C/1985 T1 (Thiele)
メタデータ
| 項目 |
値 |
| Designation |
C/1985 T1 (Thiele) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1985-12-19T05:04:22.480320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:33Z |
| Obs used |
133 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
13.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1985-12-16.0000000 |
| e |
0.98328249 |
| q (au) |
1.317141 |
| a (au) |
78.788093 |
| i (deg) |
139.069283 |
| Ω (om, deg) |
53.012812 |
| ω (w, deg) |
53.000230 |
| M (ma, deg) |
359.995474 |
等級
散乱 + 全体線形
$$
M_a = (6.377 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.377 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1985-10-09 |
1985-12-15 |
+11.7029 |
-1.679 |
| 1985-12-22 |
1987-04-03 |
+2.7133 |
-0.332 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
12:40:18.31 |
-31:21:04.0 |
HIP 61893 |
24.83 |
| 2026-02-03 12:00 |
12:40:17.06 |
-31:21:10.1 |
HIP 61893 |
24.83 |
| 2026-02-04 00:00 |
12:40:15.78 |
-31:21:16.0 |
HIP 61893 |
24.84 |
| 2026-02-04 12:00 |
12:40:14.49 |
-31:21:21.8 |
HIP 61893 |
24.86 |
| 2026-02-05 00:00 |
12:40:13.19 |
-31:21:27.4 |
HIP 61893 |
24.88 |
| 2026-02-05 12:00 |
12:40:11.86 |
-31:21:32.9 |
HIP 61893 |
24.91 |
| 2026-02-06 00:00 |
12:40:10.53 |
-31:21:38.2 |
HIP 61893 |
24.95 |
| 2026-02-06 12:00 |
12:40:09.17 |
-31:21:43.4 |
HIP 61893 |
24.99 |
| 2026-02-07 00:00 |
12:40:07.80 |
-31:21:48.5 |
HIP 61893 |
25.05 |
| 2026-02-07 12:00 |
12:40:06.42 |
-31:21:53.4 |
HIP 61893 |
25.11 |
| 2026-02-08 00:00 |
12:40:05.01 |
-31:21:58.1 |
HIP 61893 |
25.17 |
| 2026-02-08 12:00 |
12:40:03.60 |
-31:22:02.7 |
HIP 61893 |
25.25 |
| 2026-02-09 00:00 |
12:40:02.16 |
-31:22:07.2 |
HIP 61893 |
25.33 |
| 2026-02-09 12:00 |
12:40:00.72 |
-31:22:11.5 |
HIP 61893 |
25.42 |
| 2026-02-10 00:00 |
12:39:59.25 |
-31:22:15.6 |
HIP 61893 |
25.51 |
| 2026-02-10 12:00 |
12:39:57.78 |
-31:22:19.6 |
HIP 61893 |
25.62 |
| 2026-02-11 00:00 |
12:39:56.28 |
-31:22:23.5 |
HIP 61893 |
25.73 |
| 2026-02-11 12:00 |
12:39:54.77 |
-31:22:27.2 |
HIP 61893 |
25.84 |
| 2026-02-12 00:00 |
12:39:53.25 |
-31:22:30.8 |
HIP 61893 |
25.97 |
| 2026-02-12 12:00 |
12:39:51.71 |
-31:22:34.2 |
HIP 61893 |
26.10 |
| 2026-02-13 00:00 |
12:39:50.16 |
-31:22:37.4 |
HIP 61893 |
26.24 |
| 2026-02-13 12:00 |
12:39:48.59 |
-31:22:40.5 |
HIP 61893 |
26.39 |
| 2026-02-14 00:00 |
12:39:47.01 |
-31:22:43.5 |
HIP 61893 |
26.55 |
| 2026-02-14 12:00 |
12:39:45.42 |
-31:22:46.2 |
HIP 61893 |
26.71 |
| 2026-02-15 00:00 |
12:39:43.81 |
-31:22:48.9 |
HIP 61893 |
26.88 |
| 2026-02-15 12:00 |
12:39:42.19 |
-31:22:51.4 |
HIP 61893 |
27.06 |
| 2026-02-16 00:00 |
12:39:40.55 |
-31:22:53.7 |
HIP 61893 |
27.24 |
| 2026-02-16 12:00 |
12:39:38.90 |
-31:22:55.9 |
HIP 61893 |
27.43 |
| 2026-02-17 00:00 |
12:39:37.23 |
-31:22:57.9 |
HIP 61893 |
27.63 |
| 2026-02-17 12:00 |
12:39:35.55 |
-31:22:59.7 |
HIP 61893 |
27.84 |
| 2026-02-18 00:00 |
12:39:33.86 |
-31:23:01.5 |
HIP 61893 |
28.05 |
| 2026-02-18 12:00 |
12:39:32.16 |
-31:23:03.0 |
HIP 61893 |
28.27 |
| 2026-02-19 00:00 |
12:39:30.44 |
-31:23:04.4 |
HIP 61603 |
28.31 |
| 2026-02-19 12:00 |
12:39:28.71 |
-31:23:05.7 |
HIP 61603 |
27.95 |
| 2026-02-20 00:00 |
12:39:26.97 |
-31:23:06.7 |
HIP 61603 |
27.59 |
| 2026-02-20 12:00 |
12:39:25.21 |
-31:23:07.7 |
HIP 61603 |
27.23 |
| 2026-02-21 00:00 |
12:39:23.44 |
-31:23:08.5 |
HIP 61603 |
26.87 |
| 2026-02-21 12:00 |
12:39:21.66 |
-31:23:09.1 |
HIP 61603 |
26.51 |
| 2026-02-22 00:00 |
12:39:19.87 |
-31:23:09.5 |
HIP 61603 |
26.15 |
| 2026-02-22 12:00 |
12:39:18.06 |
-31:23:09.9 |
HIP 61603 |
25.79 |
| 2026-02-23 00:00 |
12:39:16.25 |
-31:23:10.0 |
HIP 61603 |
25.43 |
| 2026-02-23 12:00 |
12:39:14.42 |
-31:23:10.0 |
HIP 61603 |
25.06 |
| 2026-02-24 00:00 |
12:39:12.58 |
-31:23:09.9 |
HIP 61603 |
24.70 |