メタデータ
| 項目 |
値 |
| Designation |
485P/Sheppard-Tholen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-10-10T02:23:33.267840Z |
| Orbit solution date (soln_date, UTC) |
2024-10-10T17:21:52Z |
| Obs used |
12 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
19.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2006-01-02T08:50:54.816000Z |
| Discovery magnitude (MPC) |
20.30 V |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2009-04-12.0000000 |
| e |
0.41586197 |
| q (au) |
3.995838 |
| a (au) |
6.840572 |
| i (deg) |
10.009723 |
| Ω (om, deg) |
261.841751 |
| ω (w, deg) |
195.918921 |
| M (ma, deg) |
70.508521 |
等級
散乱 + 全体線形
$$
M_a = (9.238 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.238 |
| n |
6.000 |
| gf |
0.937 |
| gb |
-0.857 |
| k |
1.000 |
| δ90 |
2.963 |
| 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 |
12:50:25.59 |
-14:06:24.5 |
HIP 62508 |
32.24 |
| 2026-07-29 12:00 |
12:50:38.53 |
-14:06:59.7 |
HIP 62508 |
34.53 |
| 2026-07-30 00:00 |
12:50:51.55 |
-14:07:35.7 |
HIP 62508 |
36.97 |
| 2026-07-30 12:00 |
12:51:04.67 |
-14:08:12.4 |
HIP 62747 |
39.11 |
| 2026-07-31 00:00 |
12:51:17.89 |
-14:08:49.9 |
HIP 62853 |
37.47 |
| 2026-07-31 12:00 |
12:51:31.19 |
-14:09:28.2 |
HIP 62853 |
34.95 |
| 2026-08-01 00:00 |
12:51:44.59 |
-14:10:07.1 |
HIP 62853 |
32.53 |
| 2026-08-01 12:00 |
12:51:58.08 |
-14:10:46.8 |
HIP 62853 |
30.27 |
| 2026-08-02 00:00 |
12:52:11.66 |
-14:11:27.3 |
HIP 62853 |
28.20 |
| 2026-08-02 12:00 |
12:52:25.34 |
-14:12:08.5 |
HIP 62853 |
26.37 |
| 2026-08-03 00:00 |
12:52:39.10 |
-14:12:50.4 |
HIP 62853 |
24.86 |
| 2026-08-03 12:00 |
12:52:52.95 |
-14:13:33.1 |
HIP 62853 |
23.73 |
| 2026-08-04 00:00 |
12:53:06.89 |
-14:14:16.5 |
HIP 62976 |
21.31 |
| 2026-08-04 12:00 |
12:53:20.92 |
-14:15:00.6 |
HIP 62976 |
18.28 |
| 2026-08-05 00:00 |
12:53:35.04 |
-14:15:45.4 |
HIP 62976 |
15.41 |
| 2026-08-05 12:00 |
12:53:49.25 |
-14:16:30.9 |
HIP 62976 |
12.83 |
| 2026-08-06 00:00 |
12:54:03.54 |
-14:17:17.1 |
HIP 62976 |
10.79 |
| 2026-08-06 12:00 |
12:54:17.92 |
-14:18:04.1 |
HIP 62976 |
9.66 |
| 2026-08-07 00:00 |
12:54:32.38 |
-14:18:51.8 |
HIP 62976 |
9.77 |
| 2026-08-07 12:00 |
12:54:46.93 |
-14:19:40.1 |
HIP 62976 |
11.11 |
| 2026-08-08 00:00 |
12:55:01.56 |
-14:20:29.2 |
HIP 62976 |
13.34 |
| 2026-08-08 12:00 |
12:55:16.28 |
-14:21:18.9 |
HIP 62976 |
16.11 |
| 2026-08-09 00:00 |
12:55:31.08 |
-14:22:09.3 |
HIP 62976 |
19.19 |
| 2026-08-09 12:00 |
12:55:45.97 |
-14:23:00.5 |
HIP 62976 |
22.47 |
| 2026-08-10 00:00 |
12:56:00.93 |
-14:23:52.3 |
HIP 63257 |
25.30 |
| 2026-08-10 12:00 |
12:56:15.98 |
-14:24:44.8 |
HIP 63257 |
21.57 |
| 2026-08-11 00:00 |
12:56:31.11 |
-14:25:37.9 |
HIP 63257 |
17.82 |
| 2026-08-11 12:00 |
12:56:46.33 |
-14:26:31.7 |
HIP 63257 |
14.06 |
| 2026-08-12 00:00 |
12:57:01.62 |
-14:27:26.2 |
HIP 63257 |
10.31 |
| 2026-08-12 12:00 |
12:57:16.99 |
-14:28:21.4 |
HIP 63257 |
6.60 |
| 2026-08-13 00:00 |
12:57:32.43 |
-14:29:17.2 |
HIP 63257 |
3.20 |
| 2026-08-13 12:00 |
12:57:47.96 |
-14:30:13.7 |
HIP 63257 |
2.58 |
| 2026-08-14 00:00 |
12:58:03.57 |
-14:31:10.8 |
HIP 63257 |
5.78 |
| 2026-08-14 12:00 |
12:58:19.25 |
-14:32:08.5 |
HIP 63257 |
9.53 |
| 2026-08-15 00:00 |
12:58:35.00 |
-14:33:06.9 |
HIP 63257 |
13.40 |
| 2026-08-15 12:00 |
12:58:50.83 |
-14:34:06.0 |
HIP 63257 |
17.32 |
| 2026-08-16 00:00 |
12:59:06.74 |
-14:35:05.6 |
HIP 63257 |
21.27 |
| 2026-08-16 12:00 |
12:59:22.72 |
-14:36:05.9 |
HIP 63257 |
25.25 |
| 2026-08-17 00:00 |
12:59:38.77 |
-14:37:06.8 |
HIP 63436 |
26.11 |
| 2026-08-17 12:00 |
12:59:54.90 |
-14:38:08.3 |
HIP 63436 |
26.78 |
| 2026-08-18 00:00 |
13:00:11.10 |
-14:39:10.4 |
HIP 63436 |
28.04 |
| 2026-08-18 12:00 |
13:00:27.37 |
-14:40:13.1 |
HIP 63436 |
29.82 |
| 2026-08-19 00:00 |
13:00:43.71 |
-14:41:16.4 |
HIP 63436 |
32.03 |