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) |
| 2026-07-29 00:00 |
14:13:06.66 |
-30:49:29.8 |
HIP 69599 |
24.74 |
| 2026-07-29 12:00 |
14:13:10.69 |
-30:48:45.6 |
HIP 69599 |
24.45 |
| 2026-07-30 00:00 |
14:13:14.82 |
-30:48:01.9 |
HIP 69599 |
24.18 |
| 2026-07-30 12:00 |
14:13:19.06 |
-30:47:18.9 |
HIP 69599 |
23.94 |
| 2026-07-31 00:00 |
14:13:23.40 |
-30:46:36.5 |
HIP 69599 |
23.73 |
| 2026-07-31 12:00 |
14:13:27.85 |
-30:45:54.6 |
HIP 69599 |
23.56 |
| 2026-08-01 00:00 |
14:13:32.40 |
-30:45:13.4 |
HIP 69599 |
23.41 |
| 2026-08-01 12:00 |
14:13:37.06 |
-30:44:32.8 |
HIP 69599 |
23.31 |
| 2026-08-02 00:00 |
14:13:41.81 |
-30:43:52.7 |
HIP 69599 |
23.25 |
| 2026-08-02 12:00 |
14:13:46.68 |
-30:43:13.3 |
HIP 69599 |
23.24 |
| 2026-08-03 00:00 |
14:13:51.64 |
-30:42:34.5 |
HIP 69599 |
23.27 |
| 2026-08-03 12:00 |
14:13:56.71 |
-30:41:56.2 |
HIP 69599 |
23.34 |
| 2026-08-04 00:00 |
14:14:01.88 |
-30:41:18.6 |
HIP 69599 |
23.47 |
| 2026-08-04 12:00 |
14:14:07.15 |
-30:40:41.6 |
HIP 69599 |
23.65 |
| 2026-08-05 00:00 |
14:14:12.52 |
-30:40:05.2 |
HIP 69599 |
23.88 |
| 2026-08-05 12:00 |
14:14:17.99 |
-30:39:29.3 |
HIP 69599 |
24.16 |
| 2026-08-06 00:00 |
14:14:23.57 |
-30:38:54.1 |
HIP 69599 |
24.50 |
| 2026-08-06 12:00 |
14:14:29.24 |
-30:38:19.5 |
HIP 69599 |
24.89 |
| 2026-08-07 00:00 |
14:14:35.02 |
-30:37:45.6 |
HIP 69599 |
25.34 |
| 2026-08-07 12:00 |
14:14:40.89 |
-30:37:12.2 |
HIP 69599 |
25.84 |
| 2026-08-08 00:00 |
14:14:46.86 |
-30:36:39.4 |
HIP 69560 |
25.82 |
| 2026-08-08 12:00 |
14:14:52.94 |
-30:36:07.3 |
HIP 69560 |
25.63 |
| 2026-08-09 00:00 |
14:14:59.11 |
-30:35:35.7 |
HIP 69560 |
25.53 |
| 2026-08-09 12:00 |
14:15:05.37 |
-30:35:04.8 |
HIP 69560 |
25.53 |
| 2026-08-10 00:00 |
14:15:11.74 |
-30:34:34.5 |
HIP 69560 |
25.63 |
| 2026-08-10 12:00 |
14:15:18.20 |
-30:34:04.8 |
HIP 69560 |
25.83 |
| 2026-08-11 00:00 |
14:15:24.76 |
-30:33:35.7 |
HIP 69560 |
26.14 |
| 2026-08-11 12:00 |
14:15:31.42 |
-30:33:07.3 |
HIP 69560 |
26.54 |
| 2026-08-12 00:00 |
14:15:38.17 |
-30:32:39.4 |
HIP 69560 |
27.05 |
| 2026-08-12 12:00 |
14:15:45.02 |
-30:32:12.2 |
HIP 69560 |
27.65 |
| 2026-08-13 00:00 |
14:15:51.97 |
-30:31:45.6 |
HIP 69771 |
28.10 |
| 2026-08-13 12:00 |
14:15:59.00 |
-30:31:19.6 |
HIP 69771 |
27.93 |
| 2026-08-14 00:00 |
14:16:06.14 |
-30:30:54.2 |
HIP 69771 |
27.84 |
| 2026-08-14 12:00 |
14:16:13.36 |
-30:30:29.4 |
HIP 69771 |
27.83 |
| 2026-08-15 00:00 |
14:16:20.68 |
-30:30:05.3 |
HIP 69905 |
26.71 |
| 2026-08-15 12:00 |
14:16:28.09 |
-30:29:41.7 |
HIP 69905 |
25.17 |
| 2026-08-16 00:00 |
14:16:35.59 |
-30:29:18.8 |
HIP 69905 |
23.62 |
| 2026-08-16 12:00 |
14:16:43.19 |
-30:28:56.5 |
HIP 69905 |
22.07 |
| 2026-08-17 00:00 |
14:16:50.87 |
-30:28:34.8 |
HIP 69905 |
20.51 |
| 2026-08-17 12:00 |
14:16:58.65 |
-30:28:13.7 |
HIP 69905 |
18.96 |
| 2026-08-18 00:00 |
14:17:06.51 |
-30:27:53.3 |
HIP 69905 |
17.41 |
| 2026-08-18 12:00 |
14:17:14.47 |
-30:27:33.4 |
HIP 69905 |
15.88 |
| 2026-08-19 00:00 |
14:17:22.51 |
-30:27:14.1 |
HIP 69905 |
14.38 |