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
$$
M_a = (10.242 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.242 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.964 |
| 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) |
| 2026-05-12 00:00 |
13:08:57.03 |
-35:42:26.9 |
HIP 64099 |
15.56 |
| 2026-05-12 12:00 |
13:08:34.10 |
-35:37:23.3 |
HIP 64099 |
8.74 |
| 2026-05-13 00:00 |
13:08:11.36 |
-35:32:19.4 |
HIP 64099 |
2.27 |
| 2026-05-13 12:00 |
13:07:48.80 |
-35:27:15.1 |
HIP 64099 |
5.27 |
| 2026-05-14 00:00 |
13:07:26.42 |
-35:22:10.4 |
HIP 64099 |
11.98 |
| 2026-05-14 12:00 |
13:07:04.24 |
-35:17:05.5 |
HIP 63890 |
18.38 |
| 2026-05-15 00:00 |
13:06:42.24 |
-35:12:00.2 |
HIP 63908 |
12.44 |
| 2026-05-15 12:00 |
13:06:20.43 |
-35:06:54.8 |
HIP 63908 |
6.81 |
| 2026-05-16 00:00 |
13:05:58.81 |
-35:01:49.1 |
HIP 63908 |
5.44 |
| 2026-05-16 12:00 |
13:05:37.39 |
-34:56:43.2 |
HIP 63908 |
10.19 |
| 2026-05-17 00:00 |
13:05:16.16 |
-34:51:37.2 |
HIP 63908 |
16.37 |
| 2026-05-17 12:00 |
13:04:55.12 |
-34:46:31.1 |
HIP 63908 |
22.84 |
| 2026-05-18 00:00 |
13:04:34.28 |
-34:41:24.9 |
HIP 63737 |
28.22 |
| 2026-05-18 12:00 |
13:04:13.64 |
-34:36:18.6 |
HIP 63737 |
22.05 |
| 2026-05-19 00:00 |
13:03:53.19 |
-34:31:12.3 |
HIP 63737 |
16.26 |
| 2026-05-19 12:00 |
13:03:32.94 |
-34:26:05.9 |
HIP 63737 |
11.40 |
| 2026-05-20 00:00 |
13:03:12.89 |
-34:20:59.7 |
HIP 63737 |
9.06 |
| 2026-05-20 12:00 |
13:02:53.04 |
-34:15:53.4 |
HIP 63737 |
10.95 |
| 2026-05-21 00:00 |
13:02:33.40 |
-34:10:47.3 |
HIP 63737 |
15.57 |
| 2026-05-21 12:00 |
13:02:13.95 |
-34:05:41.2 |
HIP 63537 |
18.35 |
| 2026-05-22 00:00 |
13:01:54.70 |
-34:00:35.3 |
HIP 63537 |
11.93 |
| 2026-05-22 12:00 |
13:01:35.66 |
-33:55:29.6 |
HIP 63537 |
5.66 |
| 2026-05-23 00:00 |
13:01:16.82 |
-33:50:24.0 |
HIP 63537 |
2.22 |
| 2026-05-23 12:00 |
13:00:58.18 |
-33:45:18.7 |
HIP 63537 |
7.75 |
| 2026-05-24 00:00 |
13:00:39.74 |
-33:40:13.6 |
HIP 63490 |
10.03 |
| 2026-05-24 12:00 |
13:00:21.51 |
-33:35:08.8 |
HIP 63490 |
5.37 |
| 2026-05-25 00:00 |
13:00:03.48 |
-33:30:04.2 |
HIP 63490 |
6.10 |
| 2026-05-25 12:00 |
12:59:45.66 |
-33:25:00.0 |
HIP 63490 |
11.15 |
| 2026-05-26 00:00 |
12:59:28.04 |
-33:19:56.2 |
HIP 63490 |
17.02 |
| 2026-05-26 12:00 |
12:59:10.63 |
-33:14:52.7 |
HIP 63451 |
20.27 |
| 2026-05-27 00:00 |
12:58:53.42 |
-33:09:49.6 |
HIP 63451 |
19.23 |
| 2026-05-27 12:00 |
12:58:36.41 |
-33:04:46.9 |
HIP 63300 |
15.74 |
| 2026-05-28 00:00 |
12:58:19.61 |
-32:59:44.7 |
HIP 63300 |
10.29 |
| 2026-05-28 12:00 |
12:58:03.01 |
-32:54:42.9 |
HIP 63300 |
6.28 |
| 2026-05-29 00:00 |
12:57:46.62 |
-32:49:41.7 |
HIP 63300 |
6.87 |
| 2026-05-29 12:00 |
12:57:30.44 |
-32:44:40.9 |
HIP 63300 |
11.32 |
| 2026-05-30 00:00 |
12:57:14.46 |
-32:39:40.7 |
HIP 63300 |
16.78 |
| 2026-05-30 12:00 |
12:56:58.68 |
-32:34:41.0 |
HIP 63251 |
18.50 |
| 2026-05-31 00:00 |
12:56:43.11 |
-32:29:41.9 |
HIP 63251 |
16.26 |
| 2026-05-31 12:00 |
12:56:27.74 |
-32:24:43.4 |
HIP 63251 |
16.03 |
| 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 |