メタデータ
| 項目 |
値 |
| Designation |
C/2016 T1 (Matheny) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2017-02-01T15:36:06.151680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:26Z |
| Obs used |
130 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-11-25.0000000 |
| e |
0.98175990 |
| q (au) |
2.300016 |
| a (au) |
126.096668 |
| i (deg) |
129.818033 |
| Ω (om, deg) |
56.230143 |
| ω (w, deg) |
137.346507 |
| M (ma, deg) |
359.952215 |
等級
散乱 + 全体線形
$$
M_a = (14.392 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.392 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.503 |
| 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 |
07:53:14.30 |
-27:03:13.1 |
HIP 38545 |
14.40 |
| 2026-07-29 12:00 |
07:53:19.26 |
-27:03:29.1 |
HIP 38545 |
13.82 |
| 2026-07-30 00:00 |
07:53:24.21 |
-27:03:45.5 |
HIP 38545 |
13.31 |
| 2026-07-30 12:00 |
07:53:29.16 |
-27:04:02.3 |
HIP 38545 |
12.88 |
| 2026-07-31 00:00 |
07:53:34.09 |
-27:04:19.6 |
HIP 38545 |
12.52 |
| 2026-07-31 12:00 |
07:53:39.02 |
-27:04:37.3 |
HIP 38545 |
12.25 |
| 2026-08-01 00:00 |
07:53:43.93 |
-27:04:55.4 |
HIP 38545 |
12.07 |
| 2026-08-01 12:00 |
07:53:48.83 |
-27:05:14.0 |
HIP 38545 |
12.00 |
| 2026-08-02 00:00 |
07:53:53.73 |
-27:05:32.9 |
HIP 38545 |
12.02 |
| 2026-08-02 12:00 |
07:53:58.61 |
-27:05:52.3 |
HIP 38545 |
12.14 |
| 2026-08-03 00:00 |
07:54:03.49 |
-27:06:12.2 |
HIP 38545 |
12.35 |
| 2026-08-03 12:00 |
07:54:08.35 |
-27:06:32.4 |
HIP 38545 |
12.66 |
| 2026-08-04 00:00 |
07:54:13.20 |
-27:06:53.1 |
HIP 38545 |
13.05 |
| 2026-08-04 12:00 |
07:54:18.03 |
-27:07:14.2 |
HIP 38545 |
13.52 |
| 2026-08-05 00:00 |
07:54:22.86 |
-27:07:35.8 |
HIP 38545 |
14.05 |
| 2026-08-05 12:00 |
07:54:27.67 |
-27:07:57.7 |
HIP 38545 |
14.65 |
| 2026-08-06 00:00 |
07:54:32.47 |
-27:08:20.1 |
HIP 38545 |
15.30 |
| 2026-08-06 12:00 |
07:54:37.26 |
-27:08:42.9 |
HIP 38733 |
15.69 |
| 2026-08-07 00:00 |
07:54:42.03 |
-27:09:06.1 |
HIP 38733 |
14.69 |
| 2026-08-07 12:00 |
07:54:46.79 |
-27:09:29.7 |
HIP 38733 |
13.71 |
| 2026-08-08 00:00 |
07:54:51.53 |
-27:09:53.7 |
HIP 38733 |
12.77 |
| 2026-08-08 12:00 |
07:54:56.26 |
-27:10:18.1 |
HIP 38733 |
11.87 |
| 2026-08-09 00:00 |
07:55:00.98 |
-27:10:43.0 |
HIP 38733 |
11.01 |
| 2026-08-09 12:00 |
07:55:05.68 |
-27:11:08.3 |
HIP 38733 |
10.21 |
| 2026-08-10 00:00 |
07:55:10.36 |
-27:11:33.9 |
HIP 38733 |
9.48 |
| 2026-08-10 12:00 |
07:55:15.03 |
-27:12:00.0 |
HIP 38733 |
8.85 |
| 2026-08-11 00:00 |
07:55:19.68 |
-27:12:26.5 |
HIP 38733 |
8.33 |
| 2026-08-11 12:00 |
07:55:24.31 |
-27:12:53.4 |
HIP 38733 |
7.94 |
| 2026-08-12 00:00 |
07:55:28.93 |
-27:13:20.6 |
HIP 38733 |
7.70 |
| 2026-08-12 12:00 |
07:55:33.53 |
-27:13:48.3 |
HIP 38733 |
7.64 |
| 2026-08-13 00:00 |
07:55:38.11 |
-27:14:16.4 |
HIP 38733 |
7.74 |
| 2026-08-13 12:00 |
07:55:42.68 |
-27:14:44.9 |
HIP 38733 |
8.01 |
| 2026-08-14 00:00 |
07:55:47.22 |
-27:15:13.7 |
HIP 38733 |
8.43 |
| 2026-08-14 12:00 |
07:55:51.75 |
-27:15:43.0 |
HIP 38733 |
8.97 |
| 2026-08-15 00:00 |
07:55:56.25 |
-27:16:12.6 |
HIP 38733 |
9.62 |
| 2026-08-15 12:00 |
07:56:00.74 |
-27:16:42.7 |
HIP 38733 |
10.35 |
| 2026-08-16 00:00 |
07:56:05.20 |
-27:17:13.1 |
HIP 38733 |
11.16 |
| 2026-08-16 12:00 |
07:56:09.65 |
-27:17:43.9 |
HIP 38733 |
12.01 |
| 2026-08-17 00:00 |
07:56:14.08 |
-27:18:15.0 |
HIP 38733 |
12.91 |
| 2026-08-17 12:00 |
07:56:18.48 |
-27:18:46.6 |
HIP 38733 |
13.84 |
| 2026-08-18 00:00 |
07:56:22.86 |
-27:19:18.5 |
HIP 38733 |
14.80 |
| 2026-08-18 12:00 |
07:56:27.23 |
-27:19:50.8 |
HIP 38733 |
15.79 |
| 2026-08-19 00:00 |
07:56:31.57 |
-27:20:23.4 |
HIP 38733 |
16.79 |