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) |
| 2026-06-01 00:00 |
07:44:11.40 |
-27:24:30.1 |
HIP 37646 |
16.28 |
| 2026-06-01 12:00 |
07:44:15.05 |
-27:23:52.8 |
HIP 37646 |
16.22 |
| 2026-06-02 00:00 |
07:44:18.74 |
-27:23:15.9 |
HIP 37646 |
16.24 |
| 2026-06-02 12:00 |
07:44:22.45 |
-27:22:39.5 |
HIP 37646 |
16.33 |
| 2026-06-03 00:00 |
07:44:26.19 |
-27:22:03.5 |
HIP 37646 |
16.49 |
| 2026-06-03 12:00 |
07:44:29.96 |
-27:21:27.9 |
HIP 37646 |
16.72 |
| 2026-06-04 00:00 |
07:44:33.76 |
-27:20:52.8 |
HIP 37646 |
17.02 |
| 2026-06-04 12:00 |
07:44:37.59 |
-27:20:18.0 |
HIP 37646 |
17.39 |
| 2026-06-05 00:00 |
07:44:41.44 |
-27:19:43.8 |
HIP 37646 |
17.82 |
| 2026-06-05 12:00 |
07:44:45.33 |
-27:19:09.9 |
HIP 37646 |
18.31 |
| 2026-06-06 00:00 |
07:44:49.24 |
-27:18:36.5 |
HIP 37646 |
18.84 |
| 2026-06-06 12:00 |
07:44:53.18 |
-27:18:03.5 |
HIP 37646 |
19.43 |
| 2026-06-07 00:00 |
07:44:57.15 |
-27:17:31.0 |
HIP 37646 |
20.06 |
| 2026-06-07 12:00 |
07:45:01.14 |
-27:16:58.8 |
HIP 37646 |
20.73 |
| 2026-06-08 00:00 |
07:45:05.16 |
-27:16:27.2 |
HIP 37890 |
20.97 |
| 2026-06-08 12:00 |
07:45:09.21 |
-27:15:56.0 |
HIP 37890 |
20.05 |
| 2026-06-09 00:00 |
07:45:13.28 |
-27:15:25.2 |
HIP 37890 |
19.14 |
| 2026-06-09 12:00 |
07:45:17.38 |
-27:14:54.8 |
HIP 37890 |
18.25 |
| 2026-06-10 00:00 |
07:45:21.51 |
-27:14:24.9 |
HIP 37890 |
17.38 |
| 2026-06-10 12:00 |
07:45:25.66 |
-27:13:55.5 |
HIP 37890 |
16.54 |
| 2026-06-11 00:00 |
07:45:29.83 |
-27:13:26.5 |
HIP 37890 |
15.73 |
| 2026-06-11 12:00 |
07:45:34.03 |
-27:12:58.0 |
HIP 37890 |
14.95 |
| 2026-06-12 00:00 |
07:45:38.26 |
-27:12:29.9 |
HIP 37890 |
14.21 |
| 2026-06-12 12:00 |
07:45:42.50 |
-27:12:02.3 |
HIP 37890 |
13.52 |
| 2026-06-13 00:00 |
07:45:46.78 |
-27:11:35.1 |
HIP 37890 |
12.88 |
| 2026-06-13 12:00 |
07:45:51.07 |
-27:11:08.4 |
HIP 37890 |
12.31 |
| 2026-06-14 00:00 |
07:45:55.39 |
-27:10:42.1 |
HIP 37890 |
11.81 |
| 2026-06-14 12:00 |
07:45:59.73 |
-27:10:16.3 |
HIP 37890 |
11.39 |
| 2026-06-15 00:00 |
07:46:04.09 |
-27:09:51.0 |
HIP 37890 |
11.07 |
| 2026-06-15 12:00 |
07:46:08.47 |
-27:09:26.1 |
HIP 37890 |
10.86 |
| 2026-06-16 00:00 |
07:46:12.88 |
-27:09:01.7 |
HIP 37890 |
10.75 |
| 2026-06-16 12:00 |
07:46:17.31 |
-27:08:37.7 |
HIP 37890 |
10.76 |
| 2026-06-17 00:00 |
07:46:21.75 |
-27:08:14.2 |
HIP 37890 |
10.88 |
| 2026-06-17 12:00 |
07:46:26.22 |
-27:07:51.2 |
HIP 37890 |
11.11 |
| 2026-06-18 00:00 |
07:46:30.71 |
-27:07:28.7 |
HIP 37890 |
11.44 |
| 2026-06-18 12:00 |
07:46:35.22 |
-27:07:06.6 |
HIP 37890 |
11.87 |
| 2026-06-19 00:00 |
07:46:39.74 |
-27:06:44.9 |
HIP 37890 |
12.39 |
| 2026-06-19 12:00 |
07:46:44.29 |
-27:06:23.8 |
HIP 37890 |
12.98 |
| 2026-06-20 00:00 |
07:46:48.85 |
-27:06:03.1 |
HIP 37890 |
13.64 |
| 2026-06-20 12:00 |
07:46:53.43 |
-27:05:42.9 |
HIP 37890 |
14.35 |
| 2026-06-21 00:00 |
07:46:58.03 |
-27:05:23.1 |
HIP 37890 |
15.12 |
| 2026-06-21 12:00 |
07:47:02.65 |
-27:05:03.8 |
HIP 37890 |
15.92 |
| 2026-06-22 00:00 |
07:47:07.29 |
-27:04:45.0 |
HIP 37890 |
16.77 |