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) |
| 2026-07-29 00:00 |
12:04:43.14 |
+05:51:40.7 |
HIP 58809 |
23.32 |
| 2026-07-29 12:00 |
12:04:53.39 |
+05:50:10.3 |
HIP 58809 |
23.92 |
| 2026-07-30 00:00 |
12:05:03.72 |
+05:48:39.4 |
HIP 58809 |
24.87 |
| 2026-07-30 12:00 |
12:05:14.12 |
+05:47:08.3 |
HIP 59080 |
25.46 |
| 2026-07-31 00:00 |
12:05:24.59 |
+05:45:36.8 |
HIP 59080 |
22.98 |
| 2026-07-31 12:00 |
12:05:35.14 |
+05:44:05.0 |
HIP 59080 |
20.63 |
| 2026-08-01 00:00 |
12:05:45.76 |
+05:42:32.8 |
HIP 59080 |
18.46 |
| 2026-08-01 12:00 |
12:05:56.45 |
+05:41:00.3 |
HIP 59080 |
16.57 |
| 2026-08-02 00:00 |
12:06:07.22 |
+05:39:27.5 |
HIP 59080 |
15.05 |
| 2026-08-02 12:00 |
12:06:18.06 |
+05:37:54.4 |
HIP 59080 |
14.06 |
| 2026-08-03 00:00 |
12:06:28.96 |
+05:36:20.9 |
HIP 59080 |
13.71 |
| 2026-08-03 12:00 |
12:06:39.94 |
+05:34:47.1 |
HIP 59080 |
14.06 |
| 2026-08-04 00:00 |
12:06:50.99 |
+05:33:13.1 |
HIP 59080 |
15.08 |
| 2026-08-04 12:00 |
12:07:02.11 |
+05:31:38.7 |
HIP 59063 |
14.28 |
| 2026-08-05 00:00 |
12:07:13.29 |
+05:30:04.0 |
HIP 59063 |
13.92 |
| 2026-08-05 12:00 |
12:07:24.55 |
+05:28:29.0 |
HIP 59063 |
14.29 |
| 2026-08-06 00:00 |
12:07:35.87 |
+05:26:53.7 |
HIP 59063 |
15.35 |
| 2026-08-06 12:00 |
12:07:47.26 |
+05:25:18.2 |
HIP 59063 |
16.98 |
| 2026-08-07 00:00 |
12:07:58.72 |
+05:23:42.3 |
HIP 59063 |
19.05 |
| 2026-08-07 12:00 |
12:08:10.24 |
+05:22:06.2 |
HIP 59063 |
21.43 |
| 2026-08-08 00:00 |
12:08:21.83 |
+05:20:29.7 |
HIP 59063 |
24.05 |
| 2026-08-08 12:00 |
12:08:33.49 |
+05:18:53.0 |
HIP 59301 |
22.83 |
| 2026-08-09 00:00 |
12:08:45.20 |
+05:17:16.1 |
HIP 59301 |
20.87 |
| 2026-08-09 12:00 |
12:08:56.99 |
+05:15:38.8 |
HIP 59301 |
19.29 |
| 2026-08-10 00:00 |
12:09:08.84 |
+05:14:01.3 |
HIP 59301 |
18.18 |
| 2026-08-10 12:00 |
12:09:20.75 |
+05:12:23.5 |
HIP 59301 |
17.65 |
| 2026-08-11 00:00 |
12:09:32.72 |
+05:10:45.5 |
HIP 59301 |
17.75 |
| 2026-08-11 12:00 |
12:09:44.75 |
+05:09:07.2 |
HIP 59301 |
18.50 |
| 2026-08-12 00:00 |
12:09:56.85 |
+05:07:28.7 |
HIP 59301 |
19.81 |
| 2026-08-12 12:00 |
12:10:09.01 |
+05:05:49.9 |
HIP 59301 |
21.60 |
| 2026-08-13 00:00 |
12:10:21.22 |
+05:04:10.9 |
HIP 59301 |
23.77 |
| 2026-08-13 12:00 |
12:10:33.50 |
+05:02:31.6 |
HIP 59301 |
26.22 |
| 2026-08-14 00:00 |
12:10:45.84 |
+05:00:52.2 |
HIP 59479 |
26.69 |
| 2026-08-14 12:00 |
12:10:58.23 |
+04:59:12.5 |
HIP 59479 |
26.04 |
| 2026-08-15 00:00 |
12:11:10.68 |
+04:57:32.5 |
HIP 59479 |
25.85 |
| 2026-08-15 12:00 |
12:11:23.19 |
+04:55:52.4 |
HIP 59479 |
26.13 |
| 2026-08-16 00:00 |
12:11:35.75 |
+04:54:12.1 |
HIP 59479 |
26.88 |
| 2026-08-16 12:00 |
12:11:48.37 |
+04:52:31.5 |
HIP 59479 |
28.07 |
| 2026-08-17 00:00 |
12:12:01.05 |
+04:50:50.7 |
HIP 59479 |
29.64 |
| 2026-08-17 12:00 |
12:12:13.78 |
+04:49:09.8 |
HIP 59655 |
29.36 |
| 2026-08-18 00:00 |
12:12:26.56 |
+04:47:28.6 |
HIP 59655 |
27.13 |
| 2026-08-18 12:00 |
12:12:39.40 |
+04:45:47.3 |
HIP 59655 |
25.22 |
| 2026-08-19 00:00 |
12:12:52.29 |
+04:44:05.7 |
HIP 59655 |
23.70 |