メタデータ
| 項目 |
値 |
| Designation |
398P/Boattini |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-12-26T17:48:49.337280Z |
| Orbit solution date (soln_date, UTC) |
2025-09-10T22:25:49Z |
| Obs used |
1644 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
11.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-08-11T13:58:29.683200Z |
| Discovery magnitude (MPC) |
19.11 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2020-11-12.0000000 |
| e |
0.58256076 |
| q (au) |
1.305705 |
| a (au) |
3.127893 |
| i (deg) |
11.015212 |
| Ω (om, deg) |
127.464461 |
| ω (w, deg) |
320.231140 |
| M (ma, deg) |
352.028427 |
等級
散乱 + 全体線形
$$
M_a = (20.000 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.883 |
| k |
0.995 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
04:10:37.10 |
+15:00:38.8 |
HIP 19499 |
13.61 |
| 2026-06-01 12:00 |
04:12:20.54 |
+15:06:23.0 |
HIP 19617 |
10.59 |
| 2026-06-02 00:00 |
04:14:04.21 |
+15:12:04.3 |
HIP 19877 |
27.36 |
| 2026-06-02 12:00 |
04:15:48.10 |
+15:17:42.7 |
HIP 19877 |
6.35 |
| 2026-06-03 00:00 |
04:17:32.21 |
+15:23:18.1 |
HIP 19877 |
25.56 |
| 2026-06-03 12:00 |
04:19:16.54 |
+15:28:50.5 |
HIP 20205 |
11.55 |
| 2026-06-04 00:00 |
04:21:01.09 |
+15:34:20.0 |
HIP 20205 |
18.02 |
| 2026-06-04 12:00 |
04:22:45.85 |
+15:39:46.3 |
HIP 20485 |
11.22 |
| 2026-06-05 00:00 |
04:24:30.83 |
+15:45:09.6 |
HIP 20605 |
8.41 |
| 2026-06-05 12:00 |
04:26:16.02 |
+15:50:29.7 |
HIP 20661 |
11.07 |
| 2026-06-06 00:00 |
04:28:01.42 |
+15:55:46.7 |
HIP 20885 |
8.17 |
| 2026-06-06 12:00 |
04:29:47.03 |
+16:01:00.5 |
HIP 20916 |
14.22 |
| 2026-06-07 00:00 |
04:31:32.85 |
+16:06:11.0 |
HIP 21053 |
11.41 |
| 2026-06-07 12:00 |
04:33:18.87 |
+16:11:18.3 |
HIP 21257 |
9.32 |
| 2026-06-08 00:00 |
04:35:05.10 |
+16:16:22.3 |
HIP 21421 |
18.61 |
| 2026-06-08 12:00 |
04:36:51.52 |
+16:21:22.9 |
HIP 21421 |
16.34 |
| 2026-06-09 00:00 |
04:38:38.15 |
+16:26:20.1 |
HIP 21751 |
22.81 |
| 2026-06-09 12:00 |
04:40:24.97 |
+16:31:13.9 |
HIP 21762 |
0.42 |
| 2026-06-10 00:00 |
04:42:11.98 |
+16:36:04.3 |
HIP 21912 |
9.27 |
| 2026-06-10 12:00 |
04:43:59.19 |
+16:40:51.2 |
HIP 21912 |
20.61 |
| 2026-06-11 00:00 |
04:45:46.58 |
+16:45:34.5 |
HIP 22225 |
31.33 |
| 2026-06-11 12:00 |
04:47:34.16 |
+16:50:14.3 |
HIP 22347 |
20.15 |
| 2026-06-12 00:00 |
04:49:21.92 |
+16:54:50.6 |
HIP 22347 |
19.39 |
| 2026-06-12 12:00 |
04:51:09.87 |
+16:59:23.2 |
HIP 22496 |
16.85 |
| 2026-06-13 00:00 |
04:52:57.99 |
+17:03:52.1 |
HIP 22782 |
15.70 |
| 2026-06-13 12:00 |
04:54:46.28 |
+17:08:17.4 |
HIP 22782 |
12.31 |
| 2026-06-14 00:00 |
04:56:34.75 |
+17:12:39.0 |
HIP 23043 |
11.87 |
| 2026-06-14 12:00 |
04:58:23.38 |
+17:16:56.8 |
HIP 23049 |
12.86 |
| 2026-06-15 00:00 |
05:00:12.18 |
+17:21:10.8 |
HIP 23227 |
31.74 |
| 2026-06-15 12:00 |
05:02:01.14 |
+17:25:21.0 |
HIP 23504 |
19.01 |
| 2026-06-16 00:00 |
05:03:50.26 |
+17:29:27.4 |
HIP 23504 |
14.89 |
| 2026-06-16 12:00 |
05:05:39.54 |
+17:33:30.0 |
HIP 23707 |
10.80 |
| 2026-06-17 00:00 |
05:07:28.96 |
+17:37:28.6 |
HIP 23750 |
20.46 |
| 2026-06-17 12:00 |
05:09:18.54 |
+17:41:23.3 |
HIP 24000 |
13.67 |
| 2026-06-18 00:00 |
05:11:08.26 |
+17:45:14.1 |
HIP 24103 |
19.99 |
| 2026-06-18 12:00 |
05:12:58.12 |
+17:49:00.9 |
HIP 24251 |
16.68 |
| 2026-06-19 00:00 |
05:14:48.12 |
+17:52:43.7 |
HIP 24386 |
28.61 |
| 2026-06-19 12:00 |
05:16:38.25 |
+17:56:22.5 |
HIP 24612 |
30.03 |
| 2026-06-20 00:00 |
05:18:28.52 |
+17:59:57.2 |
HIP 24861 |
22.82 |
| 2026-06-20 12:00 |
05:20:18.91 |
+18:03:27.9 |
HIP 24861 |
18.33 |
| 2026-06-21 00:00 |
05:22:09.43 |
+18:06:54.4 |
HIP 25204 |
34.93 |
| 2026-06-21 12:00 |
05:24:00.07 |
+18:10:16.9 |
HIP 25204 |
26.69 |
| 2026-06-22 00:00 |
05:25:50.83 |
+18:13:35.2 |
HIP 25499 |
24.62 |