メタデータ
| 項目 |
値 |
| Designation |
C/2022 Y1 (Hogan) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-11-27T05:12:59.653440Z |
| Orbit solution date (soln_date, UTC) |
2023-06-01T23:12:56Z |
| Obs used |
117 |
| NEO |
- |
| M1 |
13.300 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-12-17T10:28:21.676800Z |
| Discovery magnitude (MPC) |
19.72 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) |
2023-01-04.0000000 |
| e |
0.76423431 |
| q (au) |
2.957709 |
| a (au) |
12.545122 |
| i (deg) |
18.858872 |
| Ω (om, deg) |
285.915047 |
| ω (w, deg) |
174.737499 |
| M (ma, deg) |
0.838077 |
等級
散乱 + 全体線形
$$
M_a = (18.661 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.661 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.739 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
14:18:07.11 |
-33:05:35.0 |
HIP 69902 |
3.76 |
| 2026-06-01 12:00 |
14:17:58.26 |
-33:04:12.6 |
HIP 69902 |
5.13 |
| 2026-06-02 00:00 |
14:17:49.50 |
-33:02:50.0 |
HIP 69902 |
7.00 |
| 2026-06-02 12:00 |
14:17:40.83 |
-33:01:27.4 |
HIP 69902 |
9.04 |
| 2026-06-03 00:00 |
14:17:32.25 |
-33:00:04.7 |
HIP 69902 |
11.16 |
| 2026-06-03 12:00 |
14:17:23.77 |
-32:58:41.9 |
HIP 69902 |
13.31 |
| 2026-06-04 00:00 |
14:17:15.38 |
-32:57:19.1 |
HIP 69717 |
13.10 |
| 2026-06-04 12:00 |
14:17:07.08 |
-32:55:56.1 |
HIP 69717 |
11.25 |
| 2026-06-05 00:00 |
14:16:58.88 |
-32:54:33.2 |
HIP 69717 |
9.58 |
| 2026-06-05 12:00 |
14:16:50.78 |
-32:53:10.2 |
HIP 69717 |
8.19 |
| 2026-06-06 00:00 |
14:16:42.78 |
-32:51:47.2 |
HIP 69717 |
7.23 |
| 2026-06-06 12:00 |
14:16:34.87 |
-32:50:24.1 |
HIP 69717 |
6.86 |
| 2026-06-07 00:00 |
14:16:27.06 |
-32:49:01.1 |
HIP 69717 |
7.16 |
| 2026-06-07 12:00 |
14:16:19.36 |
-32:47:38.0 |
HIP 69717 |
8.05 |
| 2026-06-08 00:00 |
14:16:11.75 |
-32:46:14.9 |
HIP 69717 |
9.35 |
| 2026-06-08 12:00 |
14:16:04.24 |
-32:44:51.9 |
HIP 69717 |
10.90 |
| 2026-06-09 00:00 |
14:15:56.84 |
-32:43:28.9 |
HIP 69717 |
12.60 |
| 2026-06-09 12:00 |
14:15:49.54 |
-32:42:05.9 |
HIP 69717 |
14.40 |
| 2026-06-10 00:00 |
14:15:42.34 |
-32:40:43.0 |
HIP 69717 |
16.25 |
| 2026-06-10 12:00 |
14:15:35.24 |
-32:39:20.1 |
HIP 69717 |
18.14 |
| 2026-06-11 00:00 |
14:15:28.25 |
-32:37:57.3 |
HIP 69717 |
20.04 |
| 2026-06-11 12:00 |
14:15:21.36 |
-32:36:34.6 |
HIP 69717 |
21.95 |
| 2026-06-12 00:00 |
14:15:14.58 |
-32:35:11.9 |
HIP 69717 |
23.86 |
| 2026-06-12 12:00 |
14:15:07.91 |
-32:33:49.3 |
HIP 69465 |
25.25 |
| 2026-06-13 00:00 |
14:15:01.35 |
-32:32:26.9 |
HIP 69465 |
23.46 |
| 2026-06-13 12:00 |
14:14:54.89 |
-32:31:04.5 |
HIP 69465 |
21.71 |
| 2026-06-14 00:00 |
14:14:48.54 |
-32:29:42.3 |
HIP 69465 |
20.02 |
| 2026-06-14 12:00 |
14:14:42.30 |
-32:28:20.2 |
HIP 69465 |
18.39 |
| 2026-06-15 00:00 |
14:14:36.16 |
-32:26:58.2 |
HIP 69465 |
16.84 |
| 2026-06-15 12:00 |
14:14:30.14 |
-32:25:36.4 |
HIP 69465 |
15.39 |
| 2026-06-16 00:00 |
14:14:24.23 |
-32:24:14.8 |
HIP 69465 |
14.07 |
| 2026-06-16 12:00 |
14:14:18.43 |
-32:22:53.3 |
HIP 69465 |
12.89 |
| 2026-06-17 00:00 |
14:14:12.74 |
-32:21:32.0 |
HIP 69465 |
11.90 |
| 2026-06-17 12:00 |
14:14:07.17 |
-32:20:10.8 |
HIP 69465 |
11.14 |
| 2026-06-18 00:00 |
14:14:01.70 |
-32:18:49.9 |
HIP 69465 |
10.65 |
| 2026-06-18 12:00 |
14:13:56.35 |
-32:17:29.1 |
HIP 69465 |
10.46 |
| 2026-06-19 00:00 |
14:13:51.12 |
-32:16:08.6 |
HIP 69465 |
10.58 |
| 2026-06-19 12:00 |
14:13:45.99 |
-32:14:48.3 |
HIP 69465 |
10.98 |
| 2026-06-20 00:00 |
14:13:40.98 |
-32:13:28.2 |
HIP 69524 |
10.98 |
| 2026-06-20 12:00 |
14:13:36.09 |
-32:12:08.4 |
HIP 69524 |
10.07 |
| 2026-06-21 00:00 |
14:13:31.30 |
-32:10:48.8 |
HIP 69524 |
9.38 |
| 2026-06-21 12:00 |
14:13:26.64 |
-32:09:29.4 |
HIP 69524 |
8.94 |
| 2026-06-22 00:00 |
14:13:22.08 |
-32:08:10.3 |
HIP 69524 |
8.77 |