C/2015 T4 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2015 T4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-06-18T22:43:23.779200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:15Z |
| Obs used |
345 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
16.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-12-16.0000000 |
| e |
0.97361730 |
| q (au) |
2.296377 |
| a (au) |
87.040989 |
| i (deg) |
87.917192 |
| Ω (om, deg) |
251.787616 |
| ω (w, deg) |
270.135756 |
| M (ma, deg) |
359.774313 |
等級
散乱 + 全体線形
$$
M_a = (8.288 + 5.229\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.288 |
| n |
5.229 |
| gf |
0.998 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
9.998 |
| 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 |
17:28:10.42 |
+31:07:38.6 |
HIP 85378 |
18.86 |
| 2026-02-03 12:00 |
17:28:14.35 |
+31:08:34.3 |
HIP 85381 |
19.46 |
| 2026-02-04 00:00 |
17:28:18.24 |
+31:09:30.3 |
HIP 85381 |
20.07 |
| 2026-02-04 12:00 |
17:28:22.09 |
+31:10:26.8 |
HIP 85381 |
20.74 |
| 2026-02-05 00:00 |
17:28:25.90 |
+31:11:23.6 |
HIP 85381 |
21.44 |
| 2026-02-05 12:00 |
17:28:29.67 |
+31:12:20.7 |
HIP 85381 |
22.19 |
| 2026-02-06 00:00 |
17:28:33.40 |
+31:13:18.3 |
HIP 85381 |
22.97 |
| 2026-02-06 12:00 |
17:28:37.08 |
+31:14:16.1 |
HIP 85381 |
23.78 |
| 2026-02-07 00:00 |
17:28:40.73 |
+31:15:14.3 |
HIP 85381 |
24.62 |
| 2026-02-07 12:00 |
17:28:44.34 |
+31:16:12.9 |
HIP 85381 |
25.48 |
| 2026-02-08 00:00 |
17:28:47.90 |
+31:17:11.8 |
HIP 85381 |
26.37 |
| 2026-02-08 12:00 |
17:28:51.42 |
+31:18:11.0 |
HIP 85381 |
27.28 |
| 2026-02-09 00:00 |
17:28:54.89 |
+31:19:10.6 |
HIP 85715 |
27.52 |
| 2026-02-09 12:00 |
17:28:58.33 |
+31:20:10.5 |
HIP 85715 |
27.20 |
| 2026-02-10 00:00 |
17:29:01.72 |
+31:21:10.7 |
HIP 85715 |
26.96 |
| 2026-02-10 12:00 |
17:29:05.07 |
+31:22:11.3 |
HIP 85715 |
26.78 |
| 2026-02-11 00:00 |
17:29:08.37 |
+31:23:12.1 |
HIP 85715 |
26.66 |
| 2026-02-11 12:00 |
17:29:11.63 |
+31:24:13.3 |
HIP 85715 |
26.62 |
| 2026-02-12 00:00 |
17:29:14.85 |
+31:25:14.8 |
HIP 85715 |
26.64 |
| 2026-02-12 12:00 |
17:29:18.02 |
+31:26:16.6 |
HIP 85715 |
26.73 |
| 2026-02-13 00:00 |
17:29:21.15 |
+31:27:18.7 |
HIP 85715 |
26.89 |
| 2026-02-13 12:00 |
17:29:24.23 |
+31:28:21.2 |
HIP 85715 |
27.11 |
| 2026-02-14 00:00 |
17:29:27.26 |
+31:29:23.9 |
HIP 85715 |
27.40 |
| 2026-02-14 12:00 |
17:29:30.25 |
+31:30:26.9 |
HIP 85715 |
27.74 |
| 2026-02-15 00:00 |
17:29:33.20 |
+31:31:30.2 |
HIP 85715 |
28.15 |
| 2026-02-15 12:00 |
17:29:36.10 |
+31:32:33.8 |
HIP 85715 |
28.62 |
| 2026-02-16 00:00 |
17:29:38.95 |
+31:33:37.6 |
HIP 85715 |
29.14 |
| 2026-02-16 12:00 |
17:29:41.75 |
+31:34:41.8 |
HIP 85715 |
29.71 |
| 2026-02-17 00:00 |
17:29:44.51 |
+31:35:46.2 |
HIP 85715 |
30.32 |
| 2026-02-17 12:00 |
17:29:47.22 |
+31:36:50.9 |
HIP 85715 |
30.99 |
| 2026-02-18 00:00 |
17:29:49.89 |
+31:37:55.8 |
HIP 85715 |
31.69 |
| 2026-02-18 12:00 |
17:29:52.50 |
+31:39:01.0 |
HIP 85715 |
32.44 |
| 2026-02-19 00:00 |
17:29:55.07 |
+31:40:06.5 |
HIP 85715 |
33.21 |
| 2026-02-19 12:00 |
17:29:57.59 |
+31:41:12.2 |
HIP 85715 |
34.03 |
| 2026-02-20 00:00 |
17:30:00.06 |
+31:42:18.2 |
HIP 85715 |
34.87 |
| 2026-02-20 12:00 |
17:30:02.48 |
+31:43:24.4 |
HIP 85715 |
35.75 |
| 2026-02-21 00:00 |
17:30:04.86 |
+31:44:30.8 |
HIP 85715 |
36.65 |
| 2026-02-21 12:00 |
17:30:07.18 |
+31:45:37.5 |
HIP 85715 |
37.57 |
| 2026-02-22 00:00 |
17:30:09.46 |
+31:46:44.4 |
HIP 85715 |
38.52 |
| 2026-02-22 12:00 |
17:30:11.69 |
+31:47:51.5 |
HIP 85883 |
38.07 |
| 2026-02-23 00:00 |
17:30:13.86 |
+31:48:58.8 |
HIP 85883 |
37.33 |
| 2026-02-23 12:00 |
17:30:15.99 |
+31:50:06.4 |
HIP 85883 |
36.63 |
| 2026-02-24 00:00 |
17:30:18.07 |
+31:51:14.2 |
HIP 85883 |
35.96 |