メタデータ
| 項目 |
値 |
| Designation |
C/2024 G2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-06-13T13:01:21.555840Z |
| Orbit solution date (soln_date, UTC) |
2026-05-28T12:12:15Z |
| Obs used |
669 |
| NEO |
- |
| M1 |
4.600 |
| K1 |
13.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2024-04-08T07:54:38.131200Z |
| Discovery magnitude (MPC) |
18.63 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) |
2025-08-13.0000000 |
| e |
0.99265479 |
| q (au) |
5.348247 |
| a (au) |
728.127328 |
| i (deg) |
122.124048 |
| Ω (om, deg) |
171.397617 |
| ω (w, deg) |
328.738958 |
| M (ma, deg) |
0.003033 |
等級
散乱 + 全体線形
$$
M_a = (3.198 + 5.732\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.198 |
| n |
5.732 |
| gf |
0.999 |
| gb |
-0.501 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
10:48:02.85 |
+12:50:20.0 |
HIP 52915 |
18.75 |
| 2026-06-01 12:00 |
10:48:01.21 |
+12:52:32.8 |
HIP 52746 |
17.46 |
| 2026-06-02 00:00 |
10:47:59.73 |
+12:54:44.1 |
HIP 52746 |
16.02 |
| 2026-06-02 12:00 |
10:47:58.42 |
+12:56:54.0 |
HIP 52746 |
14.81 |
| 2026-06-03 00:00 |
10:47:57.26 |
+12:59:02.5 |
HIP 52746 |
13.88 |
| 2026-06-03 12:00 |
10:47:56.27 |
+13:01:09.6 |
HIP 52746 |
13.29 |
| 2026-06-04 00:00 |
10:47:55.44 |
+13:03:15.4 |
HIP 52746 |
13.07 |
| 2026-06-04 12:00 |
10:47:54.76 |
+13:05:19.8 |
HIP 52746 |
13.21 |
| 2026-06-05 00:00 |
10:47:54.25 |
+13:07:22.9 |
HIP 52746 |
13.70 |
| 2026-06-05 12:00 |
10:47:53.89 |
+13:09:24.6 |
HIP 52746 |
14.49 |
| 2026-06-06 00:00 |
10:47:53.69 |
+13:11:25.0 |
HIP 52775 |
13.35 |
| 2026-06-06 12:00 |
10:47:53.64 |
+13:13:24.1 |
HIP 52775 |
11.70 |
| 2026-06-07 00:00 |
10:47:53.75 |
+13:15:21.9 |
HIP 52775 |
10.22 |
| 2026-06-07 12:00 |
10:47:54.01 |
+13:17:18.4 |
HIP 52775 |
8.97 |
| 2026-06-08 00:00 |
10:47:54.43 |
+13:19:13.6 |
HIP 52775 |
8.05 |
| 2026-06-08 12:00 |
10:47:55.00 |
+13:21:07.5 |
HIP 52775 |
7.55 |
| 2026-06-09 00:00 |
10:47:55.72 |
+13:23:00.1 |
HIP 52775 |
7.56 |
| 2026-06-09 12:00 |
10:47:56.59 |
+13:24:51.4 |
HIP 52775 |
8.05 |
| 2026-06-10 00:00 |
10:47:57.61 |
+13:26:41.5 |
HIP 52775 |
8.93 |
| 2026-06-10 12:00 |
10:47:58.78 |
+13:28:30.4 |
HIP 52775 |
10.10 |
| 2026-06-11 00:00 |
10:48:00.10 |
+13:30:18.0 |
HIP 52775 |
11.46 |
| 2026-06-11 12:00 |
10:48:01.57 |
+13:32:04.4 |
HIP 52775 |
12.95 |
| 2026-06-12 00:00 |
10:48:03.18 |
+13:33:49.6 |
HIP 52775 |
14.51 |
| 2026-06-12 12:00 |
10:48:04.94 |
+13:35:33.6 |
HIP 52775 |
16.13 |
| 2026-06-13 00:00 |
10:48:06.85 |
+13:37:16.4 |
HIP 52775 |
17.79 |
| 2026-06-13 12:00 |
10:48:08.90 |
+13:38:58.0 |
HIP 52775 |
19.46 |
| 2026-06-14 00:00 |
10:48:11.09 |
+13:40:38.4 |
HIP 52775 |
21.16 |
| 2026-06-14 12:00 |
10:48:13.43 |
+13:42:17.6 |
HIP 52775 |
22.86 |
| 2026-06-15 00:00 |
10:48:15.91 |
+13:43:55.7 |
HIP 52775 |
24.58 |
| 2026-06-15 12:00 |
10:48:18.53 |
+13:45:32.7 |
HIP 52775 |
26.29 |
| 2026-06-16 00:00 |
10:48:21.29 |
+13:47:08.5 |
HIP 52824 |
25.92 |
| 2026-06-16 12:00 |
10:48:24.18 |
+13:48:43.2 |
HIP 52824 |
24.50 |
| 2026-06-17 00:00 |
10:48:27.22 |
+13:50:16.8 |
HIP 52824 |
23.14 |
| 2026-06-17 12:00 |
10:48:30.39 |
+13:51:49.2 |
HIP 52824 |
21.87 |
| 2026-06-18 00:00 |
10:48:33.70 |
+13:53:20.6 |
HIP 52824 |
20.69 |
| 2026-06-18 12:00 |
10:48:37.14 |
+13:54:50.9 |
HIP 52824 |
19.62 |
| 2026-06-19 00:00 |
10:48:40.72 |
+13:56:20.1 |
HIP 52824 |
18.68 |
| 2026-06-19 12:00 |
10:48:44.43 |
+13:57:48.3 |
HIP 52824 |
17.88 |
| 2026-06-20 00:00 |
10:48:48.27 |
+13:59:15.4 |
HIP 52824 |
17.26 |
| 2026-06-20 12:00 |
10:48:52.24 |
+14:00:41.5 |
HIP 52824 |
16.83 |
| 2026-06-21 00:00 |
10:48:56.34 |
+14:02:06.6 |
HIP 52824 |
16.60 |
| 2026-06-21 12:00 |
10:49:00.57 |
+14:03:30.6 |
HIP 52824 |
16.59 |
| 2026-06-22 00:00 |
10:49:04.93 |
+14:04:53.7 |
HIP 52824 |
16.79 |