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) |
| 2026-05-12 00:00 |
03:04:54.59 |
+10:38:53.5 |
HIP 14360 |
21.15 |
| 2026-05-12 12:00 |
03:06:28.32 |
+10:46:02.8 |
HIP 14436 |
2.89 |
| 2026-05-13 00:00 |
03:08:02.31 |
+10:53:10.6 |
HIP 14591 |
7.81 |
| 2026-05-13 12:00 |
03:09:36.55 |
+11:00:17.0 |
HIP 14591 |
21.53 |
| 2026-05-14 00:00 |
03:11:11.04 |
+11:07:21.9 |
HIP 14843 |
7.84 |
| 2026-05-14 12:00 |
03:12:45.78 |
+11:14:25.3 |
HIP 14977 |
4.60 |
| 2026-05-15 00:00 |
03:14:20.78 |
+11:21:27.1 |
HIP 14997 |
19.23 |
| 2026-05-15 12:00 |
03:15:56.03 |
+11:28:27.3 |
HIP 15206 |
9.41 |
| 2026-05-16 00:00 |
03:17:31.54 |
+11:35:25.9 |
HIP 15206 |
21.80 |
| 2026-05-16 12:00 |
03:19:07.29 |
+11:42:22.8 |
HIP 15453 |
15.26 |
| 2026-05-17 00:00 |
03:20:43.30 |
+11:49:18.0 |
HIP 15489 |
19.37 |
| 2026-05-17 12:00 |
03:22:19.56 |
+11:56:11.5 |
HIP 15857 |
28.70 |
| 2026-05-18 00:00 |
03:23:56.07 |
+12:03:03.2 |
HIP 15857 |
12.33 |
| 2026-05-18 12:00 |
03:25:32.82 |
+12:09:53.0 |
HIP 15904 |
11.86 |
| 2026-05-19 00:00 |
03:27:09.83 |
+12:16:41.0 |
HIP 16008 |
19.28 |
| 2026-05-19 12:00 |
03:28:47.09 |
+12:23:27.1 |
HIP 16095 |
29.88 |
| 2026-05-20 00:00 |
03:30:24.59 |
+12:30:11.3 |
HIP 16314 |
24.03 |
| 2026-05-20 12:00 |
03:32:02.34 |
+12:36:53.5 |
HIP 16497 |
16.12 |
| 2026-05-21 00:00 |
03:33:40.34 |
+12:43:33.7 |
HIP 16534 |
18.54 |
| 2026-05-21 12:00 |
03:35:18.58 |
+12:50:11.9 |
HIP 16838 |
29.94 |
| 2026-05-22 00:00 |
03:36:57.07 |
+12:56:48.0 |
HIP 16841 |
20.92 |
| 2026-05-22 12:00 |
03:38:35.80 |
+13:03:22.0 |
HIP 17065 |
19.32 |
| 2026-05-23 00:00 |
03:40:14.78 |
+13:09:53.9 |
HIP 17133 |
2.35 |
| 2026-05-23 12:00 |
03:41:53.99 |
+13:16:23.5 |
HIP 17238 |
16.15 |
| 2026-05-24 00:00 |
03:43:33.46 |
+13:22:51.0 |
HIP 17557 |
30.87 |
| 2026-05-24 12:00 |
03:45:13.16 |
+13:29:16.2 |
HIP 17557 |
15.46 |
| 2026-05-25 00:00 |
03:46:53.10 |
+13:35:39.1 |
HIP 17617 |
8.29 |
| 2026-05-25 12:00 |
03:48:33.29 |
+13:41:59.7 |
HIP 17714 |
26.78 |
| 2026-05-26 00:00 |
03:50:13.71 |
+13:48:17.9 |
HIP 18145 |
38.19 |
| 2026-05-26 12:00 |
03:51:54.37 |
+13:54:33.7 |
HIP 18145 |
13.00 |
| 2026-05-27 00:00 |
03:53:35.27 |
+14:00:47.1 |
HIP 18145 |
12.34 |
| 2026-05-27 12:00 |
03:55:16.40 |
+14:06:58.0 |
HIP 18274 |
23.17 |
| 2026-05-28 00:00 |
03:56:57.78 |
+14:13:06.4 |
HIP 18551 |
18.33 |
| 2026-05-28 12:00 |
03:58:39.38 |
+14:19:12.2 |
HIP 18551 |
10.23 |
| 2026-05-29 00:00 |
04:00:21.22 |
+14:25:15.5 |
HIP 18692 |
6.99 |
| 2026-05-29 12:00 |
04:02:03.29 |
+14:31:16.1 |
HIP 18902 |
15.48 |
| 2026-05-30 00:00 |
04:03:45.60 |
+14:37:14.1 |
HIP 18902 |
12.53 |
| 2026-05-30 12:00 |
04:05:28.13 |
+14:43:09.4 |
HIP 19157 |
23.19 |
| 2026-05-31 00:00 |
04:07:10.89 |
+14:49:02.0 |
HIP 19261 |
22.05 |
| 2026-05-31 12:00 |
04:08:53.88 |
+14:54:51.8 |
HIP 19362 |
22.06 |
| 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 |