メタデータ
| 項目 |
値 |
| Designation |
P/2023 Y2 (Gibbs) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-08-09T20:11:11.523840Z |
| Orbit solution date (soln_date, UTC) |
2025-01-02T20:12:44Z |
| Obs used |
90 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
17.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-12-17T11:22:10.185600Z |
| Discovery magnitude (MPC) |
19.40 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-12-10.0000000 |
| e |
0.39215548 |
| q (au) |
2.275929 |
| a (au) |
3.744261 |
| i (deg) |
6.992785 |
| Ω (om, deg) |
79.230881 |
| ω (w, deg) |
16.802088 |
| M (ma, deg) |
16.618047 |
等級
散乱 + 全体線形
$$
M_a = (11.969 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.969 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-09-20 00:00 |
16:45:40.60 |
-22:53:49.0 |
HIP 82007 |
18.72 |
| 2026-09-20 12:00 |
16:45:55.01 |
-22:54:25.6 |
HIP 82116 |
18.48 |
| 2026-09-21 00:00 |
16:46:09.56 |
-22:55:02.4 |
HIP 82116 |
17.92 |
| 2026-09-21 12:00 |
16:46:24.27 |
-22:55:39.3 |
HIP 82116 |
17.99 |
| 2026-09-22 00:00 |
16:46:39.14 |
-22:56:16.4 |
HIP 82116 |
18.72 |
| 2026-09-22 12:00 |
16:46:54.15 |
-22:56:53.7 |
HIP 82116 |
20.04 |
| 2026-09-23 00:00 |
16:47:09.32 |
-22:57:31.1 |
HIP 82116 |
21.88 |
| 2026-09-23 12:00 |
16:47:24.63 |
-22:58:08.6 |
HIP 82116 |
24.12 |
| 2026-09-24 00:00 |
16:47:40.10 |
-22:58:46.3 |
HIP 82319 |
26.63 |
| 2026-09-24 12:00 |
16:47:55.71 |
-22:59:24.1 |
HIP 82319 |
24.29 |
| 2026-09-25 00:00 |
16:48:11.47 |
-23:00:02.0 |
HIP 82319 |
22.28 |
| 2026-09-25 12:00 |
16:48:27.37 |
-23:00:40.0 |
HIP 82319 |
20.73 |
| 2026-09-26 00:00 |
16:48:43.42 |
-23:01:18.2 |
HIP 82319 |
19.76 |
| 2026-09-26 12:00 |
16:48:59.62 |
-23:01:56.5 |
HIP 82319 |
19.47 |
| 2026-09-27 00:00 |
16:49:15.96 |
-23:02:34.9 |
HIP 82319 |
19.91 |
| 2026-09-27 12:00 |
16:49:32.44 |
-23:03:13.4 |
HIP 82319 |
21.05 |
| 2026-09-28 00:00 |
16:49:49.06 |
-23:03:52.0 |
HIP 82319 |
22.81 |
| 2026-09-28 12:00 |
16:50:05.82 |
-23:04:30.7 |
HIP 82376 |
22.43 |
| 2026-09-29 00:00 |
16:50:22.73 |
-23:05:09.5 |
HIP 82376 |
22.38 |
| 2026-09-29 12:00 |
16:50:39.77 |
-23:05:48.4 |
HIP 82524 |
22.05 |
| 2026-09-30 00:00 |
16:50:56.95 |
-23:06:27.4 |
HIP 82524 |
19.16 |
| 2026-09-30 12:00 |
16:51:14.27 |
-23:07:06.4 |
HIP 82524 |
16.71 |
| 2026-10-01 00:00 |
16:51:31.72 |
-23:07:45.6 |
HIP 82524 |
14.95 |
| 2026-10-01 12:00 |
16:51:49.32 |
-23:08:24.8 |
HIP 82524 |
14.17 |
| 2026-10-02 00:00 |
16:52:07.04 |
-23:09:04.1 |
HIP 82576 |
13.74 |
| 2026-10-02 12:00 |
16:52:24.91 |
-23:09:43.5 |
HIP 82576 |
10.54 |
| 2026-10-03 00:00 |
16:52:42.90 |
-23:10:23.0 |
HIP 82576 |
8.24 |
| 2026-10-03 12:00 |
16:53:01.03 |
-23:11:02.5 |
HIP 82627 |
6.52 |
| 2026-10-04 00:00 |
16:53:19.29 |
-23:11:42.1 |
HIP 82627 |
2.89 |
| 2026-10-04 12:00 |
16:53:37.69 |
-23:12:21.7 |
HIP 82627 |
3.23 |
| 2026-10-05 00:00 |
16:53:56.21 |
-23:13:01.4 |
HIP 82627 |
7.04 |
| 2026-10-05 12:00 |
16:54:14.87 |
-23:13:41.1 |
HIP 82627 |
11.24 |
| 2026-10-06 00:00 |
16:54:33.65 |
-23:14:20.9 |
HIP 82627 |
15.55 |
| 2026-10-06 12:00 |
16:54:52.57 |
-23:15:00.7 |
HIP 82758 |
15.73 |
| 2026-10-07 00:00 |
16:55:11.61 |
-23:15:40.6 |
HIP 82758 |
15.80 |
| 2026-10-07 12:00 |
16:55:30.78 |
-23:16:20.4 |
HIP 82758 |
17.07 |
| 2026-10-08 00:00 |
16:55:50.07 |
-23:17:00.4 |
HIP 82925 |
15.53 |
| 2026-10-08 12:00 |
16:56:09.49 |
-23:17:40.3 |
HIP 82925 |
12.38 |
| 2026-10-09 00:00 |
16:56:29.03 |
-23:18:20.3 |
HIP 82925 |
10.29 |
| 2026-10-09 12:00 |
16:56:48.70 |
-23:19:00.2 |
HIP 82925 |
9.99 |
| 2026-10-10 00:00 |
16:57:08.49 |
-23:19:40.2 |
HIP 82925 |
11.64 |
| 2026-10-10 12:00 |
16:57:28.40 |
-23:20:20.2 |
HIP 82925 |
14.63 |
| 2026-10-11 00:00 |
16:57:48.43 |
-23:21:00.3 |
HIP 83118 |
18.04 |