メタデータ
| 項目 |
値 |
| Designation |
C/2016 T2 (Matheny) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-12-29T02:20:01.553280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:27Z |
| Obs used |
178 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
11.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-11-29.0000000 |
| e |
0.98125057 |
| q (au) |
1.907813 |
| a (au) |
101.753121 |
| i (deg) |
81.311131 |
| Ω (om, deg) |
339.099229 |
| ω (w, deg) |
92.280552 |
| M (ma, deg) |
359.971099 |
等級
散乱 + 全体線形
$$
M_a = (12.146 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.146 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.879 |
| k |
0.986 |
| δ90 |
9.999 |
| 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 |
09:15:41.20 |
-48:55:08.3 |
HIP 45470 |
21.03 |
| 2026-06-01 12:00 |
09:15:44.00 |
-48:54:14.5 |
HIP 45470 |
20.09 |
| 2026-06-02 00:00 |
09:15:46.84 |
-48:53:21.1 |
HIP 45470 |
19.16 |
| 2026-06-02 12:00 |
09:15:49.74 |
-48:52:28.0 |
HIP 45470 |
18.25 |
| 2026-06-03 00:00 |
09:15:52.70 |
-48:51:35.3 |
HIP 45470 |
17.35 |
| 2026-06-03 12:00 |
09:15:55.71 |
-48:50:42.9 |
HIP 45470 |
16.47 |
| 2026-06-04 00:00 |
09:15:58.77 |
-48:49:50.9 |
HIP 45470 |
15.61 |
| 2026-06-04 12:00 |
09:16:01.89 |
-48:48:59.2 |
HIP 45470 |
14.78 |
| 2026-06-05 00:00 |
09:16:05.05 |
-48:48:07.9 |
HIP 45470 |
13.97 |
| 2026-06-05 12:00 |
09:16:08.27 |
-48:47:17.0 |
HIP 45470 |
13.20 |
| 2026-06-06 00:00 |
09:16:11.55 |
-48:46:26.5 |
HIP 45470 |
12.48 |
| 2026-06-06 12:00 |
09:16:14.87 |
-48:45:36.3 |
HIP 45470 |
11.80 |
| 2026-06-07 00:00 |
09:16:18.24 |
-48:44:46.5 |
HIP 45470 |
11.17 |
| 2026-06-07 12:00 |
09:16:21.67 |
-48:43:57.1 |
HIP 45470 |
10.62 |
| 2026-06-08 00:00 |
09:16:25.15 |
-48:43:08.0 |
HIP 45470 |
10.14 |
| 2026-06-08 12:00 |
09:16:28.68 |
-48:42:19.4 |
HIP 45470 |
9.75 |
| 2026-06-09 00:00 |
09:16:32.26 |
-48:41:31.2 |
HIP 45470 |
9.46 |
| 2026-06-09 12:00 |
09:16:35.89 |
-48:40:43.3 |
HIP 45470 |
9.28 |
| 2026-06-10 00:00 |
09:16:39.56 |
-48:39:55.8 |
HIP 45470 |
9.22 |
| 2026-06-10 12:00 |
09:16:43.29 |
-48:39:08.8 |
HIP 45470 |
9.28 |
| 2026-06-11 00:00 |
09:16:47.07 |
-48:38:22.2 |
HIP 45470 |
9.45 |
| 2026-06-11 12:00 |
09:16:50.89 |
-48:37:35.9 |
HIP 45470 |
9.73 |
| 2026-06-12 00:00 |
09:16:54.77 |
-48:36:50.1 |
HIP 45470 |
10.11 |
| 2026-06-12 12:00 |
09:16:58.69 |
-48:36:04.7 |
HIP 45470 |
10.59 |
| 2026-06-13 00:00 |
09:17:02.66 |
-48:35:19.7 |
HIP 45470 |
11.14 |
| 2026-06-13 12:00 |
09:17:06.68 |
-48:34:35.1 |
HIP 45470 |
11.76 |
| 2026-06-14 00:00 |
09:17:10.74 |
-48:33:51.0 |
HIP 45470 |
12.43 |
| 2026-06-14 12:00 |
09:17:14.86 |
-48:33:07.3 |
HIP 45470 |
13.15 |
| 2026-06-15 00:00 |
09:17:19.01 |
-48:32:24.0 |
HIP 45604 |
12.31 |
| 2026-06-15 12:00 |
09:17:23.22 |
-48:31:41.2 |
HIP 45604 |
11.41 |
| 2026-06-16 00:00 |
09:17:27.47 |
-48:30:58.8 |
HIP 45604 |
10.53 |
| 2026-06-16 12:00 |
09:17:31.76 |
-48:30:16.9 |
HIP 45604 |
9.68 |
| 2026-06-17 00:00 |
09:17:36.10 |
-48:29:35.3 |
HIP 45604 |
8.87 |
| 2026-06-17 12:00 |
09:17:40.48 |
-48:28:54.3 |
HIP 45604 |
8.10 |
| 2026-06-18 00:00 |
09:17:44.91 |
-48:28:13.7 |
HIP 45604 |
7.40 |
| 2026-06-18 12:00 |
09:17:49.38 |
-48:27:33.5 |
HIP 45604 |
6.78 |
| 2026-06-19 00:00 |
09:17:53.90 |
-48:26:53.8 |
HIP 45604 |
6.26 |
| 2026-06-19 12:00 |
09:17:58.45 |
-48:26:14.6 |
HIP 45604 |
5.89 |
| 2026-06-20 00:00 |
09:18:03.05 |
-48:25:35.8 |
HIP 45604 |
5.68 |
| 2026-06-20 12:00 |
09:18:07.69 |
-48:24:57.5 |
HIP 45604 |
5.65 |
| 2026-06-21 00:00 |
09:18:12.38 |
-48:24:19.6 |
HIP 45604 |
5.81 |
| 2026-06-21 12:00 |
09:18:17.10 |
-48:23:42.2 |
HIP 45604 |
6.14 |
| 2026-06-22 00:00 |
09:18:21.87 |
-48:23:05.3 |
HIP 45604 |
6.61 |