メタデータ
| 項目 |
値 |
| Designation |
424P/La Sagra |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-08-16T14:00:44.933760Z |
| Orbit solution date (soln_date, UTC) |
2022-02-14T01:12:55Z |
| Obs used |
614 |
| NEO |
- |
| M1 |
17.800 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-06-06T12:36:39.744000Z |
| Discovery magnitude (MPC) |
20.60 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-05-02.0000000 |
| e |
0.69277912 |
| q (au) |
1.351983 |
| a (au) |
4.400689 |
| i (deg) |
8.637783 |
| Ω (om, deg) |
51.619990 |
| ω (w, deg) |
312.445906 |
| M (ma, deg) |
144.602315 |
等級
散乱 + 全体線形
$$
M_a = (17.866 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.866 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.862 |
| k |
0.990 |
| 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) |
| 2026-05-12 00:00 |
11:58:48.60 |
+07:52:23.6 |
HIP 58372 |
21.89 |
| 2026-05-12 12:00 |
11:58:41.69 |
+07:52:35.5 |
HIP 58372 |
21.37 |
| 2026-05-13 00:00 |
11:58:34.89 |
+07:52:46.6 |
HIP 58372 |
20.97 |
| 2026-05-13 12:00 |
11:58:28.21 |
+07:52:56.8 |
HIP 58372 |
20.70 |
| 2026-05-14 00:00 |
11:58:21.66 |
+07:53:06.2 |
HIP 58372 |
20.55 |
| 2026-05-14 12:00 |
11:58:15.22 |
+07:53:14.6 |
HIP 58372 |
20.51 |
| 2026-05-15 00:00 |
11:58:08.90 |
+07:53:22.1 |
HIP 58372 |
20.59 |
| 2026-05-15 12:00 |
11:58:02.71 |
+07:53:28.8 |
HIP 58372 |
20.76 |
| 2026-05-16 00:00 |
11:57:56.64 |
+07:53:34.5 |
HIP 58372 |
21.03 |
| 2026-05-16 12:00 |
11:57:50.69 |
+07:53:39.4 |
HIP 58372 |
21.38 |
| 2026-05-17 00:00 |
11:57:44.86 |
+07:53:43.4 |
HIP 58372 |
21.81 |
| 2026-05-17 12:00 |
11:57:39.16 |
+07:53:46.5 |
HIP 58372 |
22.29 |
| 2026-05-18 00:00 |
11:57:33.58 |
+07:53:48.7 |
HIP 58372 |
22.83 |
| 2026-05-18 12:00 |
11:57:28.13 |
+07:53:50.1 |
HIP 58372 |
23.40 |
| 2026-05-19 00:00 |
11:57:22.80 |
+07:53:50.5 |
HIP 58372 |
24.02 |
| 2026-05-19 12:00 |
11:57:17.59 |
+07:53:50.1 |
HIP 58372 |
24.66 |
| 2026-05-20 00:00 |
11:57:12.51 |
+07:53:48.8 |
HIP 58372 |
25.32 |
| 2026-05-20 12:00 |
11:57:07.55 |
+07:53:46.7 |
HIP 58372 |
25.99 |
| 2026-05-21 00:00 |
11:57:02.72 |
+07:53:43.6 |
HIP 58372 |
26.67 |
| 2026-05-21 12:00 |
11:56:58.01 |
+07:53:39.7 |
HIP 58372 |
27.36 |
| 2026-05-22 00:00 |
11:56:53.43 |
+07:53:34.9 |
HIP 58372 |
28.05 |
| 2026-05-22 12:00 |
11:56:48.98 |
+07:53:29.3 |
HIP 58372 |
28.73 |
| 2026-05-23 00:00 |
11:56:44.65 |
+07:53:22.7 |
HIP 58372 |
29.41 |
| 2026-05-23 12:00 |
11:56:40.45 |
+07:53:15.4 |
HIP 58372 |
30.08 |
| 2026-05-24 00:00 |
11:56:36.37 |
+07:53:07.1 |
HIP 58372 |
30.74 |
| 2026-05-24 12:00 |
11:56:32.42 |
+07:52:58.1 |
HIP 58372 |
31.38 |
| 2026-05-25 00:00 |
11:56:28.59 |
+07:52:48.1 |
HIP 58372 |
32.01 |
| 2026-05-25 12:00 |
11:56:24.89 |
+07:52:37.3 |
HIP 58372 |
32.62 |
| 2026-05-26 00:00 |
11:56:21.32 |
+07:52:25.7 |
HIP 58372 |
33.21 |
| 2026-05-26 12:00 |
11:56:17.87 |
+07:52:13.2 |
HIP 58372 |
33.78 |
| 2026-05-27 00:00 |
11:56:14.55 |
+07:52:00.0 |
HIP 58372 |
34.33 |
| 2026-05-27 12:00 |
11:56:11.35 |
+07:51:45.8 |
HIP 58372 |
34.86 |
| 2026-05-28 00:00 |
11:56:08.28 |
+07:51:30.8 |
HIP 58372 |
35.37 |
| 2026-05-28 12:00 |
11:56:05.34 |
+07:51:15.0 |
HIP 58372 |
35.86 |
| 2026-05-29 00:00 |
11:56:02.52 |
+07:50:58.3 |
HIP 58372 |
36.32 |
| 2026-05-29 12:00 |
11:55:59.82 |
+07:50:40.9 |
HIP 58372 |
36.75 |
| 2026-05-30 00:00 |
11:55:57.26 |
+07:50:22.6 |
HIP 58372 |
37.16 |
| 2026-05-30 12:00 |
11:55:54.82 |
+07:50:03.5 |
HIP 58372 |
37.55 |
| 2026-05-31 00:00 |
11:55:52.50 |
+07:49:43.5 |
HIP 58372 |
37.91 |
| 2026-05-31 12:00 |
11:55:50.31 |
+07:49:22.8 |
HIP 58372 |
38.25 |
| 2026-06-01 00:00 |
11:55:48.24 |
+07:49:01.2 |
HIP 58372 |
38.56 |
| 2026-06-01 12:00 |
11:55:46.30 |
+07:48:38.9 |
HIP 58372 |
38.84 |
| 2026-06-02 00:00 |
11:55:44.49 |
+07:48:15.7 |
HIP 58372 |
39.10 |