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) |
| 2026-07-29 00:00 |
16:37:36.28 |
-22:14:50.9 |
HIP 81413 |
11.31 |
| 2026-07-29 12:00 |
16:37:30.13 |
-22:14:55.1 |
HIP 81413 |
11.53 |
| 2026-07-30 00:00 |
16:37:24.20 |
-22:14:59.7 |
HIP 81413 |
11.91 |
| 2026-07-30 12:00 |
16:37:18.48 |
-22:15:04.6 |
HIP 81413 |
12.41 |
| 2026-07-31 00:00 |
16:37:12.97 |
-22:15:09.8 |
HIP 81413 |
13.02 |
| 2026-07-31 12:00 |
16:37:07.68 |
-22:15:15.5 |
HIP 81413 |
13.69 |
| 2026-08-01 00:00 |
16:37:02.59 |
-22:15:21.4 |
HIP 81413 |
14.42 |
| 2026-08-01 12:00 |
16:36:57.72 |
-22:15:27.7 |
HIP 81413 |
15.18 |
| 2026-08-02 00:00 |
16:36:53.06 |
-22:15:34.4 |
HIP 81413 |
15.95 |
| 2026-08-02 12:00 |
16:36:48.61 |
-22:15:41.4 |
HIP 81413 |
16.73 |
| 2026-08-03 00:00 |
16:36:44.38 |
-22:15:48.8 |
HIP 81413 |
17.51 |
| 2026-08-03 12:00 |
16:36:40.35 |
-22:15:56.6 |
HIP 81413 |
18.27 |
| 2026-08-04 00:00 |
16:36:36.54 |
-22:16:04.7 |
HIP 81413 |
19.02 |
| 2026-08-04 12:00 |
16:36:32.94 |
-22:16:13.1 |
HIP 81413 |
19.74 |
| 2026-08-05 00:00 |
16:36:29.56 |
-22:16:22.0 |
HIP 81413 |
20.44 |
| 2026-08-05 12:00 |
16:36:26.39 |
-22:16:31.2 |
HIP 81413 |
21.11 |
| 2026-08-06 00:00 |
16:36:23.43 |
-22:16:40.7 |
HIP 81413 |
21.75 |
| 2026-08-06 12:00 |
16:36:20.68 |
-22:16:50.6 |
HIP 81413 |
22.36 |
| 2026-08-07 00:00 |
16:36:18.15 |
-22:17:00.9 |
HIP 81413 |
22.93 |
| 2026-08-07 12:00 |
16:36:15.83 |
-22:17:11.6 |
HIP 81413 |
23.47 |
| 2026-08-08 00:00 |
16:36:13.72 |
-22:17:22.6 |
HIP 81413 |
23.98 |
| 2026-08-08 12:00 |
16:36:11.83 |
-22:17:34.0 |
HIP 81413 |
24.44 |
| 2026-08-09 00:00 |
16:36:10.15 |
-22:17:45.8 |
HIP 81413 |
24.87 |
| 2026-08-09 12:00 |
16:36:08.68 |
-22:17:57.9 |
HIP 81413 |
25.27 |
| 2026-08-10 00:00 |
16:36:07.43 |
-22:18:10.4 |
HIP 81413 |
25.63 |
| 2026-08-10 12:00 |
16:36:06.39 |
-22:18:23.3 |
HIP 81413 |
25.95 |
| 2026-08-11 00:00 |
16:36:05.56 |
-22:18:36.5 |
HIP 81413 |
26.23 |
| 2026-08-11 12:00 |
16:36:04.95 |
-22:18:50.1 |
HIP 81169 |
26.42 |
| 2026-08-12 00:00 |
16:36:04.54 |
-22:19:04.1 |
HIP 81169 |
26.19 |
| 2026-08-12 12:00 |
16:36:04.35 |
-22:19:18.5 |
HIP 81169 |
26.00 |
| 2026-08-13 00:00 |
16:36:04.38 |
-22:19:33.2 |
HIP 81169 |
25.83 |
| 2026-08-13 12:00 |
16:36:04.61 |
-22:19:48.3 |
HIP 81169 |
25.71 |
| 2026-08-14 00:00 |
16:36:05.06 |
-22:20:03.7 |
HIP 81169 |
25.61 |
| 2026-08-14 12:00 |
16:36:05.72 |
-22:20:19.5 |
HIP 81169 |
25.55 |
| 2026-08-15 00:00 |
16:36:06.59 |
-22:20:35.7 |
HIP 81169 |
25.53 |
| 2026-08-15 12:00 |
16:36:07.67 |
-22:20:52.3 |
HIP 81169 |
25.55 |
| 2026-08-16 00:00 |
16:36:08.96 |
-22:21:09.2 |
HIP 81169 |
25.60 |
| 2026-08-16 12:00 |
16:36:10.46 |
-22:21:26.5 |
HIP 81169 |
25.70 |
| 2026-08-17 00:00 |
16:36:12.16 |
-22:21:44.1 |
HIP 81169 |
25.84 |
| 2026-08-17 12:00 |
16:36:14.08 |
-22:22:02.1 |
HIP 81169 |
26.03 |
| 2026-08-18 00:00 |
16:36:16.21 |
-22:22:20.5 |
HIP 81169 |
26.26 |
| 2026-08-18 12:00 |
16:36:18.54 |
-22:22:39.2 |
HIP 81169 |
26.54 |
| 2026-08-19 00:00 |
16:36:21.08 |
-22:22:58.2 |
HIP 81413 |
26.40 |