413P/Larson
メタデータ
| 項目 |
値 |
| Designation |
413P/Larson |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-07-19T07:08:45.504960Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:49Z |
| Obs used |
818 |
| NEO |
- |
| M1 |
14.000 |
| K1 |
9.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-11-25T04:11:40.128000Z |
| Discovery magnitude (MPC) |
20.50 T |
| Discovery observatory (MPC) |
Z84 · Calar Alto-Schmidt |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-01-12.0000000 |
| e |
0.42384746 |
| q (au) |
2.139804 |
| a (au) |
3.713954 |
| i (deg) |
15.984004 |
| Ω (om, deg) |
39.063272 |
| ω (w, deg) |
185.901501 |
| M (ma, deg) |
183.145966 |
等級
散乱 + 全体線形
$$
M_a = (15.069 + 3.557\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.069 |
| n |
3.557 |
| gf |
1.000 |
| gb |
-0.559 |
| 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) |
| 2026-02-03 00:00 |
03:24:40.92 |
+27:00:47.1 |
HIP 15760 |
22.42 |
| 2026-02-03 12:00 |
03:24:43.96 |
+27:00:40.3 |
HIP 15760 |
23.04 |
| 2026-02-04 00:00 |
03:24:47.22 |
+27:00:34.2 |
HIP 15760 |
23.71 |
| 2026-02-04 12:00 |
03:24:50.70 |
+27:00:28.8 |
HIP 15760 |
24.43 |
| 2026-02-05 00:00 |
03:24:54.41 |
+27:00:24.2 |
HIP 15760 |
25.21 |
| 2026-02-05 12:00 |
03:24:58.33 |
+27:00:20.3 |
HIP 15760 |
26.04 |
| 2026-02-06 00:00 |
03:25:02.48 |
+27:00:17.1 |
HIP 15760 |
26.93 |
| 2026-02-06 12:00 |
03:25:06.85 |
+27:00:14.7 |
HIP 15760 |
27.87 |
| 2026-02-07 00:00 |
03:25:11.44 |
+27:00:13.0 |
HIP 15760 |
28.86 |
| 2026-02-07 12:00 |
03:25:16.25 |
+27:00:12.0 |
HIP 15760 |
29.90 |
| 2026-02-08 00:00 |
03:25:21.28 |
+27:00:11.8 |
HIP 15760 |
31.00 |
| 2026-02-08 12:00 |
03:25:26.52 |
+27:00:12.3 |
HIP 15760 |
32.15 |
| 2026-02-09 00:00 |
03:25:31.99 |
+27:00:13.6 |
HIP 16090 |
32.32 |
| 2026-02-09 12:00 |
03:25:37.66 |
+27:00:15.6 |
HIP 16090 |
31.41 |
| 2026-02-10 00:00 |
03:25:43.56 |
+27:00:18.3 |
HIP 16090 |
30.50 |
| 2026-02-10 12:00 |
03:25:49.67 |
+27:00:21.8 |
HIP 16090 |
29.57 |
| 2026-02-11 00:00 |
03:25:55.99 |
+27:00:26.0 |
HIP 16090 |
28.64 |
| 2026-02-11 12:00 |
03:26:02.53 |
+27:00:30.9 |
HIP 16090 |
27.71 |
| 2026-02-12 00:00 |
03:26:09.28 |
+27:00:36.6 |
HIP 16090 |
26.79 |
| 2026-02-12 12:00 |
03:26:16.24 |
+27:00:43.1 |
HIP 16090 |
25.90 |
| 2026-02-13 00:00 |
03:26:23.41 |
+27:00:50.2 |
HIP 16090 |
25.03 |
| 2026-02-13 12:00 |
03:26:30.79 |
+27:00:58.1 |
HIP 16090 |
24.21 |
| 2026-02-14 00:00 |
03:26:38.38 |
+27:01:06.7 |
HIP 16090 |
23.45 |
| 2026-02-14 12:00 |
03:26:46.18 |
+27:01:16.1 |
HIP 16090 |
22.77 |
| 2026-02-15 00:00 |
03:26:54.18 |
+27:01:26.2 |
HIP 16090 |
22.18 |
| 2026-02-15 12:00 |
03:27:02.40 |
+27:01:37.0 |
HIP 16090 |
21.70 |
| 2026-02-16 00:00 |
03:27:10.81 |
+27:01:48.5 |
HIP 16090 |
21.36 |
| 2026-02-16 12:00 |
03:27:19.44 |
+27:02:00.8 |
HIP 16090 |
21.17 |
| 2026-02-17 00:00 |
03:27:28.26 |
+27:02:13.8 |
HIP 16090 |
21.15 |
| 2026-02-17 12:00 |
03:27:37.29 |
+27:02:27.5 |
HIP 16090 |
21.31 |
| 2026-02-18 00:00 |
03:27:46.53 |
+27:02:41.9 |
HIP 16090 |
21.66 |
| 2026-02-18 12:00 |
03:27:55.96 |
+27:02:57.0 |
HIP 16090 |
22.21 |
| 2026-02-19 00:00 |
03:28:05.59 |
+27:03:12.9 |
HIP 16090 |
22.96 |
| 2026-02-19 12:00 |
03:28:15.42 |
+27:03:29.5 |
HIP 16090 |
23.89 |
| 2026-02-20 00:00 |
03:28:25.45 |
+27:03:46.7 |
HIP 16090 |
25.00 |
| 2026-02-20 12:00 |
03:28:35.68 |
+27:04:04.7 |
HIP 16090 |
26.27 |
| 2026-02-21 00:00 |
03:28:46.10 |
+27:04:23.4 |
HIP 16090 |
27.70 |
| 2026-02-21 12:00 |
03:28:56.71 |
+27:04:42.8 |
HIP 16382 |
27.90 |
| 2026-02-22 00:00 |
03:29:07.52 |
+27:05:02.8 |
HIP 16382 |
25.48 |
| 2026-02-22 12:00 |
03:29:18.53 |
+27:05:23.6 |
HIP 16382 |
23.01 |
| 2026-02-23 00:00 |
03:29:29.72 |
+27:05:45.1 |
HIP 16382 |
20.51 |
| 2026-02-23 12:00 |
03:29:41.10 |
+27:06:07.2 |
HIP 16382 |
17.96 |
| 2026-02-24 00:00 |
03:29:52.67 |
+27:06:30.0 |
HIP 16382 |
15.37 |