C/2015 T5 (Sheppard-Tholen)
メタデータ
| 項目 |
値 |
| Designation |
C/2015 T5 (Sheppard-Tholen) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-01-24T12:14:36.277440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:15Z |
| Obs used |
22 |
| NEO |
- |
| M1 |
7.700 |
| 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) |
2015-12-20.0000000 |
| e |
0.66608261 |
| q (au) |
9.338302 |
| a (au) |
27.965906 |
| i (deg) |
11.048354 |
| Ω (om, deg) |
311.192699 |
| ω (w, deg) |
61.838999 |
| M (ma, deg) |
359.763346 |
等級
散乱 + 全体線形
$$
M_a = (1.931 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
1.931 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
07:37:35.14 |
+25:13:36.9 |
HIP 37191 |
14.71 |
| 2026-02-03 12:00 |
07:37:29.50 |
+25:13:42.7 |
HIP 37191 |
15.79 |
| 2026-02-04 00:00 |
07:37:23.90 |
+25:13:48.3 |
HIP 37191 |
16.89 |
| 2026-02-04 12:00 |
07:37:18.32 |
+25:13:53.9 |
HIP 37191 |
18.01 |
| 2026-02-05 00:00 |
07:37:12.77 |
+25:13:59.2 |
HIP 37191 |
19.14 |
| 2026-02-05 12:00 |
07:37:07.25 |
+25:14:04.5 |
HIP 37191 |
20.27 |
| 2026-02-06 00:00 |
07:37:01.76 |
+25:14:09.6 |
HIP 37191 |
21.41 |
| 2026-02-06 12:00 |
07:36:56.30 |
+25:14:14.6 |
HIP 37191 |
22.56 |
| 2026-02-07 00:00 |
07:36:50.88 |
+25:14:19.4 |
HIP 37191 |
23.71 |
| 2026-02-07 12:00 |
07:36:45.48 |
+25:14:24.2 |
HIP 37191 |
24.86 |
| 2026-02-08 00:00 |
07:36:40.12 |
+25:14:28.7 |
HIP 37191 |
26.00 |
| 2026-02-08 12:00 |
07:36:34.80 |
+25:14:33.2 |
HIP 36907 |
26.19 |
| 2026-02-09 00:00 |
07:36:29.50 |
+25:14:37.5 |
HIP 36907 |
25.35 |
| 2026-02-09 12:00 |
07:36:24.24 |
+25:14:41.7 |
HIP 36907 |
24.54 |
| 2026-02-10 00:00 |
07:36:19.02 |
+25:14:45.7 |
HIP 36907 |
23.77 |
| 2026-02-10 12:00 |
07:36:13.83 |
+25:14:49.6 |
HIP 36907 |
23.04 |
| 2026-02-11 00:00 |
07:36:08.68 |
+25:14:53.4 |
HIP 36907 |
22.36 |
| 2026-02-11 12:00 |
07:36:03.56 |
+25:14:57.0 |
HIP 36907 |
21.72 |
| 2026-02-12 00:00 |
07:35:58.48 |
+25:15:00.5 |
HIP 36907 |
21.14 |
| 2026-02-12 12:00 |
07:35:53.44 |
+25:15:03.8 |
HIP 36907 |
20.60 |
| 2026-02-13 00:00 |
07:35:48.44 |
+25:15:07.0 |
HIP 36907 |
20.13 |
| 2026-02-13 12:00 |
07:35:43.48 |
+25:15:10.1 |
HIP 36907 |
19.71 |
| 2026-02-14 00:00 |
07:35:38.55 |
+25:15:13.0 |
HIP 36907 |
19.35 |
| 2026-02-14 12:00 |
07:35:33.67 |
+25:15:15.8 |
HIP 36907 |
19.05 |
| 2026-02-15 00:00 |
07:35:28.83 |
+25:15:18.4 |
HIP 36907 |
18.82 |
| 2026-02-15 12:00 |
07:35:24.02 |
+25:15:20.9 |
HIP 36907 |
18.65 |
| 2026-02-16 00:00 |
07:35:19.26 |
+25:15:23.2 |
HIP 36907 |
18.55 |
| 2026-02-16 12:00 |
07:35:14.55 |
+25:15:25.4 |
HIP 36907 |
18.51 |
| 2026-02-17 00:00 |
07:35:09.87 |
+25:15:27.5 |
HIP 36907 |
18.53 |
| 2026-02-17 12:00 |
07:35:05.24 |
+25:15:29.4 |
HIP 36874 |
18.48 |
| 2026-02-18 00:00 |
07:35:00.65 |
+25:15:31.1 |
HIP 36874 |
18.35 |
| 2026-02-18 12:00 |
07:34:56.11 |
+25:15:32.7 |
HIP 36874 |
18.27 |
| 2026-02-19 00:00 |
07:34:51.61 |
+25:15:34.2 |
HIP 36765 |
17.75 |
| 2026-02-19 12:00 |
07:34:47.16 |
+25:15:35.5 |
HIP 36765 |
16.86 |
| 2026-02-20 00:00 |
07:34:42.75 |
+25:15:36.7 |
HIP 36765 |
16.00 |
| 2026-02-20 12:00 |
07:34:38.39 |
+25:15:37.7 |
HIP 36765 |
15.16 |
| 2026-02-21 00:00 |
07:34:34.08 |
+25:15:38.6 |
HIP 36765 |
14.35 |
| 2026-02-21 12:00 |
07:34:29.81 |
+25:15:39.3 |
HIP 36765 |
13.57 |
| 2026-02-22 00:00 |
07:34:25.59 |
+25:15:39.9 |
HIP 36765 |
12.83 |
| 2026-02-22 12:00 |
07:34:21.42 |
+25:15:40.3 |
HIP 36765 |
12.12 |
| 2026-02-23 00:00 |
07:34:17.29 |
+25:15:40.6 |
HIP 36765 |
11.46 |
| 2026-02-23 12:00 |
07:34:13.22 |
+25:15:40.7 |
HIP 36765 |
10.85 |
| 2026-02-24 00:00 |
07:34:09.20 |
+25:15:40.7 |
HIP 36765 |
10.30 |