メタデータ
| 項目 |
値 |
| Designation |
C/1976 U1 (Lovas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1976-07-06T14:19:56.015040Z |
| Orbit solution date (soln_date, UTC) |
2023-08-28T01:42:39Z |
| Obs used |
34 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
9.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1977-02-05.0000000 |
| e |
1.00366837 |
| q (au) |
5.857482 |
| a (au) |
-1596.751644 |
| i (deg) |
86.628655 |
| Ω (om, deg) |
286.041394 |
| ω (w, deg) |
118.810853 |
| M (ma, deg) |
0.003296 |
等級
散乱 + 全体線形
$$
M_a = (5.909 + 3.387\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.909 |
| n |
3.387 |
| gf |
0.994 |
| gb |
-0.998 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
06:31:45.49 |
-62:50:18.7 |
HIP 30981 |
23.89 |
| 2026-03-26 12:00 |
06:31:45.29 |
-62:49:54.7 |
HIP 30981 |
24.23 |
| 2026-03-27 00:00 |
06:31:45.11 |
-62:49:30.8 |
HIP 30981 |
24.58 |
| 2026-03-27 12:00 |
06:31:44.96 |
-62:49:06.8 |
HIP 30981 |
24.93 |
| 2026-03-28 00:00 |
06:31:44.85 |
-62:48:42.9 |
HIP 30981 |
25.29 |
| 2026-03-28 12:00 |
06:31:44.77 |
-62:48:18.9 |
HIP 31381 |
25.39 |
| 2026-03-29 00:00 |
06:31:44.72 |
-62:47:55.0 |
HIP 31381 |
25.17 |
| 2026-03-29 12:00 |
06:31:44.70 |
-62:47:31.1 |
HIP 31381 |
24.95 |
| 2026-03-30 00:00 |
06:31:44.71 |
-62:47:07.1 |
HIP 31381 |
24.73 |
| 2026-03-30 12:00 |
06:31:44.76 |
-62:46:43.2 |
HIP 31381 |
24.52 |
| 2026-03-31 00:00 |
06:31:44.83 |
-62:46:19.3 |
HIP 31381 |
24.30 |
| 2026-03-31 12:00 |
06:31:44.94 |
-62:45:55.4 |
HIP 31381 |
24.09 |
| 2026-04-01 00:00 |
06:31:45.08 |
-62:45:31.5 |
HIP 31381 |
23.88 |
| 2026-04-01 12:00 |
06:31:45.25 |
-62:45:07.7 |
HIP 31381 |
23.67 |
| 2026-04-02 00:00 |
06:31:45.45 |
-62:44:43.8 |
HIP 31381 |
23.46 |
| 2026-04-02 12:00 |
06:31:45.68 |
-62:44:20.0 |
HIP 31381 |
23.26 |
| 2026-04-03 00:00 |
06:31:45.94 |
-62:43:56.2 |
HIP 31381 |
23.05 |
| 2026-04-03 12:00 |
06:31:46.24 |
-62:43:32.4 |
HIP 31381 |
22.85 |
| 2026-04-04 00:00 |
06:31:46.56 |
-62:43:08.7 |
HIP 31381 |
22.65 |
| 2026-04-04 12:00 |
06:31:46.92 |
-62:42:44.9 |
HIP 31381 |
22.45 |
| 2026-04-05 00:00 |
06:31:47.30 |
-62:42:21.2 |
HIP 31381 |
22.26 |
| 2026-04-05 12:00 |
06:31:47.72 |
-62:41:57.6 |
HIP 31381 |
22.07 |
| 2026-04-06 00:00 |
06:31:48.17 |
-62:41:33.9 |
HIP 31381 |
21.88 |
| 2026-04-06 12:00 |
06:31:48.65 |
-62:41:10.3 |
HIP 31381 |
21.69 |
| 2026-04-07 00:00 |
06:31:49.16 |
-62:40:46.7 |
HIP 31381 |
21.51 |
| 2026-04-07 12:00 |
06:31:49.70 |
-62:40:23.2 |
HIP 31381 |
21.32 |
| 2026-04-08 00:00 |
06:31:50.27 |
-62:39:59.7 |
HIP 31381 |
21.14 |
| 2026-04-08 12:00 |
06:31:50.87 |
-62:39:36.2 |
HIP 31381 |
20.97 |
| 2026-04-09 00:00 |
06:31:51.50 |
-62:39:12.8 |
HIP 31381 |
20.79 |
| 2026-04-09 12:00 |
06:31:52.16 |
-62:38:49.4 |
HIP 31381 |
20.62 |
| 2026-04-10 00:00 |
06:31:52.85 |
-62:38:26.1 |
HIP 31381 |
20.45 |
| 2026-04-10 12:00 |
06:31:53.58 |
-62:38:02.8 |
HIP 31381 |
20.29 |
| 2026-04-11 00:00 |
06:31:54.33 |
-62:37:39.6 |
HIP 31381 |
20.13 |
| 2026-04-11 12:00 |
06:31:55.11 |
-62:37:16.4 |
HIP 31381 |
19.97 |
| 2026-04-12 00:00 |
06:31:55.92 |
-62:36:53.3 |
HIP 31381 |
19.81 |
| 2026-04-12 12:00 |
06:31:56.76 |
-62:36:30.2 |
HIP 31381 |
19.66 |
| 2026-04-13 00:00 |
06:31:57.64 |
-62:36:07.2 |
HIP 31381 |
19.51 |
| 2026-04-13 12:00 |
06:31:58.54 |
-62:35:44.2 |
HIP 31381 |
19.37 |
| 2026-04-14 00:00 |
06:31:59.47 |
-62:35:21.3 |
HIP 31381 |
19.23 |
| 2026-04-14 12:00 |
06:32:00.43 |
-62:34:58.5 |
HIP 31381 |
19.09 |
| 2026-04-15 00:00 |
06:32:01.42 |
-62:34:35.7 |
HIP 31381 |
18.96 |
| 2026-04-15 12:00 |
06:32:02.44 |
-62:34:13.0 |
HIP 31381 |
18.83 |
| 2026-04-16 00:00 |
06:32:03.49 |
-62:33:50.4 |
HIP 31381 |
18.70 |