メタデータ
| 項目 |
値 |
| Designation |
C/1977 D1 (Lovas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1976-11-01T07:57:55.978560Z |
| Orbit solution date (soln_date, UTC) |
2023-08-28T01:42:37Z |
| Obs used |
30 |
| NEO |
- |
| M1 |
5.000 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1977-05-05.0000000 |
| e |
1.00340358 |
| q (au) |
5.715993 |
| a (au) |
-1679.405282 |
| i (deg) |
64.522285 |
| Ω (om, deg) |
338.172768 |
| ω (w, deg) |
146.312104 |
| M (ma, deg) |
0.002645 |
等級
散乱 + 全体線形
$$
M_a = (13.384 + 2.544\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.384 |
| n |
2.544 |
| gf |
0.999 |
| gb |
-0.900 |
| k |
0.800 |
| 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 |
22:01:09.76 |
-74:56:53.9 |
HIP 108777 |
27.23 |
| 2026-06-01 12:00 |
22:01:08.58 |
-74:57:15.3 |
HIP 108777 |
27.60 |
| 2026-06-02 00:00 |
22:01:07.34 |
-74:57:36.6 |
HIP 108777 |
27.96 |
| 2026-06-02 12:00 |
22:01:06.06 |
-74:57:57.9 |
HIP 108777 |
28.32 |
| 2026-06-03 00:00 |
22:01:04.72 |
-74:58:19.2 |
HIP 108777 |
28.69 |
| 2026-06-03 12:00 |
22:01:03.34 |
-74:58:40.5 |
HIP 108777 |
29.05 |
| 2026-06-04 00:00 |
22:01:01.90 |
-74:59:01.8 |
HIP 108777 |
29.42 |
| 2026-06-04 12:00 |
22:01:00.41 |
-74:59:23.1 |
HIP 108777 |
29.78 |
| 2026-06-05 00:00 |
22:00:58.88 |
-74:59:44.3 |
HIP 108777 |
30.15 |
| 2026-06-05 12:00 |
22:00:57.29 |
-75:00:05.5 |
HIP 108777 |
30.51 |
| 2026-06-06 00:00 |
22:00:55.65 |
-75:00:26.7 |
HIP 108777 |
30.88 |
| 2026-06-06 12:00 |
22:00:53.96 |
-75:00:47.9 |
HIP 108777 |
31.24 |
| 2026-06-07 00:00 |
22:00:52.23 |
-75:01:09.1 |
HIP 108777 |
31.61 |
| 2026-06-07 12:00 |
22:00:50.44 |
-75:01:30.2 |
HIP 108777 |
31.97 |
| 2026-06-08 00:00 |
22:00:48.60 |
-75:01:51.3 |
HIP 108777 |
32.34 |
| 2026-06-08 12:00 |
22:00:46.71 |
-75:02:12.4 |
HIP 108777 |
32.71 |
| 2026-06-09 00:00 |
22:00:44.78 |
-75:02:33.5 |
HIP 108777 |
33.07 |
| 2026-06-09 12:00 |
22:00:42.79 |
-75:02:54.5 |
HIP 108777 |
33.44 |
| 2026-06-10 00:00 |
22:00:40.75 |
-75:03:15.5 |
HIP 108777 |
33.81 |
| 2026-06-10 12:00 |
22:00:38.66 |
-75:03:36.4 |
HIP 108777 |
34.17 |
| 2026-06-11 00:00 |
22:00:36.53 |
-75:03:57.4 |
HIP 108777 |
34.54 |
| 2026-06-11 12:00 |
22:00:34.34 |
-75:04:18.2 |
HIP 108777 |
34.91 |
| 2026-06-12 00:00 |
22:00:32.10 |
-75:04:39.1 |
HIP 108777 |
35.28 |
| 2026-06-12 12:00 |
22:00:29.82 |
-75:04:59.9 |
HIP 108777 |
35.64 |
| 2026-06-13 00:00 |
22:00:27.48 |
-75:05:20.6 |
HIP 108779 |
35.95 |
| 2026-06-13 12:00 |
22:00:25.10 |
-75:05:41.3 |
HIP 108779 |
35.64 |
| 2026-06-14 00:00 |
22:00:22.66 |
-75:06:02.0 |
HIP 108779 |
35.33 |
| 2026-06-14 12:00 |
22:00:20.18 |
-75:06:22.6 |
HIP 108779 |
35.02 |
| 2026-06-15 00:00 |
22:00:17.65 |
-75:06:43.2 |
HIP 108779 |
34.72 |
| 2026-06-15 12:00 |
22:00:15.07 |
-75:07:03.7 |
HIP 108779 |
34.41 |
| 2026-06-16 00:00 |
22:00:12.44 |
-75:07:24.1 |
HIP 108779 |
34.11 |
| 2026-06-16 12:00 |
22:00:09.77 |
-75:07:44.5 |
HIP 108779 |
33.82 |
| 2026-06-17 00:00 |
22:00:07.04 |
-75:08:04.9 |
HIP 108779 |
33.53 |
| 2026-06-17 12:00 |
22:00:04.27 |
-75:08:25.1 |
HIP 108779 |
33.24 |
| 2026-06-18 00:00 |
22:00:01.45 |
-75:08:45.4 |
HIP 108779 |
32.95 |
| 2026-06-18 12:00 |
21:59:58.59 |
-75:09:05.5 |
HIP 108779 |
32.67 |
| 2026-06-19 00:00 |
21:59:55.67 |
-75:09:25.6 |
HIP 108779 |
32.39 |
| 2026-06-19 12:00 |
21:59:52.71 |
-75:09:45.6 |
HIP 108779 |
32.12 |
| 2026-06-20 00:00 |
21:59:49.70 |
-75:10:05.6 |
HIP 108779 |
31.85 |
| 2026-06-20 12:00 |
21:59:46.65 |
-75:10:25.4 |
HIP 108779 |
31.58 |
| 2026-06-21 00:00 |
21:59:43.54 |
-75:10:45.2 |
HIP 108779 |
31.32 |
| 2026-06-21 12:00 |
21:59:40.40 |
-75:11:05.0 |
HIP 108779 |
31.06 |
| 2026-06-22 00:00 |
21:59:37.20 |
-75:11:24.6 |
HIP 108779 |
30.81 |