メタデータ
| 項目 |
値 |
| Designation |
C/2024 G7 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-02-10T07:30:42.638400Z |
| Orbit solution date (soln_date, UTC) |
2026-07-16T19:12:17Z |
| Obs used |
87 |
| NEO |
- |
| M1 |
11.700 |
| 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) |
2024-08-02.0000000 |
| e |
1.00163060 |
| q (au) |
6.027583 |
| a (au) |
-3696.547778 |
| i (deg) |
131.518826 |
| Ω (om, deg) |
191.947715 |
| ω (w, deg) |
289.665421 |
| M (ma, deg) |
-0.000843 |
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) |
| 2026-09-20 00:00 |
13:02:40.18 |
-22:14:35.9 |
HIP 63889 |
41.96 |
| 2026-09-20 12:00 |
13:02:51.52 |
-22:13:56.6 |
HIP 63889 |
39.25 |
| 2026-09-21 00:00 |
13:03:02.88 |
-22:13:18.0 |
HIP 63889 |
36.55 |
| 2026-09-21 12:00 |
13:03:14.27 |
-22:12:40.1 |
HIP 63889 |
33.84 |
| 2026-09-22 00:00 |
13:03:25.68 |
-22:12:02.9 |
HIP 63889 |
31.12 |
| 2026-09-22 12:00 |
13:03:37.11 |
-22:11:26.4 |
HIP 63889 |
28.41 |
| 2026-09-23 00:00 |
13:03:48.57 |
-22:10:50.6 |
HIP 63889 |
25.69 |
| 2026-09-23 12:00 |
13:04:00.04 |
-22:10:15.4 |
HIP 63889 |
22.98 |
| 2026-09-24 00:00 |
13:04:11.54 |
-22:09:40.9 |
HIP 63889 |
20.26 |
| 2026-09-24 12:00 |
13:04:23.05 |
-22:09:07.0 |
HIP 63889 |
17.54 |
| 2026-09-25 00:00 |
13:04:34.58 |
-22:08:33.8 |
HIP 63889 |
14.82 |
| 2026-09-25 12:00 |
13:04:46.13 |
-22:08:01.2 |
HIP 63889 |
12.11 |
| 2026-09-26 00:00 |
13:04:57.69 |
-22:07:29.3 |
HIP 63889 |
9.40 |
| 2026-09-26 12:00 |
13:05:09.27 |
-22:06:58.0 |
HIP 63889 |
6.71 |
| 2026-09-27 00:00 |
13:05:20.87 |
-22:06:27.3 |
HIP 63889 |
4.09 |
| 2026-09-27 12:00 |
13:05:32.48 |
-22:05:57.2 |
HIP 63889 |
1.85 |
| 2026-09-28 00:00 |
13:05:44.11 |
-22:05:27.7 |
HIP 63889 |
2.25 |
| 2026-09-28 12:00 |
13:05:55.75 |
-22:04:58.9 |
HIP 63889 |
4.67 |
| 2026-09-29 00:00 |
13:06:07.40 |
-22:04:30.6 |
HIP 63889 |
7.32 |
| 2026-09-29 12:00 |
13:06:19.06 |
-22:04:03.0 |
HIP 63889 |
10.02 |
| 2026-09-30 00:00 |
13:06:30.74 |
-22:03:35.9 |
HIP 63889 |
12.74 |
| 2026-09-30 12:00 |
13:06:42.43 |
-22:03:09.4 |
HIP 63889 |
15.47 |
| 2026-10-01 00:00 |
13:06:54.13 |
-22:02:43.5 |
HIP 63889 |
18.21 |
| 2026-10-01 12:00 |
13:07:05.83 |
-22:02:18.2 |
HIP 63889 |
20.95 |
| 2026-10-02 00:00 |
13:07:17.55 |
-22:01:53.4 |
HIP 63889 |
23.69 |
| 2026-10-02 12:00 |
13:07:29.28 |
-22:01:29.1 |
HIP 63889 |
26.44 |
| 2026-10-03 00:00 |
13:07:41.01 |
-22:01:05.5 |
HIP 63889 |
29.18 |
| 2026-10-03 12:00 |
13:07:52.75 |
-22:00:42.4 |
HIP 64219 |
27.61 |
| 2026-10-04 00:00 |
13:08:04.50 |
-22:00:19.8 |
HIP 64219 |
25.29 |
| 2026-10-04 12:00 |
13:08:16.25 |
-21:59:57.7 |
HIP 64219 |
23.07 |
| 2026-10-05 00:00 |
13:08:28.00 |
-21:59:36.2 |
HIP 64219 |
20.96 |
| 2026-10-05 12:00 |
13:08:39.77 |
-21:59:15.2 |
HIP 64219 |
19.00 |
| 2026-10-06 00:00 |
13:08:51.53 |
-21:58:54.7 |
HIP 64219 |
17.26 |
| 2026-10-06 12:00 |
13:09:03.30 |
-21:58:34.7 |
HIP 64219 |
15.79 |
| 2026-10-07 00:00 |
13:09:15.07 |
-21:58:15.2 |
HIP 64219 |
14.69 |
| 2026-10-07 12:00 |
13:09:26.84 |
-21:57:56.3 |
HIP 64219 |
14.04 |
| 2026-10-08 00:00 |
13:09:38.61 |
-21:57:37.8 |
HIP 64219 |
13.91 |
| 2026-10-08 12:00 |
13:09:50.38 |
-21:57:19.7 |
HIP 64219 |
14.30 |
| 2026-10-09 00:00 |
13:10:02.15 |
-21:57:02.2 |
HIP 64219 |
15.17 |
| 2026-10-09 12:00 |
13:10:13.91 |
-21:56:45.1 |
HIP 64219 |
16.46 |
| 2026-10-10 00:00 |
13:10:25.68 |
-21:56:28.5 |
HIP 64219 |
18.06 |
| 2026-10-10 12:00 |
13:10:37.44 |
-21:56:12.4 |
HIP 64219 |
19.91 |
| 2026-10-11 00:00 |
13:10:49.20 |
-21:55:56.7 |
HIP 64219 |
21.94 |