C/2016 T2 (Matheny)
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 |
-0.878 |
| 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) |
| 2026-02-03 00:00 |
09:32:25.81 |
-52:02:40.0 |
HIP 47000 |
21.47 |
| 2026-02-03 12:00 |
09:32:17.10 |
-52:02:44.9 |
HIP 46611 |
22.35 |
| 2026-02-04 00:00 |
09:32:08.38 |
-52:02:49.0 |
HIP 46611 |
21.22 |
| 2026-02-04 12:00 |
09:31:59.66 |
-52:02:52.5 |
HIP 46611 |
20.11 |
| 2026-02-05 00:00 |
09:31:50.92 |
-52:02:55.2 |
HIP 46611 |
19.04 |
| 2026-02-05 12:00 |
09:31:42.18 |
-52:02:57.3 |
HIP 46611 |
18.01 |
| 2026-02-06 00:00 |
09:31:33.43 |
-52:02:58.6 |
HIP 46611 |
17.04 |
| 2026-02-06 12:00 |
09:31:24.68 |
-52:02:59.3 |
HIP 46611 |
16.13 |
| 2026-02-07 00:00 |
09:31:15.92 |
-52:02:59.2 |
HIP 46611 |
15.29 |
| 2026-02-07 12:00 |
09:31:07.16 |
-52:02:58.5 |
HIP 46611 |
14.53 |
| 2026-02-08 00:00 |
09:30:58.39 |
-52:02:57.0 |
HIP 46611 |
13.87 |
| 2026-02-08 12:00 |
09:30:49.62 |
-52:02:54.8 |
HIP 46611 |
13.33 |
| 2026-02-09 00:00 |
09:30:40.85 |
-52:02:51.9 |
HIP 46611 |
12.92 |
| 2026-02-09 12:00 |
09:30:32.08 |
-52:02:48.3 |
HIP 46611 |
12.65 |
| 2026-02-10 00:00 |
09:30:23.31 |
-52:02:44.0 |
HIP 46611 |
12.53 |
| 2026-02-10 12:00 |
09:30:14.54 |
-52:02:39.1 |
HIP 46611 |
12.57 |
| 2026-02-11 00:00 |
09:30:05.78 |
-52:02:33.4 |
HIP 46611 |
12.76 |
| 2026-02-11 12:00 |
09:29:57.01 |
-52:02:27.0 |
HIP 46502 |
12.01 |
| 2026-02-12 00:00 |
09:29:48.25 |
-52:02:19.9 |
HIP 46502 |
11.19 |
| 2026-02-12 12:00 |
09:29:39.49 |
-52:02:12.1 |
HIP 46502 |
10.48 |
| 2026-02-13 00:00 |
09:29:30.74 |
-52:02:03.6 |
HIP 46502 |
9.92 |
| 2026-02-13 12:00 |
09:29:22.00 |
-52:01:54.4 |
HIP 46502 |
9.53 |
| 2026-02-14 00:00 |
09:29:13.26 |
-52:01:44.5 |
HIP 46502 |
9.34 |
| 2026-02-14 12:00 |
09:29:04.52 |
-52:01:33.9 |
HIP 46502 |
9.35 |
| 2026-02-15 00:00 |
09:28:55.80 |
-52:01:22.7 |
HIP 46502 |
9.56 |
| 2026-02-15 12:00 |
09:28:47.08 |
-52:01:10.7 |
HIP 46502 |
9.97 |
| 2026-02-16 00:00 |
09:28:38.38 |
-52:00:58.0 |
HIP 46502 |
10.55 |
| 2026-02-16 12:00 |
09:28:29.69 |
-52:00:44.7 |
HIP 46502 |
11.27 |
| 2026-02-17 00:00 |
09:28:21.00 |
-52:00:30.7 |
HIP 46502 |
12.10 |
| 2026-02-17 12:00 |
09:28:12.33 |
-52:00:15.9 |
HIP 46502 |
13.04 |
| 2026-02-18 00:00 |
09:28:03.68 |
-52:00:00.6 |
HIP 46502 |
14.05 |
| 2026-02-18 12:00 |
09:27:55.03 |
-51:59:44.5 |
HIP 46502 |
15.12 |
| 2026-02-19 00:00 |
09:27:46.41 |
-51:59:27.7 |
HIP 46340 |
15.91 |
| 2026-02-19 12:00 |
09:27:37.79 |
-51:59:10.3 |
HIP 46340 |
14.96 |
| 2026-02-20 00:00 |
09:27:29.20 |
-51:58:52.2 |
HIP 46340 |
14.08 |
| 2026-02-20 12:00 |
09:27:20.62 |
-51:58:33.4 |
HIP 46340 |
13.26 |
| 2026-02-21 00:00 |
09:27:12.06 |
-51:58:14.0 |
HIP 46340 |
12.53 |
| 2026-02-21 12:00 |
09:27:03.52 |
-51:57:53.9 |
HIP 46340 |
11.90 |
| 2026-02-22 00:00 |
09:26:55.00 |
-51:57:33.1 |
HIP 46340 |
11.39 |
| 2026-02-22 12:00 |
09:26:46.50 |
-51:57:11.7 |
HIP 46340 |
11.02 |
| 2026-02-23 00:00 |
09:26:38.02 |
-51:56:49.6 |
HIP 46340 |
10.79 |
| 2026-02-23 12:00 |
09:26:29.56 |
-51:56:26.9 |
HIP 46340 |
10.72 |
| 2026-02-24 00:00 |
09:26:21.13 |
-51:56:03.5 |
HIP 46340 |
10.80 |