メタデータ
| 項目 |
値 |
| Designation |
C/2023 F3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-02-02T15:01:19.479360Z |
| Orbit solution date (soln_date, UTC) |
2026-06-09T11:12:26Z |
| Obs used |
1330 |
| NEO |
- |
| M1 |
9.800 |
| K1 |
5.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-03-28T08:28:27.840000Z |
| Discovery magnitude (MPC) |
18.85 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) |
2025-05-05.0000000 |
| e |
1.00347794 |
| q (au) |
5.190775 |
| a (au) |
-1492.487364 |
| i (deg) |
145.963569 |
| Ω (om, deg) |
109.464730 |
| ω (w, deg) |
265.531861 |
| M (ma, deg) |
0.001562 |
等級
散乱 + 全体線形
$$
M_a = (10.945 + 3.027\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.945 |
| n |
3.027 |
| gf |
0.957 |
| gb |
-0.729 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
09:13:13.23 |
-03:19:21.0 |
HIP 45203 |
19.10 |
| 2026-07-29 12:00 |
09:13:22.66 |
-03:18:51.5 |
HIP 45203 |
19.78 |
| 2026-07-30 00:00 |
09:13:32.10 |
-03:18:22.8 |
HIP 45203 |
20.72 |
| 2026-07-30 12:00 |
09:13:41.55 |
-03:17:54.8 |
HIP 45203 |
21.90 |
| 2026-07-31 00:00 |
09:13:51.01 |
-03:17:27.6 |
HIP 45203 |
23.28 |
| 2026-07-31 12:00 |
09:14:00.47 |
-03:17:01.1 |
HIP 45203 |
24.82 |
| 2026-08-01 00:00 |
09:14:09.94 |
-03:16:35.4 |
HIP 45203 |
26.50 |
| 2026-08-01 12:00 |
09:14:19.42 |
-03:16:10.5 |
HIP 45203 |
28.30 |
| 2026-08-02 00:00 |
09:14:28.91 |
-03:15:46.2 |
HIP 45203 |
30.18 |
| 2026-08-02 12:00 |
09:14:38.39 |
-03:15:22.7 |
HIP 45203 |
32.14 |
| 2026-08-03 00:00 |
09:14:47.89 |
-03:15:00.0 |
HIP 45398 |
32.25 |
| 2026-08-03 12:00 |
09:14:57.38 |
-03:14:37.9 |
HIP 45398 |
32.38 |
| 2026-08-04 00:00 |
09:15:06.88 |
-03:14:16.5 |
HIP 45398 |
32.67 |
| 2026-08-04 12:00 |
09:15:16.38 |
-03:13:55.9 |
HIP 45398 |
33.12 |
| 2026-08-05 00:00 |
09:15:25.88 |
-03:13:36.0 |
HIP 45398 |
33.73 |
| 2026-08-05 12:00 |
09:15:35.38 |
-03:13:16.7 |
HIP 45398 |
34.48 |
| 2026-08-06 00:00 |
09:15:44.88 |
-03:12:58.2 |
HIP 45621 |
34.14 |
| 2026-08-06 12:00 |
09:15:54.38 |
-03:12:40.3 |
HIP 45621 |
31.99 |
| 2026-08-07 00:00 |
09:16:03.88 |
-03:12:23.1 |
HIP 45621 |
29.86 |
| 2026-08-07 12:00 |
09:16:13.37 |
-03:12:06.7 |
HIP 45621 |
27.78 |
| 2026-08-08 00:00 |
09:16:22.86 |
-03:11:50.8 |
HIP 45621 |
25.74 |
| 2026-08-08 12:00 |
09:16:32.35 |
-03:11:35.7 |
HIP 45621 |
23.76 |
| 2026-08-09 00:00 |
09:16:41.83 |
-03:11:21.2 |
HIP 45621 |
21.86 |
| 2026-08-09 12:00 |
09:16:51.31 |
-03:11:07.4 |
HIP 45621 |
20.05 |
| 2026-08-10 00:00 |
09:17:00.78 |
-03:10:54.2 |
HIP 45621 |
18.37 |
| 2026-08-10 12:00 |
09:17:10.24 |
-03:10:41.6 |
HIP 45621 |
16.85 |
| 2026-08-11 00:00 |
09:17:19.69 |
-03:10:29.7 |
HIP 45621 |
15.54 |
| 2026-08-11 12:00 |
09:17:29.13 |
-03:10:18.5 |
HIP 45621 |
14.48 |
| 2026-08-12 00:00 |
09:17:38.56 |
-03:10:07.8 |
HIP 45621 |
13.75 |
| 2026-08-12 12:00 |
09:17:47.98 |
-03:09:57.8 |
HIP 45621 |
13.39 |
| 2026-08-13 00:00 |
09:17:57.39 |
-03:09:48.4 |
HIP 45689 |
13.37 |
| 2026-08-13 12:00 |
09:18:06.78 |
-03:09:39.6 |
HIP 45689 |
11.02 |
| 2026-08-14 00:00 |
09:18:16.17 |
-03:09:31.4 |
HIP 45689 |
8.68 |
| 2026-08-14 12:00 |
09:18:25.53 |
-03:09:23.8 |
HIP 45689 |
6.34 |
| 2026-08-15 00:00 |
09:18:34.88 |
-03:09:16.8 |
HIP 45689 |
4.00 |
| 2026-08-15 12:00 |
09:18:44.22 |
-03:09:10.4 |
HIP 45689 |
1.69 |
| 2026-08-16 00:00 |
09:18:53.54 |
-03:09:04.6 |
HIP 45689 |
0.76 |
| 2026-08-16 12:00 |
09:19:02.84 |
-03:08:59.3 |
HIP 45689 |
3.02 |
| 2026-08-17 00:00 |
09:19:12.12 |
-03:08:54.6 |
HIP 45689 |
5.33 |
| 2026-08-17 12:00 |
09:19:21.38 |
-03:08:50.4 |
HIP 45689 |
7.64 |
| 2026-08-18 00:00 |
09:19:30.62 |
-03:08:46.8 |
HIP 45689 |
9.94 |
| 2026-08-18 12:00 |
09:19:39.84 |
-03:08:43.8 |
HIP 45689 |
12.25 |
| 2026-08-19 00:00 |
09:19:49.03 |
-03:08:41.3 |
HIP 45689 |
14.54 |