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) |
| 2026-06-01 00:00 |
02:39:30.60 |
+58:38:55.3 |
HIP 12369 |
11.90 |
| 2026-06-01 12:00 |
02:39:33.19 |
+58:39:08.0 |
HIP 12369 |
11.76 |
| 2026-06-02 00:00 |
02:39:35.77 |
+58:39:20.8 |
HIP 12369 |
11.63 |
| 2026-06-02 12:00 |
02:39:38.33 |
+58:39:33.7 |
HIP 12369 |
11.51 |
| 2026-06-03 00:00 |
02:39:40.89 |
+58:39:46.7 |
HIP 12369 |
11.40 |
| 2026-06-03 12:00 |
02:39:43.43 |
+58:39:59.8 |
HIP 12369 |
11.31 |
| 2026-06-04 00:00 |
02:39:45.96 |
+58:40:13.0 |
HIP 12369 |
11.22 |
| 2026-06-04 12:00 |
02:39:48.48 |
+58:40:26.3 |
HIP 12369 |
11.15 |
| 2026-06-05 00:00 |
02:39:50.99 |
+58:40:39.7 |
HIP 12369 |
11.09 |
| 2026-06-05 12:00 |
02:39:53.48 |
+58:40:53.1 |
HIP 12369 |
11.04 |
| 2026-06-06 00:00 |
02:39:55.97 |
+58:41:06.7 |
HIP 12369 |
11.00 |
| 2026-06-06 12:00 |
02:39:58.44 |
+58:41:20.3 |
HIP 12369 |
10.97 |
| 2026-06-07 00:00 |
02:40:00.90 |
+58:41:34.0 |
HIP 12369 |
10.95 |
| 2026-06-07 12:00 |
02:40:03.34 |
+58:41:47.8 |
HIP 12369 |
10.95 |
| 2026-06-08 00:00 |
02:40:05.78 |
+58:42:01.7 |
HIP 12369 |
10.96 |
| 2026-06-08 12:00 |
02:40:08.20 |
+58:42:15.7 |
HIP 12369 |
10.98 |
| 2026-06-09 00:00 |
02:40:10.60 |
+58:42:29.8 |
HIP 12369 |
11.01 |
| 2026-06-09 12:00 |
02:40:13.00 |
+58:42:43.9 |
HIP 12369 |
11.05 |
| 2026-06-10 00:00 |
02:40:15.38 |
+58:42:58.2 |
HIP 12369 |
11.11 |
| 2026-06-10 12:00 |
02:40:17.74 |
+58:43:12.5 |
HIP 12369 |
11.17 |
| 2026-06-11 00:00 |
02:40:20.09 |
+58:43:26.9 |
HIP 12369 |
11.25 |
| 2026-06-11 12:00 |
02:40:22.43 |
+58:43:41.4 |
HIP 12369 |
11.34 |
| 2026-06-12 00:00 |
02:40:24.76 |
+58:43:55.9 |
HIP 12369 |
11.43 |
| 2026-06-12 12:00 |
02:40:27.07 |
+58:44:10.5 |
HIP 12369 |
11.54 |
| 2026-06-13 00:00 |
02:40:29.36 |
+58:44:25.2 |
HIP 12369 |
11.66 |
| 2026-06-13 12:00 |
02:40:31.64 |
+58:44:40.0 |
HIP 12369 |
11.78 |
| 2026-06-14 00:00 |
02:40:33.91 |
+58:44:54.9 |
HIP 12369 |
11.91 |
| 2026-06-14 12:00 |
02:40:36.16 |
+58:45:09.8 |
HIP 12369 |
12.06 |
| 2026-06-15 00:00 |
02:40:38.40 |
+58:45:24.8 |
HIP 12369 |
12.21 |
| 2026-06-15 12:00 |
02:40:40.62 |
+58:45:39.9 |
HIP 12369 |
12.36 |
| 2026-06-16 00:00 |
02:40:42.82 |
+58:45:55.1 |
HIP 12369 |
12.53 |
| 2026-06-16 12:00 |
02:40:45.01 |
+58:46:10.3 |
HIP 12369 |
12.70 |
| 2026-06-17 00:00 |
02:40:47.18 |
+58:46:25.6 |
HIP 12369 |
12.88 |
| 2026-06-17 12:00 |
02:40:49.34 |
+58:46:40.9 |
HIP 12369 |
13.07 |
| 2026-06-18 00:00 |
02:40:51.48 |
+58:46:56.3 |
HIP 12369 |
13.26 |
| 2026-06-18 12:00 |
02:40:53.60 |
+58:47:11.8 |
HIP 12572 |
12.97 |
| 2026-06-19 00:00 |
02:40:55.71 |
+58:47:27.4 |
HIP 12572 |
12.62 |
| 2026-06-19 12:00 |
02:40:57.80 |
+58:47:43.0 |
HIP 12572 |
12.26 |
| 2026-06-20 00:00 |
02:40:59.88 |
+58:47:58.7 |
HIP 12572 |
11.91 |
| 2026-06-20 12:00 |
02:41:01.94 |
+58:48:14.4 |
HIP 12572 |
11.56 |
| 2026-06-21 00:00 |
02:41:03.98 |
+58:48:30.2 |
HIP 12572 |
11.20 |
| 2026-06-21 12:00 |
02:41:06.00 |
+58:48:46.1 |
HIP 12572 |
10.85 |
| 2026-06-22 00:00 |
02:41:08.01 |
+58:49:02.0 |
HIP 12572 |
10.51 |