398P/Boattini
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) |
| 2026-02-03 00:00 |
23:06:10.54 |
-12:17:43.3 |
HIP 113945 |
25.49 |
| 2026-02-03 12:00 |
23:07:07.46 |
-12:12:13.2 |
HIP 114182 |
24.18 |
| 2026-02-04 00:00 |
23:08:04.52 |
-12:06:41.7 |
HIP 114182 |
20.77 |
| 2026-02-04 12:00 |
23:09:01.72 |
-12:01:08.8 |
HIP 114182 |
27.02 |
| 2026-02-05 00:00 |
23:09:59.06 |
-11:55:34.6 |
HIP 114419 |
27.33 |
| 2026-02-05 12:00 |
23:10:56.54 |
-11:49:59.1 |
HIP 114536 |
16.55 |
| 2026-02-06 00:00 |
23:11:54.17 |
-11:44:22.2 |
HIP 114536 |
11.71 |
| 2026-02-06 12:00 |
23:12:51.93 |
-11:38:43.9 |
HIP 114536 |
21.51 |
| 2026-02-07 00:00 |
23:13:49.84 |
-11:33:04.3 |
HIP 114804 |
22.32 |
| 2026-02-07 12:00 |
23:14:47.89 |
-11:27:23.3 |
HIP 114804 |
10.40 |
| 2026-02-08 00:00 |
23:15:46.08 |
-11:21:41.0 |
HIP 114804 |
13.71 |
| 2026-02-08 12:00 |
23:16:44.42 |
-11:15:57.4 |
HIP 115031 |
17.03 |
| 2026-02-09 00:00 |
23:17:42.89 |
-11:10:12.4 |
HIP 115031 |
6.24 |
| 2026-02-09 12:00 |
23:18:41.51 |
-11:04:26.1 |
HIP 115031 |
16.32 |
| 2026-02-10 00:00 |
23:19:40.27 |
-10:58:38.4 |
HIP 115342 |
31.25 |
| 2026-02-10 12:00 |
23:20:39.18 |
-10:52:49.4 |
HIP 115342 |
16.05 |
| 2026-02-11 00:00 |
23:21:38.23 |
-10:46:59.1 |
HIP 115342 |
4.96 |
| 2026-02-11 12:00 |
23:22:37.41 |
-10:41:07.4 |
HIP 115445 |
8.21 |
| 2026-02-12 00:00 |
23:23:36.75 |
-10:35:14.5 |
HIP 115445 |
13.26 |
| 2026-02-12 12:00 |
23:24:36.22 |
-10:29:20.2 |
HIP 115445 |
27.94 |
| 2026-02-13 00:00 |
23:25:35.84 |
-10:23:24.5 |
HIP 115712 |
26.03 |
| 2026-02-13 12:00 |
23:26:35.60 |
-10:17:27.6 |
HIP 115712 |
15.41 |
| 2026-02-14 00:00 |
23:27:35.51 |
-10:11:29.4 |
HIP 115712 |
17.37 |
| 2026-02-14 12:00 |
23:28:35.56 |
-10:05:29.9 |
HIP 115712 |
29.56 |
| 2026-02-15 00:00 |
23:29:35.75 |
-09:59:29.0 |
HIP 116048 |
21.08 |
| 2026-02-15 12:00 |
23:30:36.08 |
-09:53:26.9 |
HIP 116048 |
16.34 |
| 2026-02-16 00:00 |
23:31:36.56 |
-09:47:23.5 |
HIP 116048 |
24.61 |
| 2026-02-16 12:00 |
23:32:37.18 |
-09:41:18.8 |
HIP 116329 |
25.20 |
| 2026-02-17 00:00 |
23:33:37.95 |
-09:35:12.8 |
HIP 116329 |
12.57 |
| 2026-02-17 12:00 |
23:34:38.86 |
-09:29:05.6 |
HIP 116329 |
14.31 |
| 2026-02-18 00:00 |
23:35:39.92 |
-09:22:57.0 |
HIP 116404 |
19.35 |
| 2026-02-18 12:00 |
23:36:41.11 |
-09:16:47.3 |
HIP 116664 |
27.67 |
| 2026-02-19 00:00 |
23:37:42.46 |
-09:10:36.2 |
HIP 116664 |
15.08 |
| 2026-02-19 12:00 |
23:38:43.94 |
-09:04:23.9 |
HIP 116664 |
14.98 |
| 2026-02-20 00:00 |
23:39:45.57 |
-08:58:10.4 |
HIP 116664 |
27.58 |
| 2026-02-20 12:00 |
23:40:47.35 |
-08:51:55.6 |
HIP 116891 |
12.25 |
| 2026-02-21 00:00 |
23:41:49.27 |
-08:45:39.6 |
HIP 116891 |
5.06 |
| 2026-02-21 12:00 |
23:42:51.33 |
-08:39:22.4 |
HIP 116951 |
12.58 |
| 2026-02-22 00:00 |
23:43:53.54 |
-08:33:03.9 |
HIP 117127 |
13.10 |
| 2026-02-22 12:00 |
23:44:55.89 |
-08:26:44.3 |
HIP 117127 |
3.58 |
| 2026-02-23 00:00 |
23:45:58.39 |
-08:20:23.4 |
HIP 117127 |
20.28 |
| 2026-02-23 12:00 |
23:47:01.03 |
-08:14:01.3 |
HIP 117317 |
9.81 |
| 2026-02-24 00:00 |
23:48:03.81 |
-08:07:38.0 |
HIP 117439 |
10.50 |