メタデータ
| 項目 |
値 |
| Designation |
513P/Broughton |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-06-16T07:21:38.180160Z |
| Orbit solution date (soln_date, UTC) |
2026-03-12T02:53:17Z |
| Obs used |
287 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
19.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2025-09-24T09:49:32.505600Z |
| Discovery magnitude (MPC) |
19.56 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-03-25.0000000 |
| e |
0.55079452 |
| q (au) |
3.276271 |
| a (au) |
7.293480 |
| i (deg) |
21.336906 |
| Ω (om, deg) |
57.023900 |
| ω (w, deg) |
304.483984 |
| M (ma, deg) |
246.147688 |
等級
散乱 + 全体線形
$$
M_a = (13.105 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.105 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.738 |
| 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) |
| 2026-05-12 00:00 |
03:48:40.79 |
+21:36:04.2 |
HIP 17837 |
16.18 |
| 2026-05-12 12:00 |
03:49:17.50 |
+21:39:11.4 |
HIP 17837 |
19.09 |
| 2026-05-13 00:00 |
03:49:54.22 |
+21:42:18.1 |
HIP 17837 |
25.13 |
| 2026-05-13 12:00 |
03:50:30.96 |
+21:45:24.2 |
HIP 18059 |
22.44 |
| 2026-05-14 00:00 |
03:51:07.70 |
+21:48:29.7 |
HIP 18059 |
14.98 |
| 2026-05-14 12:00 |
03:51:44.46 |
+21:51:34.7 |
HIP 18059 |
10.47 |
| 2026-05-15 00:00 |
03:52:21.22 |
+21:54:39.1 |
HIP 18059 |
12.62 |
| 2026-05-15 12:00 |
03:52:58.00 |
+21:57:43.0 |
HIP 18059 |
19.32 |
| 2026-05-16 00:00 |
03:53:34.78 |
+22:00:46.3 |
HIP 18059 |
27.41 |
| 2026-05-16 12:00 |
03:54:11.57 |
+22:03:49.0 |
HIP 18459 |
34.92 |
| 2026-05-17 00:00 |
03:54:48.37 |
+22:06:51.2 |
HIP 18459 |
27.46 |
| 2026-05-17 12:00 |
03:55:25.17 |
+22:09:52.8 |
HIP 18459 |
21.27 |
| 2026-05-18 00:00 |
03:56:01.98 |
+22:12:53.9 |
HIP 18459 |
17.74 |
| 2026-05-18 12:00 |
03:56:38.79 |
+22:15:54.4 |
HIP 18471 |
13.15 |
| 2026-05-19 00:00 |
03:57:15.60 |
+22:18:54.3 |
HIP 18471 |
11.20 |
| 2026-05-19 12:00 |
03:57:52.42 |
+22:21:53.7 |
HIP 18471 |
15.52 |
| 2026-05-20 00:00 |
03:58:29.24 |
+22:24:52.5 |
HIP 18471 |
22.78 |
| 2026-05-20 12:00 |
03:59:06.06 |
+22:27:50.7 |
HIP 18471 |
30.98 |
| 2026-05-21 00:00 |
03:59:42.89 |
+22:30:48.4 |
HIP 18625 |
29.52 |
| 2026-05-21 12:00 |
04:00:19.71 |
+22:33:45.5 |
HIP 18833 |
28.00 |
| 2026-05-22 00:00 |
04:00:56.53 |
+22:36:42.0 |
HIP 18833 |
21.45 |
| 2026-05-22 12:00 |
04:01:33.35 |
+22:39:38.0 |
HIP 18833 |
17.26 |
| 2026-05-23 00:00 |
04:02:10.17 |
+22:42:33.4 |
HIP 18833 |
17.25 |
| 2026-05-23 12:00 |
04:02:46.99 |
+22:45:28.2 |
HIP 18955 |
17.28 |
| 2026-05-24 00:00 |
04:03:23.81 |
+22:48:22.5 |
HIP 18955 |
9.52 |
| 2026-05-24 12:00 |
04:04:00.62 |
+22:51:16.2 |
HIP 18955 |
6.59 |
| 2026-05-25 00:00 |
04:04:37.42 |
+22:54:09.4 |
HIP 18955 |
12.52 |
| 2026-05-25 12:00 |
04:05:14.23 |
+22:57:01.9 |
HIP 19078 |
13.28 |
| 2026-05-26 00:00 |
04:05:51.02 |
+22:59:54.0 |
HIP 19078 |
11.96 |
| 2026-05-26 12:00 |
04:06:27.81 |
+23:02:45.4 |
HIP 19078 |
16.41 |
| 2026-05-27 00:00 |
04:07:04.60 |
+23:05:36.3 |
HIP 19078 |
23.56 |
| 2026-05-27 12:00 |
04:07:41.38 |
+23:08:26.7 |
HIP 19363 |
16.77 |
| 2026-05-28 00:00 |
04:08:18.15 |
+23:11:16.5 |
HIP 19363 |
9.73 |
| 2026-05-28 12:00 |
04:08:54.91 |
+23:14:05.7 |
HIP 19363 |
8.18 |
| 2026-05-29 00:00 |
04:09:31.66 |
+23:16:54.4 |
HIP 19417 |
0.96 |
| 2026-05-29 12:00 |
04:10:08.41 |
+23:19:42.5 |
HIP 19417 |
9.26 |
| 2026-05-30 00:00 |
04:10:45.15 |
+23:22:30.1 |
HIP 19417 |
18.12 |
| 2026-05-30 12:00 |
04:11:21.87 |
+23:25:17.1 |
HIP 19591 |
15.11 |
| 2026-05-31 00:00 |
04:11:58.59 |
+23:28:03.5 |
HIP 19634 |
8.83 |
| 2026-05-31 12:00 |
04:12:35.29 |
+23:30:49.4 |
HIP 19662 |
2.66 |
| 2026-06-01 00:00 |
04:13:11.99 |
+23:33:34.8 |
HIP 19662 |
6.24 |
| 2026-06-01 12:00 |
04:13:48.67 |
+23:36:19.6 |
HIP 19793 |
10.15 |
| 2026-06-02 00:00 |
04:14:25.34 |
+23:39:03.8 |
HIP 19785 |
2.74 |