C/1975 T1 (Mori-Sato-Fujikawa)
メタデータ
| 項目 |
値 |
| Designation |
C/1975 T1 (Mori-Sato-Fujikawa) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1975-12-25T21:03:54.645120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:24Z |
| Obs used |
193 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
6.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1975-12-18.0000000 |
| e |
0.99745745 |
| q (au) |
1.603934 |
| a (au) |
630.836848 |
| i (deg) |
91.607721 |
| Ω (om, deg) |
278.678467 |
| ω (w, deg) |
246.241227 |
| M (ma, deg) |
359.999510 |
等級
散乱 + 全体線形
$$
M_a = (4.062 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.062 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.978 |
| δ90 |
1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
18:21:55.59 |
+25:59:03.3 |
HIP 90058 |
17.77 |
| 2026-02-03 12:00 |
18:21:56.98 |
+25:59:15.8 |
HIP 90058 |
17.42 |
| 2026-02-04 00:00 |
18:21:58.37 |
+25:59:28.4 |
HIP 90058 |
17.06 |
| 2026-02-04 12:00 |
18:21:59.74 |
+25:59:41.1 |
HIP 90058 |
16.71 |
| 2026-02-05 00:00 |
18:22:01.10 |
+25:59:53.9 |
HIP 90058 |
16.37 |
| 2026-02-05 12:00 |
18:22:02.46 |
+26:00:06.9 |
HIP 90058 |
16.02 |
| 2026-02-06 00:00 |
18:22:03.80 |
+26:00:20.0 |
HIP 90058 |
15.67 |
| 2026-02-06 12:00 |
18:22:05.14 |
+26:00:33.2 |
HIP 90058 |
15.32 |
| 2026-02-07 00:00 |
18:22:06.46 |
+26:00:46.5 |
HIP 90058 |
14.97 |
| 2026-02-07 12:00 |
18:22:07.78 |
+26:00:59.9 |
HIP 90058 |
14.63 |
| 2026-02-08 00:00 |
18:22:09.08 |
+26:01:13.4 |
HIP 90058 |
14.28 |
| 2026-02-08 12:00 |
18:22:10.37 |
+26:01:27.1 |
HIP 90058 |
13.94 |
| 2026-02-09 00:00 |
18:22:11.65 |
+26:01:40.8 |
HIP 90058 |
13.60 |
| 2026-02-09 12:00 |
18:22:12.92 |
+26:01:54.7 |
HIP 90058 |
13.25 |
| 2026-02-10 00:00 |
18:22:14.18 |
+26:02:08.7 |
HIP 90058 |
12.91 |
| 2026-02-10 12:00 |
18:22:15.43 |
+26:02:22.7 |
HIP 90058 |
12.57 |
| 2026-02-11 00:00 |
18:22:16.67 |
+26:02:36.9 |
HIP 90058 |
12.23 |
| 2026-02-11 12:00 |
18:22:17.90 |
+26:02:51.2 |
HIP 90058 |
11.89 |
| 2026-02-12 00:00 |
18:22:19.12 |
+26:03:05.6 |
HIP 90058 |
11.56 |
| 2026-02-12 12:00 |
18:22:20.32 |
+26:03:20.1 |
HIP 90058 |
11.22 |
| 2026-02-13 00:00 |
18:22:21.51 |
+26:03:34.7 |
HIP 90058 |
10.89 |
| 2026-02-13 12:00 |
18:22:22.69 |
+26:03:49.5 |
HIP 90058 |
10.55 |
| 2026-02-14 00:00 |
18:22:23.86 |
+26:04:04.3 |
HIP 90058 |
10.22 |
| 2026-02-14 12:00 |
18:22:25.02 |
+26:04:19.2 |
HIP 90058 |
9.89 |
| 2026-02-15 00:00 |
18:22:26.17 |
+26:04:34.2 |
HIP 90058 |
9.56 |
| 2026-02-15 12:00 |
18:22:27.30 |
+26:04:49.3 |
HIP 90058 |
9.23 |
| 2026-02-16 00:00 |
18:22:28.42 |
+26:05:04.5 |
HIP 90058 |
8.91 |
| 2026-02-16 12:00 |
18:22:29.53 |
+26:05:19.8 |
HIP 90058 |
8.58 |
| 2026-02-17 00:00 |
18:22:30.63 |
+26:05:35.2 |
HIP 90058 |
8.26 |
| 2026-02-17 12:00 |
18:22:31.72 |
+26:05:50.7 |
HIP 90058 |
7.94 |
| 2026-02-18 00:00 |
18:22:32.79 |
+26:06:06.3 |
HIP 90058 |
7.63 |
| 2026-02-18 12:00 |
18:22:33.85 |
+26:06:22.0 |
HIP 90058 |
7.31 |
| 2026-02-19 00:00 |
18:22:34.90 |
+26:06:37.8 |
HIP 90058 |
7.00 |
| 2026-02-19 12:00 |
18:22:35.94 |
+26:06:53.6 |
HIP 90058 |
6.69 |
| 2026-02-20 00:00 |
18:22:36.96 |
+26:07:09.6 |
HIP 90058 |
6.39 |
| 2026-02-20 12:00 |
18:22:37.97 |
+26:07:25.6 |
HIP 90058 |
6.09 |
| 2026-02-21 00:00 |
18:22:38.97 |
+26:07:41.7 |
HIP 90058 |
5.79 |
| 2026-02-21 12:00 |
18:22:39.95 |
+26:07:57.9 |
HIP 90058 |
5.50 |
| 2026-02-22 00:00 |
18:22:40.92 |
+26:08:14.2 |
HIP 90058 |
5.22 |
| 2026-02-22 12:00 |
18:22:41.88 |
+26:08:30.5 |
HIP 90058 |
4.94 |
| 2026-02-23 00:00 |
18:22:42.82 |
+26:08:47.0 |
HIP 90058 |
4.67 |
| 2026-02-23 12:00 |
18:22:43.76 |
+26:09:03.5 |
HIP 90058 |
4.41 |
| 2026-02-24 00:00 |
18:22:44.67 |
+26:09:20.1 |
HIP 90058 |
4.16 |