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 |
1.000 |
| 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) |
| 2026-07-29 00:00 |
07:15:39.25 |
-73:00:39.6 |
HIP 35123 |
16.18 |
| 2026-07-29 12:00 |
07:15:45.23 |
-73:00:49.8 |
HIP 35123 |
16.35 |
| 2026-07-30 00:00 |
07:15:51.18 |
-73:01:00.3 |
HIP 35123 |
16.53 |
| 2026-07-30 12:00 |
07:15:57.13 |
-73:01:10.9 |
HIP 35123 |
16.74 |
| 2026-07-31 00:00 |
07:16:03.05 |
-73:01:21.8 |
HIP 35123 |
16.95 |
| 2026-07-31 12:00 |
07:16:08.96 |
-73:01:32.8 |
HIP 35123 |
17.18 |
| 2026-08-01 00:00 |
07:16:14.86 |
-73:01:44.1 |
HIP 35123 |
17.42 |
| 2026-08-01 12:00 |
07:16:20.73 |
-73:01:55.7 |
HIP 35123 |
17.68 |
| 2026-08-02 00:00 |
07:16:26.58 |
-73:02:07.4 |
HIP 35123 |
17.95 |
| 2026-08-02 12:00 |
07:16:32.42 |
-73:02:19.3 |
HIP 35123 |
18.23 |
| 2026-08-03 00:00 |
07:16:38.24 |
-73:02:31.5 |
HIP 35123 |
18.52 |
| 2026-08-03 12:00 |
07:16:44.04 |
-73:02:43.9 |
HIP 35123 |
18.82 |
| 2026-08-04 00:00 |
07:16:49.82 |
-73:02:56.4 |
HIP 35123 |
19.13 |
| 2026-08-04 12:00 |
07:16:55.57 |
-73:03:09.2 |
HIP 35123 |
19.45 |
| 2026-08-05 00:00 |
07:17:01.31 |
-73:03:22.3 |
HIP 35123 |
19.78 |
| 2026-08-05 12:00 |
07:17:07.03 |
-73:03:35.5 |
HIP 35123 |
20.11 |
| 2026-08-06 00:00 |
07:17:12.73 |
-73:03:48.9 |
HIP 35123 |
20.46 |
| 2026-08-06 12:00 |
07:17:18.40 |
-73:04:02.6 |
HIP 35123 |
20.81 |
| 2026-08-07 00:00 |
07:17:24.05 |
-73:04:16.4 |
HIP 35123 |
21.17 |
| 2026-08-07 12:00 |
07:17:29.68 |
-73:04:30.5 |
HIP 35123 |
21.54 |
| 2026-08-08 00:00 |
07:17:35.29 |
-73:04:44.8 |
HIP 35123 |
21.92 |
| 2026-08-08 12:00 |
07:17:40.87 |
-73:04:59.3 |
HIP 35123 |
22.30 |
| 2026-08-09 00:00 |
07:17:46.43 |
-73:05:14.0 |
HIP 35123 |
22.69 |
| 2026-08-09 12:00 |
07:17:51.97 |
-73:05:28.9 |
HIP 35123 |
23.08 |
| 2026-08-10 00:00 |
07:17:57.48 |
-73:05:44.0 |
HIP 35123 |
23.48 |
| 2026-08-10 12:00 |
07:18:02.97 |
-73:05:59.3 |
HIP 35123 |
23.88 |
| 2026-08-11 00:00 |
07:18:08.43 |
-73:06:14.8 |
HIP 35123 |
24.29 |
| 2026-08-11 12:00 |
07:18:13.87 |
-73:06:30.6 |
HIP 35123 |
24.70 |
| 2026-08-12 00:00 |
07:18:19.28 |
-73:06:46.5 |
HIP 35123 |
25.12 |
| 2026-08-12 12:00 |
07:18:24.66 |
-73:07:02.6 |
HIP 35123 |
25.54 |
| 2026-08-13 00:00 |
07:18:30.02 |
-73:07:18.9 |
HIP 35123 |
25.96 |
| 2026-08-13 12:00 |
07:18:35.34 |
-73:07:35.5 |
HIP 35123 |
26.39 |
| 2026-08-14 00:00 |
07:18:40.65 |
-73:07:52.2 |
HIP 35123 |
26.82 |
| 2026-08-14 12:00 |
07:18:45.92 |
-73:08:09.1 |
HIP 35123 |
27.26 |
| 2026-08-15 00:00 |
07:18:51.16 |
-73:08:26.3 |
HIP 35123 |
27.70 |
| 2026-08-15 12:00 |
07:18:56.38 |
-73:08:43.6 |
HIP 35123 |
28.14 |
| 2026-08-16 00:00 |
07:19:01.57 |
-73:09:01.1 |
HIP 35123 |
28.58 |
| 2026-08-16 12:00 |
07:19:06.72 |
-73:09:18.8 |
HIP 35123 |
29.03 |
| 2026-08-17 00:00 |
07:19:11.85 |
-73:09:36.7 |
HIP 35123 |
29.48 |
| 2026-08-17 12:00 |
07:19:16.94 |
-73:09:54.8 |
HIP 35123 |
29.93 |
| 2026-08-18 00:00 |
07:19:22.01 |
-73:10:13.1 |
HIP 35123 |
30.38 |
| 2026-08-18 12:00 |
07:19:27.04 |
-73:10:31.6 |
HIP 35123 |
30.84 |
| 2026-08-19 00:00 |
07:19:32.05 |
-73:10:50.3 |
HIP 35123 |
31.30 |