-02-16 12:00 |
07:03:27.38 |
-74:31:09.4 |
HIP 34013 |
1.91 |
| 2026-02-17 00:00 |
07:03:21.66 |
-74:30:50.8 |
HIP 34013 |
1.68 |
| 2026-02-17 12:00 |
07:03:15.99 |
-74:30:32.0 |
HIP 34013 |
1.57 |
| 2026-02-18 00:00 |
07:03:10.37 |
-74:30:13.0 |
HIP 34013 |
1.60 |
| 2026-02-18 12:00 |
07:03:04.80 |
-74:29:53.8 |
HIP 34013 |
1.77 |
| 2026-02-19 00:00 |
07:02:59.28 |
-74:29:34.4 |
HIP 34013 |
2.04 |
| 2026-02-19 12:00 |
07:02:53.81 |
-74:29:14.8 |
HIP 34013 |
2.38 |
| 2026-02-20 00:00 |
07:02:48.39 |
-74:28:55.0 |
HIP 34013 |
2.76 |
| 2026-02-20 12:00 |
07:02:43.02 |
-74:28:35.0 |
HIP 34013 |
3.17 |
| 2026-02-21 00:00 |
07:02:37.70 |
-74:28:14.9 |
HIP 34013 |
3.60 |
| 2026-02-21 12:00 |
07:02:32.43 |
-74:27:54.5 |
HIP 34013 |
4.04 |
| 2026-02-22 00:00 |
07:02:27.22 |
-74:27:34.0 |
HIP 34013 |
4.49 |
| 2026-02-22 12:00 |
07:02:22.05 |
-74:27:13.3 |
HIP 34013 |
4.94 |
| 2026-02-23 00:00 |
07:02:16.94 |
-74:26:52.4 |
HIP 34013 |
5.40 |
| 2026-02-23 12:00 |
07:02:11.89 |
-74:26:31.3 |
HIP 34013 |
5.86 |
| 2026-02-24 00:00 |
07:02:06.88 |
-74:26:10.1 |
HIP 34013 |
6.33 |