メタデータ
| 項目 |
値 |
| Designation |
C/2024 M1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-11-20T00:40:14.862720Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:43:02Z |
| Obs used |
1565 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-06-29T10:08:51.388800Z |
| Discovery magnitude (MPC) |
17.86 o |
| Discovery observatory (MPC) |
W68 · ATLAS Chile, Rio Hurtado |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-12-03.0000000 |
| e |
0.94309352 |
| q (au) |
1.703373 |
| a (au) |
29.932839 |
| i (deg) |
73.710121 |
| Ω (om, deg) |
76.215098 |
| ω (w, deg) |
345.599965 |
| M (ma, deg) |
0.078071 |
等級
散乱 + 全体線形
$$
M_a = (14.267 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.267 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.732 |
| k |
0.971 |
| δ90 |
1.000 |
| 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) |
| 2026-07-29 00:00 |
15:06:00.78 |
+52:57:50.1 |
HIP 74019 |
14.23 |
| 2026-07-29 12:00 |
15:05:59.99 |
+52:52:34.7 |
HIP 74019 |
15.89 |
| 2026-07-30 00:00 |
15:05:59.43 |
+52:47:19.4 |
HIP 74019 |
18.89 |
| 2026-07-30 12:00 |
15:05:59.11 |
+52:42:04.1 |
HIP 73895 |
17.21 |
| 2026-07-31 00:00 |
15:05:59.03 |
+52:36:48.7 |
HIP 73895 |
11.99 |
| 2026-07-31 12:00 |
15:05:59.17 |
+52:31:33.4 |
HIP 73895 |
6.83 |
| 2026-08-01 00:00 |
15:05:59.55 |
+52:26:18.1 |
HIP 73895 |
2.16 |
| 2026-08-01 12:00 |
15:06:00.15 |
+52:21:02.9 |
HIP 73895 |
4.21 |
| 2026-08-02 00:00 |
15:06:00.98 |
+52:15:47.8 |
HIP 73944 |
5.67 |
| 2026-08-02 12:00 |
15:06:02.04 |
+52:10:32.7 |
HIP 73944 |
8.49 |
| 2026-08-03 00:00 |
15:06:03.31 |
+52:05:17.8 |
HIP 73944 |
12.92 |
| 2026-08-03 12:00 |
15:06:04.81 |
+52:00:02.9 |
HIP 73944 |
17.79 |
| 2026-08-04 00:00 |
15:06:06.53 |
+51:54:48.2 |
HIP 73944 |
22.82 |
| 2026-08-04 12:00 |
15:06:08.47 |
+51:49:33.6 |
HIP 73894 |
24.33 |
| 2026-08-05 00:00 |
15:06:10.62 |
+51:44:19.1 |
HIP 73894 |
19.09 |
| 2026-08-05 12:00 |
15:06:12.99 |
+51:39:04.9 |
HIP 73894 |
13.86 |
| 2026-08-06 00:00 |
15:06:15.58 |
+51:33:50.8 |
HIP 73894 |
8.66 |
| 2026-08-06 12:00 |
15:06:18.37 |
+51:28:36.9 |
HIP 73894 |
3.62 |
| 2026-08-07 00:00 |
15:06:21.38 |
+51:23:23.2 |
HIP 73894 |
2.54 |
| 2026-08-07 12:00 |
15:06:24.60 |
+51:18:09.8 |
HIP 73894 |
7.42 |
| 2026-08-08 00:00 |
15:06:28.02 |
+51:12:56.6 |
HIP 73894 |
12.60 |
| 2026-08-08 12:00 |
15:06:31.65 |
+51:07:43.6 |
HIP 73894 |
17.82 |
| 2026-08-09 00:00 |
15:06:35.49 |
+51:02:30.9 |
HIP 73894 |
23.06 |
| 2026-08-09 12:00 |
15:06:39.53 |
+50:57:18.5 |
HIP 74151 |
23.32 |
| 2026-08-10 00:00 |
15:06:43.77 |
+50:52:06.4 |
HIP 74151 |
24.28 |
| 2026-08-10 12:00 |
15:06:48.21 |
+50:46:54.6 |
HIP 74151 |
26.25 |
| 2026-08-11 00:00 |
15:06:52.86 |
+50:41:43.1 |
HIP 74151 |
29.02 |
| 2026-08-11 12:00 |
15:06:57.70 |
+50:36:32.0 |
HIP 74151 |
32.37 |
| 2026-08-12 00:00 |
15:07:02.73 |
+50:31:21.2 |
HIP 74083 |
30.62 |
| 2026-08-12 12:00 |
15:07:07.96 |
+50:26:10.8 |
HIP 74083 |
25.58 |
| 2026-08-13 00:00 |
15:07:13.39 |
+50:21:00.8 |
HIP 74083 |
20.64 |
| 2026-08-13 12:00 |
15:07:19.00 |
+50:15:51.2 |
HIP 74083 |
15.86 |
| 2026-08-14 00:00 |
15:07:24.81 |
+50:10:42.0 |
HIP 74083 |
11.48 |
| 2026-08-14 12:00 |
15:07:30.80 |
+50:05:33.2 |
HIP 74083 |
8.14 |
| 2026-08-15 00:00 |
15:07:36.98 |
+50:00:24.9 |
HIP 74083 |
7.42 |
| 2026-08-15 12:00 |
15:07:43.35 |
+49:55:17.0 |
HIP 74083 |
9.91 |
| 2026-08-16 00:00 |
15:07:49.89 |
+49:50:09.6 |
HIP 74083 |
13.98 |
| 2026-08-16 12:00 |
15:07:56.62 |
+49:45:02.6 |
HIP 74161 |
13.58 |
| 2026-08-17 00:00 |
15:08:03.53 |
+49:39:56.2 |
HIP 74161 |
10.85 |
| 2026-08-17 12:00 |
15:08:10.62 |
+49:34:50.3 |
HIP 74161 |
10.24 |
| 2026-08-18 00:00 |
15:08:17.89 |
+49:29:44.9 |
HIP 74140 |
10.89 |
| 2026-08-18 12:00 |
15:08:25.33 |
+49:24:40.0 |
HIP 74140 |
6.59 |
| 2026-08-19 00:00 |
15:08:32.94 |
+49:19:35.7 |
HIP 74140 |
4.76 |