387P/Boattini
メタデータ
| 項目 |
値 |
| Designation |
387P/Boattini |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-09-05T08:47:45.003840Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:43:04Z |
| Obs used |
347 |
| NEO |
Yes |
| M1 |
14.200 |
| K1 |
20.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-09-02T00:13:13.152000Z |
| Discovery magnitude (MPC) |
15.80 R |
| Discovery observatory (MPC) |
L51 · MARGO, Nauchnyi |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-04-08.0000000 |
| e |
0.73595147 |
| q (au) |
1.267166 |
| a (au) |
4.798990 |
| i (deg) |
8.899824 |
| Ω (om, deg) |
259.355998 |
| ω (w, deg) |
162.776863 |
| M (ma, deg) |
208.931599 |
等級
散乱 + 全体線形
$$
M_a = (14.112 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.112 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.502 |
| k |
1.000 |
| 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 |
17:03:23.12 |
-23:59:14.9 |
HIP 83461 |
15.31 |
| 2026-02-03 12:00 |
17:03:34.43 |
-23:59:27.6 |
HIP 83461 |
15.05 |
| 2026-02-04 00:00 |
17:03:45.64 |
-23:59:40.2 |
HIP 83461 |
15.23 |
| 2026-02-04 12:00 |
17:03:56.77 |
-23:59:52.7 |
HIP 83461 |
15.82 |
| 2026-02-05 00:00 |
17:04:07.81 |
-24:00:05.0 |
HIP 83540 |
15.03 |
| 2026-02-05 12:00 |
17:04:18.75 |
-24:00:17.1 |
HIP 83540 |
14.28 |
| 2026-02-06 00:00 |
17:04:29.60 |
-24:00:29.1 |
HIP 83540 |
13.94 |
| 2026-02-06 12:00 |
17:04:40.36 |
-24:00:40.9 |
HIP 83540 |
14.04 |
| 2026-02-07 00:00 |
17:04:51.02 |
-24:00:52.6 |
HIP 83540 |
14.55 |
| 2026-02-07 12:00 |
17:05:01.58 |
-24:01:04.1 |
HIP 83540 |
15.43 |
| 2026-02-08 00:00 |
17:05:12.05 |
-24:01:15.5 |
HIP 83540 |
16.61 |
| 2026-02-08 12:00 |
17:05:22.43 |
-24:01:26.7 |
HIP 83540 |
18.01 |
| 2026-02-09 00:00 |
17:05:32.70 |
-24:01:37.7 |
HIP 83734 |
18.11 |
| 2026-02-09 12:00 |
17:05:42.88 |
-24:01:48.6 |
HIP 83734 |
15.86 |
| 2026-02-10 00:00 |
17:05:52.95 |
-24:01:59.3 |
HIP 83734 |
13.65 |
| 2026-02-10 12:00 |
17:06:02.93 |
-24:02:09.9 |
HIP 83734 |
11.51 |
| 2026-02-11 00:00 |
17:06:12.81 |
-24:02:20.3 |
HIP 83734 |
9.45 |
| 2026-02-11 12:00 |
17:06:22.58 |
-24:02:30.5 |
HIP 83734 |
7.53 |
| 2026-02-12 00:00 |
17:06:32.25 |
-24:02:40.6 |
HIP 83734 |
5.86 |
| 2026-02-12 12:00 |
17:06:41.82 |
-24:02:50.6 |
HIP 83734 |
4.67 |
| 2026-02-13 00:00 |
17:06:51.29 |
-24:03:00.4 |
HIP 83734 |
4.35 |
| 2026-02-13 12:00 |
17:07:00.65 |
-24:03:10.0 |
HIP 83734 |
5.03 |
| 2026-02-14 00:00 |
17:07:09.90 |
-24:03:19.5 |
HIP 83734 |
6.37 |
| 2026-02-14 12:00 |
17:07:19.05 |
-24:03:28.8 |
HIP 83734 |
8.03 |
| 2026-02-15 00:00 |
17:07:28.09 |
-24:03:37.9 |
HIP 83734 |
9.84 |
| 2026-02-15 12:00 |
17:07:37.03 |
-24:03:46.9 |
HIP 83734 |
11.71 |
| 2026-02-16 00:00 |
17:07:45.85 |
-24:03:55.7 |
HIP 83734 |
13.61 |
| 2026-02-16 12:00 |
17:07:54.57 |
-24:04:04.4 |
HIP 83911 |
15.09 |
| 2026-02-17 00:00 |
17:08:03.18 |
-24:04:12.9 |
HIP 83911 |
13.28 |
| 2026-02-17 12:00 |
17:08:11.67 |
-24:04:21.3 |
HIP 83911 |
11.53 |
| 2026-02-18 00:00 |
17:08:20.06 |
-24:04:29.5 |
HIP 83911 |
9.89 |
| 2026-02-18 12:00 |
17:08:28.33 |
-24:04:37.6 |
HIP 83911 |
8.38 |
| 2026-02-19 00:00 |
17:08:36.49 |
-24:04:45.5 |
HIP 83911 |
7.07 |
| 2026-02-19 12:00 |
17:08:44.54 |
-24:04:53.2 |
HIP 83911 |
6.07 |
| 2026-02-20 00:00 |
17:08:52.47 |
-24:05:00.8 |
HIP 83911 |
5.53 |
| 2026-02-20 12:00 |
17:09:00.29 |
-24:05:08.2 |
HIP 83911 |
5.55 |
| 2026-02-21 00:00 |
17:09:07.99 |
-24:05:15.5 |
HIP 83911 |
6.11 |
| 2026-02-21 12:00 |
17:09:15.58 |
-24:05:22.6 |
HIP 83911 |
7.06 |
| 2026-02-22 00:00 |
17:09:23.05 |
-24:05:29.5 |
HIP 83911 |
8.24 |
| 2026-02-22 12:00 |
17:09:30.40 |
-24:05:36.3 |
HIP 83981 |
9.13 |
| 2026-02-23 00:00 |
17:09:37.64 |
-24:05:43.0 |
HIP 83981 |
7.84 |
| 2026-02-23 12:00 |
17:09:44.75 |
-24:05:49.5 |
HIP 83981 |
6.73 |
| 2026-02-24 00:00 |
17:09:51.75 |
-24:05:55.8 |
HIP 83981 |
5.88 |