C/1974 F1 (Lovas)
メタデータ
| 項目 |
値 |
| Designation |
C/1974 F1 (Lovas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1975-08-22T03:56:03.344640Z |
| Orbit solution date (soln_date, UTC) |
2023-08-28T01:42:36Z |
| Obs used |
137 |
| NEO |
- |
| M1 |
9.000 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1975-04-12.0000000 |
| e |
0.99979749 |
| q (au) |
3.011474 |
| a (au) |
14870.379859 |
| i (deg) |
50.648407 |
| Ω (om, deg) |
12.368086 |
| ω (w, deg) |
261.362838 |
| M (ma, deg) |
359.999928 |
等級
散乱 + 全体線形
$$
M_a = (7.432 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.432 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.727 |
| k |
0.999 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
02:30:55.26 |
+58:47:45.4 |
HIP 11716 |
16.05 |
| 2026-02-03 12:00 |
02:30:55.50 |
+58:47:29.4 |
HIP 11716 |
15.78 |
| 2026-02-04 00:00 |
02:30:55.76 |
+58:47:13.5 |
HIP 11716 |
15.51 |
| 2026-02-04 12:00 |
02:30:56.06 |
+58:46:57.7 |
HIP 11716 |
15.25 |
| 2026-02-05 00:00 |
02:30:56.37 |
+58:46:42.0 |
HIP 11716 |
14.98 |
| 2026-02-05 12:00 |
02:30:56.72 |
+58:46:26.3 |
HIP 11716 |
14.72 |
| 2026-02-06 00:00 |
02:30:57.09 |
+58:46:10.7 |
HIP 11716 |
14.45 |
| 2026-02-06 12:00 |
02:30:57.48 |
+58:45:55.1 |
HIP 11716 |
14.19 |
| 2026-02-07 00:00 |
02:30:57.90 |
+58:45:39.7 |
HIP 11716 |
13.92 |
| 2026-02-07 12:00 |
02:30:58.35 |
+58:45:24.3 |
HIP 11716 |
13.66 |
| 2026-02-08 00:00 |
02:30:58.82 |
+58:45:08.9 |
HIP 11716 |
13.40 |
| 2026-02-08 12:00 |
02:30:59.31 |
+58:44:53.7 |
HIP 11716 |
13.14 |
| 2026-02-09 00:00 |
02:30:59.84 |
+58:44:38.5 |
HIP 11716 |
12.88 |
| 2026-02-09 12:00 |
02:31:00.38 |
+58:44:23.4 |
HIP 11716 |
12.62 |
| 2026-02-10 00:00 |
02:31:00.96 |
+58:44:08.3 |
HIP 11716 |
12.36 |
| 2026-02-10 12:00 |
02:31:01.55 |
+58:43:53.4 |
HIP 11716 |
12.10 |
| 2026-02-11 00:00 |
02:31:02.18 |
+58:43:38.5 |
HIP 11716 |
11.85 |
| 2026-02-11 12:00 |
02:31:02.83 |
+58:43:23.7 |
HIP 11716 |
11.59 |
| 2026-02-12 00:00 |
02:31:03.50 |
+58:43:09.0 |
HIP 11716 |
11.34 |
| 2026-02-12 12:00 |
02:31:04.20 |
+58:42:54.3 |
HIP 11716 |
11.08 |
| 2026-02-13 00:00 |
02:31:04.92 |
+58:42:39.8 |
HIP 11716 |
10.83 |
| 2026-02-13 12:00 |
02:31:05.67 |
+58:42:25.3 |
HIP 11716 |
10.58 |
| 2026-02-14 00:00 |
02:31:06.44 |
+58:42:10.9 |
HIP 11716 |
10.34 |
| 2026-02-14 12:00 |
02:31:07.24 |
+58:41:56.6 |
HIP 11716 |
10.09 |
| 2026-02-15 00:00 |
02:31:08.07 |
+58:41:42.4 |
HIP 11716 |
9.84 |
| 2026-02-15 12:00 |
02:31:08.91 |
+58:41:28.3 |
HIP 11716 |
9.60 |
| 2026-02-16 00:00 |
02:31:09.79 |
+58:41:14.2 |
HIP 11716 |
9.36 |
| 2026-02-16 12:00 |
02:31:10.68 |
+58:41:00.3 |
HIP 11716 |
9.12 |
| 2026-02-17 00:00 |
02:31:11.60 |
+58:40:46.5 |
HIP 11716 |
8.89 |
| 2026-02-17 12:00 |
02:31:12.55 |
+58:40:32.7 |
HIP 11716 |
8.66 |
| 2026-02-18 00:00 |
02:31:13.52 |
+58:40:19.0 |
HIP 11716 |
8.43 |
| 2026-02-18 12:00 |
02:31:14.51 |
+58:40:05.5 |
HIP 11716 |
8.20 |
| 2026-02-19 00:00 |
02:31:15.53 |
+58:39:52.0 |
HIP 11716 |
7.98 |
| 2026-02-19 12:00 |
02:31:16.57 |
+58:39:38.6 |
HIP 11716 |
7.76 |
| 2026-02-20 00:00 |
02:31:17.64 |
+58:39:25.4 |
HIP 11716 |
7.55 |
| 2026-02-20 12:00 |
02:31:18.73 |
+58:39:12.2 |
HIP 11716 |
7.34 |
| 2026-02-21 00:00 |
02:31:19.84 |
+58:38:59.1 |
HIP 11716 |
7.14 |
| 2026-02-21 12:00 |
02:31:20.98 |
+58:38:46.2 |
HIP 11716 |
6.94 |
| 2026-02-22 00:00 |
02:31:22.14 |
+58:38:33.3 |
HIP 11716 |
6.75 |
| 2026-02-22 12:00 |
02:31:23.32 |
+58:38:20.5 |
HIP 11716 |
6.57 |
| 2026-02-23 00:00 |
02:31:24.53 |
+58:38:07.9 |
HIP 11716 |
6.40 |
| 2026-02-23 12:00 |
02:31:25.76 |
+58:37:55.3 |
HIP 11716 |
6.23 |
| 2026-02-24 00:00 |
02:31:27.01 |
+58:37:42.9 |
HIP 11716 |
6.08 |