メタデータ
| 項目 |
値 |
| Designation |
P/2025 U1 (Hogan) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2026-03-25T16:23:46.337280Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:33Z |
| Obs used |
80 |
| NEO |
- |
| M1 |
11.100 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-10-30T12:01:04.713600Z |
| Discovery magnitude (MPC) |
20.84 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2025-12-30.0000000 |
| e |
0.29443966 |
| q (au) |
4.165984 |
| a (au) |
5.904504 |
| i (deg) |
23.831966 |
| Ω (om, deg) |
234.962439 |
| ω (w, deg) |
263.984938 |
| M (ma, deg) |
354.113943 |
等級
散乱 + 全体線形
$$
M_a = (13.711 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.711 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
08:04:56.87 |
-07:51:00.0 |
HIP 39654 |
19.84 |
| 2026-03-26 12:00 |
08:04:59.98 |
-07:48:33.5 |
HIP 39654 |
18.54 |
| 2026-03-27 00:00 |
08:05:03.34 |
-07:46:07.3 |
HIP 39654 |
17.46 |
| 2026-03-27 12:00 |
08:05:06.93 |
-07:43:41.5 |
HIP 39654 |
16.66 |
| 2026-03-28 00:00 |
08:05:10.76 |
-07:41:16.2 |
HIP 39654 |
16.17 |
| 2026-03-28 12:00 |
08:05:14.84 |
-07:38:51.2 |
HIP 39654 |
16.03 |
| 2026-03-29 00:00 |
08:05:19.15 |
-07:36:26.7 |
HIP 39654 |
16.27 |
| 2026-03-29 12:00 |
08:05:23.70 |
-07:34:02.7 |
HIP 39654 |
16.86 |
| 2026-03-30 00:00 |
08:05:28.48 |
-07:31:39.2 |
HIP 39654 |
17.80 |
| 2026-03-30 12:00 |
08:05:33.51 |
-07:29:16.1 |
HIP 39654 |
19.02 |
| 2026-03-31 00:00 |
08:05:38.77 |
-07:26:53.6 |
HIP 39654 |
20.50 |
| 2026-03-31 12:00 |
08:05:44.26 |
-07:24:31.6 |
HIP 39654 |
22.18 |
| 2026-04-01 00:00 |
08:05:49.99 |
-07:22:10.1 |
HIP 39654 |
24.03 |
| 2026-04-01 12:00 |
08:05:55.95 |
-07:19:49.3 |
HIP 39654 |
26.02 |
| 2026-04-02 00:00 |
08:06:02.15 |
-07:17:29.0 |
HIP 39654 |
28.13 |
| 2026-04-02 12:00 |
08:06:08.58 |
-07:15:09.2 |
HIP 39654 |
30.34 |
| 2026-04-03 00:00 |
08:06:15.24 |
-07:12:50.1 |
HIP 39654 |
32.63 |
| 2026-04-03 12:00 |
08:06:22.13 |
-07:10:31.7 |
HIP 39654 |
35.00 |
| 2026-04-04 00:00 |
08:06:29.25 |
-07:08:13.8 |
HIP 39654 |
37.43 |
| 2026-04-04 12:00 |
08:06:36.60 |
-07:05:56.7 |
HIP 39654 |
39.92 |
| 2026-04-05 00:00 |
08:06:44.18 |
-07:03:40.1 |
HIP 39626 |
39.35 |
| 2026-04-05 12:00 |
08:06:51.98 |
-07:01:24.3 |
HIP 39626 |
37.98 |
| 2026-04-06 00:00 |
08:07:00.02 |
-06:59:09.2 |
HIP 39626 |
36.83 |
| 2026-04-06 12:00 |
08:07:08.28 |
-06:56:54.8 |
HIP 39626 |
35.94 |
| 2026-04-07 00:00 |
08:07:16.77 |
-06:54:41.1 |
HIP 39626 |
35.33 |
| 2026-04-07 12:00 |
08:07:25.48 |
-06:52:28.1 |
HIP 39626 |
35.03 |
| 2026-04-08 00:00 |
08:07:34.41 |
-06:50:16.0 |
HIP 39626 |
35.05 |
| 2026-04-08 12:00 |
08:07:43.57 |
-06:48:04.5 |
HIP 39626 |
35.40 |
| 2026-04-09 00:00 |
08:07:52.95 |
-06:45:53.9 |
HIP 39997 |
33.17 |
| 2026-04-09 12:00 |
08:08:02.55 |
-06:43:44.0 |
HIP 39997 |
30.78 |
| 2026-04-10 00:00 |
08:08:12.38 |
-06:41:35.0 |
HIP 39997 |
28.50 |
| 2026-04-10 12:00 |
08:08:22.42 |
-06:39:26.8 |
HIP 39997 |
26.36 |
| 2026-04-11 00:00 |
08:08:32.68 |
-06:37:19.4 |
HIP 39997 |
24.43 |
| 2026-04-11 12:00 |
08:08:43.16 |
-06:35:12.9 |
HIP 39997 |
22.76 |
| 2026-04-12 00:00 |
08:08:53.86 |
-06:33:07.2 |
HIP 39997 |
21.43 |
| 2026-04-12 12:00 |
08:09:04.78 |
-06:31:02.4 |
HIP 39997 |
20.53 |
| 2026-04-13 00:00 |
08:09:15.91 |
-06:28:58.5 |
HIP 39997 |
20.13 |
| 2026-04-13 12:00 |
08:09:27.26 |
-06:26:55.5 |
HIP 39997 |
20.27 |
| 2026-04-14 00:00 |
08:09:38.82 |
-06:24:53.4 |
HIP 39997 |
20.97 |
| 2026-04-14 12:00 |
08:09:50.59 |
-06:22:52.2 |
HIP 39997 |
22.19 |
| 2026-04-15 00:00 |
08:10:02.57 |
-06:20:52.0 |
HIP 39997 |
23.86 |
| 2026-04-15 12:00 |
08:10:14.77 |
-06:18:52.7 |
HIP 39997 |
25.91 |
| 2026-04-16 00:00 |
08:10:27.18 |
-06:16:54.4 |
HIP 40110 |
22.97 |