55P/Tempel-Tuttle
メタデータ
| 項目 |
値 |
| Designation |
55P/Tempel-Tuttle |
| Type |
P |
| Perihelion (tp_cal, UTC) |
1998-02-28T02:20:44.226240Z |
| Orbit solution date (soln_date, UTC) |
2002-01-03T16:05:39Z |
| Obs used |
392 |
| NEO |
Yes |
| M1 |
10.000 |
| K1 |
25.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1998-08-15.0000000 |
| e |
0.90555272 |
| q (au) |
0.976428 |
| a (au) |
10.338338 |
| i (deg) |
162.486575 |
| Ω (om, deg) |
235.270989 |
| ω (w, deg) |
172.500274 |
| M (ma, deg) |
4.978340 |
等級
散乱 + 全体線形
$$
M_a = (8.798 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.798 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
| 1996-05-12 |
1997-11-02 |
-0.8707 |
+0.580 |
| 1997-11-02 |
1997-11-30 |
-31.7617 |
+10.265 |
| 1997-11-30 |
1998-01-01 |
+23.3793 |
-2.173 |
| 1998-01-01 |
1998-01-27 |
+2.3625 |
+0.123 |
| 1998-01-27 |
1998-02-28 |
+21.4365 |
-0.358 |
| 1998-02-28 |
1998-07-05 |
+8.1608 |
-1.482 |
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 |
15:09:53.31 |
-14:14:23.2 |
HIP 74145 |
18.97 |
| 2026-02-03 12:00 |
15:09:53.65 |
-14:14:11.9 |
HIP 74145 |
18.88 |
| 2026-02-04 00:00 |
15:09:53.91 |
-14:14:00.3 |
HIP 74145 |
18.77 |
| 2026-02-04 12:00 |
15:09:54.09 |
-14:13:48.3 |
HIP 74145 |
18.65 |
| 2026-02-05 00:00 |
15:09:54.19 |
-14:13:36.0 |
HIP 74145 |
18.52 |
| 2026-02-05 12:00 |
15:09:54.22 |
-14:13:23.3 |
HIP 74145 |
18.37 |
| 2026-02-06 00:00 |
15:09:54.16 |
-14:13:10.3 |
HIP 74145 |
18.20 |
| 2026-02-06 12:00 |
15:09:54.03 |
-14:12:57.0 |
HIP 74145 |
18.02 |
| 2026-02-07 00:00 |
15:09:53.82 |
-14:12:43.3 |
HIP 74145 |
17.82 |
| 2026-02-07 12:00 |
15:09:53.52 |
-14:12:29.2 |
HIP 74145 |
17.60 |
| 2026-02-08 00:00 |
15:09:53.15 |
-14:12:14.8 |
HIP 74145 |
17.37 |
| 2026-02-08 12:00 |
15:09:52.70 |
-14:12:00.1 |
HIP 74145 |
17.12 |
| 2026-02-09 00:00 |
15:09:52.16 |
-14:11:45.0 |
HIP 74145 |
16.85 |
| 2026-02-09 12:00 |
15:09:51.55 |
-14:11:29.6 |
HIP 74145 |
16.56 |
| 2026-02-10 00:00 |
15:09:50.85 |
-14:11:13.8 |
HIP 74145 |
16.26 |
| 2026-02-10 12:00 |
15:09:50.08 |
-14:10:57.6 |
HIP 74145 |
15.94 |
| 2026-02-11 00:00 |
15:09:49.22 |
-14:10:41.1 |
HIP 74145 |
15.60 |
| 2026-02-11 12:00 |
15:09:48.28 |
-14:10:24.3 |
HIP 74145 |
15.24 |
| 2026-02-12 00:00 |
15:09:47.26 |
-14:10:07.1 |
HIP 74145 |
14.86 |
| 2026-02-12 12:00 |
15:09:46.16 |
-14:09:49.6 |
HIP 74145 |
14.47 |
| 2026-02-13 00:00 |
15:09:44.97 |
-14:09:31.7 |
HIP 74145 |
14.06 |
| 2026-02-13 12:00 |
15:09:43.70 |
-14:09:13.4 |
HIP 74145 |
13.62 |
| 2026-02-14 00:00 |
15:09:42.35 |
-14:08:54.8 |
HIP 74145 |
13.17 |
| 2026-02-14 12:00 |
15:09:40.92 |
-14:08:35.9 |
HIP 74145 |
12.70 |
| 2026-02-15 00:00 |
15:09:39.41 |
-14:08:16.6 |
HIP 74145 |
12.22 |
| 2026-02-15 12:00 |
15:09:37.81 |
-14:07:56.9 |
HIP 74145 |
11.71 |
| 2026-02-16 00:00 |
15:09:36.13 |
-14:07:36.9 |
HIP 74145 |
11.18 |
| 2026-02-16 12:00 |
15:09:34.37 |
-14:07:16.6 |
HIP 74145 |
10.64 |
| 2026-02-17 00:00 |
15:09:32.52 |
-14:06:55.9 |
HIP 74145 |
10.08 |
| 2026-02-17 12:00 |
15:09:30.59 |
-14:06:34.8 |
HIP 74145 |
9.50 |
| 2026-02-18 00:00 |
15:09:28.58 |
-14:06:13.4 |
HIP 74145 |
8.90 |
| 2026-02-18 12:00 |
15:09:26.48 |
-14:05:51.7 |
HIP 74145 |
8.28 |
| 2026-02-19 00:00 |
15:09:24.30 |
-14:05:29.6 |
HIP 74145 |
7.65 |
| 2026-02-19 12:00 |
15:09:22.04 |
-14:05:07.2 |
HIP 74145 |
7.00 |
| 2026-02-20 00:00 |
15:09:19.69 |
-14:04:44.4 |
HIP 74145 |
6.34 |
| 2026-02-20 12:00 |
15:09:17.26 |
-14:04:21.2 |
HIP 74145 |
5.66 |
| 2026-02-21 00:00 |
15:09:14.75 |
-14:03:57.7 |
HIP 74145 |
4.98 |
| 2026-02-21 12:00 |
15:09:12.15 |
-14:03:33.9 |
HIP 74145 |
4.29 |
| 2026-02-22 00:00 |
15:09:09.47 |
-14:03:09.7 |
HIP 74145 |
3.61 |
| 2026-02-22 12:00 |
15:09:06.71 |
-14:02:45.2 |
HIP 74145 |
2.96 |
| 2026-02-23 00:00 |
15:09:03.86 |
-14:02:20.3 |
HIP 74145 |
2.38 |
| 2026-02-23 12:00 |
15:09:00.93 |
-14:01:55.1 |
HIP 74145 |
1.97 |
| 2026-02-24 00:00 |
15:08:57.92 |
-14:01:29.6 |
HIP 74145 |
1.87 |