メタデータ
| 項目 |
値 |
| Designation |
C/2024 G7 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-02-10T07:44:47.034240Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:18Z |
| Obs used |
85 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-04-03T08:20:06.028800Z |
| Discovery magnitude (MPC) |
19.41 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) |
2024-07-18.0000000 |
| e |
1.00160384 |
| q (au) |
6.027571 |
| a (au) |
-3758.217039 |
| i (deg) |
131.518835 |
| Ω (om, deg) |
191.947034 |
| ω (w, deg) |
289.665780 |
| M (ma, deg) |
-0.000887 |
等級
散乱 + 全体線形
$$
M_a = (10.493 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.493 |
| n |
2.000 |
| gf |
0.999 |
| 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) |
| 2026-06-01 00:00 |
12:56:12.58 |
-32:19:45.5 |
HIP 63251 |
17.86 |
| 2026-06-01 12:00 |
12:55:57.62 |
-32:14:48.3 |
HIP 63251 |
21.19 |
| 2026-06-02 00:00 |
12:55:42.87 |
-32:09:51.7 |
HIP 63251 |
25.42 |
| 2026-06-02 12:00 |
12:55:28.32 |
-32:04:55.8 |
HIP 63251 |
30.15 |
| 2026-06-03 00:00 |
12:55:13.98 |
-32:00:00.6 |
HIP 63123 |
32.69 |
| 2026-06-03 12:00 |
12:54:59.84 |
-31:55:06.1 |
HIP 63097 |
28.61 |
| 2026-06-04 00:00 |
12:54:45.90 |
-31:50:12.4 |
HIP 63097 |
25.17 |
| 2026-06-04 12:00 |
12:54:32.16 |
-31:45:19.4 |
HIP 63097 |
22.67 |
| 2026-06-05 00:00 |
12:54:18.63 |
-31:40:27.2 |
HIP 63097 |
21.39 |
| 2026-06-05 12:00 |
12:54:05.31 |
-31:35:35.9 |
HIP 62890 |
17.59 |
| 2026-06-06 00:00 |
12:53:52.18 |
-31:30:45.3 |
HIP 62890 |
12.01 |
| 2026-06-06 12:00 |
12:53:39.26 |
-31:25:55.6 |
HIP 62890 |
6.50 |
| 2026-06-07 00:00 |
12:53:26.54 |
-31:21:06.7 |
HIP 62890 |
1.45 |
| 2026-06-07 12:00 |
12:53:14.02 |
-31:16:18.7 |
HIP 62890 |
4.78 |
| 2026-06-08 00:00 |
12:53:01.70 |
-31:11:31.6 |
HIP 62890 |
10.17 |
| 2026-06-08 12:00 |
12:52:49.58 |
-31:06:45.4 |
HIP 62773 |
13.71 |
| 2026-06-09 00:00 |
12:52:37.67 |
-31:02:00.1 |
HIP 62767 |
11.73 |
| 2026-06-09 12:00 |
12:52:25.95 |
-30:57:15.7 |
HIP 62767 |
11.75 |
| 2026-06-10 00:00 |
12:52:14.44 |
-30:52:32.4 |
HIP 62767 |
14.01 |
| 2026-06-10 12:00 |
12:52:03.12 |
-30:47:50.0 |
HIP 62767 |
17.63 |
| 2026-06-11 00:00 |
12:51:52.00 |
-30:43:08.5 |
HIP 62731 |
16.53 |
| 2026-06-11 12:00 |
12:51:41.09 |
-30:38:28.1 |
HIP 62731 |
11.30 |
| 2026-06-12 00:00 |
12:51:30.37 |
-30:33:48.8 |
HIP 62731 |
6.11 |
| 2026-06-12 12:00 |
12:51:19.85 |
-30:29:10.4 |
HIP 62731 |
0.97 |
| 2026-06-13 00:00 |
12:51:09.52 |
-30:24:33.2 |
HIP 62731 |
4.20 |
| 2026-06-13 12:00 |
12:50:59.40 |
-30:19:57.0 |
HIP 62731 |
9.29 |
| 2026-06-14 00:00 |
12:50:49.47 |
-30:15:21.9 |
HIP 62731 |
14.35 |
| 2026-06-14 12:00 |
12:50:39.73 |
-30:10:47.8 |
HIP 62731 |
19.38 |
| 2026-06-15 00:00 |
12:50:30.20 |
-30:06:14.9 |
HIP 62731 |
24.37 |
| 2026-06-15 12:00 |
12:50:20.85 |
-30:01:43.2 |
HIP 62731 |
29.33 |
| 2026-06-16 00:00 |
12:50:11.70 |
-29:57:12.6 |
HIP 62432 |
33.82 |
| 2026-06-16 12:00 |
12:50:02.75 |
-29:52:43.1 |
HIP 62432 |
30.93 |
| 2026-06-17 00:00 |
12:49:53.99 |
-29:48:14.8 |
HIP 62432 |
28.64 |
| 2026-06-17 12:00 |
12:49:45.42 |
-29:43:47.7 |
HIP 62432 |
27.07 |
| 2026-06-18 00:00 |
12:49:37.04 |
-29:39:21.8 |
HIP 62432 |
26.33 |
| 2026-06-18 12:00 |
12:49:28.85 |
-29:34:57.1 |
HIP 62432 |
26.48 |
| 2026-06-19 00:00 |
12:49:20.85 |
-29:30:33.6 |
HIP 62432 |
27.48 |
| 2026-06-19 12:00 |
12:49:13.04 |
-29:26:11.4 |
HIP 62713 |
29.20 |
| 2026-06-20 00:00 |
12:49:05.42 |
-29:21:50.4 |
HIP 62713 |
28.66 |
| 2026-06-20 12:00 |
12:48:57.99 |
-29:17:30.6 |
HIP 62713 |
28.84 |
| 2026-06-21 00:00 |
12:48:50.74 |
-29:13:12.1 |
HIP 62365 |
29.62 |
| 2026-06-21 12:00 |
12:48:43.68 |
-29:08:54.9 |
HIP 62365 |
26.41 |
| 2026-06-22 00:00 |
12:48:36.81 |
-29:04:39.0 |
HIP 62365 |
23.68 |