メタデータ
| 項目 |
値 |
| Designation |
C/2024 Y1 (Masek) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-11-26T20:36:13.553280Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:00Z |
| Obs used |
98 |
| NEO |
- |
| M1 |
17.800 |
| K1 |
17.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-12-25T01:50:03.552000Z |
| Discovery magnitude (MPC) |
15.30 V |
| Discovery observatory (MPC) |
I47 · Pierre Auger Observatory, Malargüe |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-12-31.0000000 |
| e |
0.98668110 |
| q (au) |
0.822345 |
| a (au) |
61.742672 |
| i (deg) |
64.749901 |
| Ω (om, deg) |
112.545653 |
| ω (w, deg) |
238.138955 |
| M (ma, deg) |
0.069360 |
等級
散乱 + 全体線形
$$
M_a = (15.657 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.657 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-03-26 00:00 |
07:36:10.75 |
+36:42:25.2 |
HIP 37141 |
21.27 |
| 2026-03-26 12:00 |
07:36:07.94 |
+36:42:12.0 |
HIP 37141 |
21.87 |
| 2026-03-27 00:00 |
07:36:05.36 |
+36:41:58.2 |
HIP 37141 |
22.42 |
| 2026-03-27 12:00 |
07:36:03.00 |
+36:41:43.9 |
HIP 37141 |
22.94 |
| 2026-03-28 00:00 |
07:36:00.86 |
+36:41:29.1 |
HIP 37141 |
23.41 |
| 2026-03-28 12:00 |
07:35:58.94 |
+36:41:13.7 |
HIP 37141 |
23.85 |
| 2026-03-29 00:00 |
07:35:57.24 |
+36:40:57.8 |
HIP 37141 |
24.24 |
| 2026-03-29 12:00 |
07:35:55.76 |
+36:40:41.5 |
HIP 37141 |
24.60 |
| 2026-03-30 00:00 |
07:35:54.50 |
+36:40:24.6 |
HIP 37141 |
24.92 |
| 2026-03-30 12:00 |
07:35:53.45 |
+36:40:07.3 |
HIP 37141 |
25.20 |
| 2026-03-31 00:00 |
07:35:52.61 |
+36:39:49.4 |
HIP 37141 |
25.44 |
| 2026-03-31 12:00 |
07:35:51.99 |
+36:39:31.2 |
HIP 37141 |
25.65 |
| 2026-04-01 00:00 |
07:35:51.58 |
+36:39:12.4 |
HIP 37141 |
25.82 |
| 2026-04-01 12:00 |
07:35:51.38 |
+36:38:53.2 |
HIP 37141 |
25.96 |
| 2026-04-02 00:00 |
07:35:51.38 |
+36:38:33.6 |
HIP 37141 |
26.06 |
| 2026-04-02 12:00 |
07:35:51.60 |
+36:38:13.5 |
HIP 37141 |
26.13 |
| 2026-04-03 00:00 |
07:35:52.03 |
+36:37:53.1 |
HIP 37141 |
26.17 |
| 2026-04-03 12:00 |
07:35:52.66 |
+36:37:32.1 |
HIP 37141 |
26.18 |
| 2026-04-04 00:00 |
07:35:53.49 |
+36:37:10.8 |
HIP 37141 |
26.15 |
| 2026-04-04 12:00 |
07:35:54.53 |
+36:36:49.1 |
HIP 37141 |
26.10 |
| 2026-04-05 00:00 |
07:35:55.78 |
+36:36:27.0 |
HIP 37141 |
26.02 |
| 2026-04-05 12:00 |
07:35:57.22 |
+36:36:04.5 |
HIP 37141 |
25.91 |
| 2026-04-06 00:00 |
07:35:58.86 |
+36:35:41.6 |
HIP 37141 |
25.78 |
| 2026-04-06 12:00 |
07:36:00.71 |
+36:35:18.4 |
HIP 37141 |
25.62 |
| 2026-04-07 00:00 |
07:36:02.75 |
+36:34:54.8 |
HIP 37141 |
25.45 |
| 2026-04-07 12:00 |
07:36:04.99 |
+36:34:30.8 |
HIP 37141 |
25.25 |
| 2026-04-08 00:00 |
07:36:07.43 |
+36:34:06.5 |
HIP 37141 |
25.03 |
| 2026-04-08 12:00 |
07:36:10.06 |
+36:33:41.8 |
HIP 37141 |
24.80 |
| 2026-04-09 00:00 |
07:36:12.89 |
+36:33:16.8 |
HIP 37141 |
24.56 |
| 2026-04-09 12:00 |
07:36:15.90 |
+36:32:51.4 |
HIP 37141 |
24.30 |
| 2026-04-10 00:00 |
07:36:19.11 |
+36:32:25.7 |
HIP 37141 |
24.04 |
| 2026-04-10 12:00 |
07:36:22.51 |
+36:31:59.7 |
HIP 37141 |
23.77 |
| 2026-04-11 00:00 |
07:36:26.10 |
+36:31:33.4 |
HIP 37141 |
23.50 |
| 2026-04-11 12:00 |
07:36:29.88 |
+36:31:06.7 |
HIP 37141 |
23.24 |
| 2026-04-12 00:00 |
07:36:33.85 |
+36:30:39.8 |
HIP 37141 |
22.98 |
| 2026-04-12 12:00 |
07:36:38.00 |
+36:30:12.6 |
HIP 37141 |
22.74 |
| 2026-04-13 00:00 |
07:36:42.33 |
+36:29:45.1 |
HIP 37141 |
22.51 |
| 2026-04-13 12:00 |
07:36:46.85 |
+36:29:17.2 |
HIP 37141 |
22.31 |
| 2026-04-14 00:00 |
07:36:51.55 |
+36:28:49.1 |
HIP 37141 |
22.13 |
| 2026-04-14 12:00 |
07:36:56.44 |
+36:28:20.8 |
HIP 37182 |
21.91 |
| 2026-04-15 00:00 |
07:37:01.50 |
+36:27:52.1 |
HIP 37182 |
21.41 |
| 2026-04-15 12:00 |
07:37:06.75 |
+36:27:23.2 |
HIP 37182 |
20.95 |
| 2026-04-16 00:00 |
07:37:12.17 |
+36:26:54.1 |
HIP 37182 |
20.52 |