メタデータ
| 項目 |
値 |
| Designation |
C/2023 F3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-02-02T15:01:19.626240Z |
| Orbit solution date (soln_date, UTC) |
2026-08-07T12:42:13Z |
| Obs used |
1332 |
| 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) |
-1492.487526 |
| i (deg) |
145.963569 |
| Ω (om, deg) |
109.464730 |
| ω (w, deg) |
265.531862 |
| 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) |
| 2026-09-20 00:00 |
09:28:17.67 |
-03:20:17.5 |
HIP 46522 |
18.38 |
| 2026-09-20 12:00 |
09:28:23.81 |
-03:20:37.4 |
HIP 46522 |
17.34 |
| 2026-09-21 00:00 |
09:28:29.88 |
-03:20:57.6 |
HIP 46522 |
16.39 |
| 2026-09-21 12:00 |
09:28:35.87 |
-03:21:17.8 |
HIP 46522 |
15.57 |
| 2026-09-22 00:00 |
09:28:41.78 |
-03:21:38.2 |
HIP 46522 |
14.86 |
| 2026-09-22 12:00 |
09:28:47.62 |
-03:21:58.7 |
HIP 46522 |
14.30 |
| 2026-09-23 00:00 |
09:28:53.39 |
-03:22:19.3 |
HIP 46522 |
13.89 |
| 2026-09-23 12:00 |
09:28:59.07 |
-03:22:40.1 |
HIP 46522 |
13.63 |
| 2026-09-24 00:00 |
09:29:04.68 |
-03:23:00.9 |
HIP 46522 |
13.53 |
| 2026-09-24 12:00 |
09:29:10.21 |
-03:23:21.8 |
HIP 46522 |
13.59 |
| 2026-09-25 00:00 |
09:29:15.67 |
-03:23:42.8 |
HIP 46522 |
13.80 |
| 2026-09-25 12:00 |
09:29:21.04 |
-03:24:03.9 |
HIP 46522 |
14.15 |
| 2026-09-26 00:00 |
09:29:26.33 |
-03:24:25.1 |
HIP 46522 |
14.62 |
| 2026-09-26 12:00 |
09:29:31.54 |
-03:24:46.3 |
HIP 46522 |
15.20 |
| 2026-09-27 00:00 |
09:29:36.67 |
-03:25:07.6 |
HIP 46522 |
15.86 |
| 2026-09-27 12:00 |
09:29:41.71 |
-03:25:29.0 |
HIP 46522 |
16.60 |
| 2026-09-28 00:00 |
09:29:46.68 |
-03:25:50.4 |
HIP 46522 |
17.40 |
| 2026-09-28 12:00 |
09:29:51.55 |
-03:26:11.8 |
HIP 46522 |
18.25 |
| 2026-09-29 00:00 |
09:29:56.34 |
-03:26:33.3 |
HIP 46522 |
19.13 |
| 2026-09-29 12:00 |
09:30:01.05 |
-03:26:54.8 |
HIP 46522 |
20.04 |
| 2026-09-30 00:00 |
09:30:05.67 |
-03:27:16.4 |
HIP 46708 |
19.95 |
| 2026-09-30 12:00 |
09:30:10.20 |
-03:27:38.0 |
HIP 46708 |
19.07 |
| 2026-10-01 00:00 |
09:30:14.65 |
-03:27:59.6 |
HIP 46708 |
18.25 |
| 2026-10-01 12:00 |
09:30:19.00 |
-03:28:21.1 |
HIP 46708 |
17.49 |
| 2026-10-02 00:00 |
09:30:23.27 |
-03:28:42.7 |
HIP 46708 |
16.78 |
| 2026-10-02 12:00 |
09:30:27.44 |
-03:29:04.3 |
HIP 46708 |
16.15 |
| 2026-10-03 00:00 |
09:30:31.53 |
-03:29:25.9 |
HIP 46708 |
15.58 |
| 2026-10-03 12:00 |
09:30:35.52 |
-03:29:47.5 |
HIP 46708 |
15.09 |
| 2026-10-04 00:00 |
09:30:39.41 |
-03:30:09.0 |
HIP 46708 |
14.67 |
| 2026-10-04 12:00 |
09:30:43.22 |
-03:30:30.5 |
HIP 46708 |
14.32 |
| 2026-10-05 00:00 |
09:30:46.93 |
-03:30:51.9 |
HIP 46708 |
14.06 |
| 2026-10-05 12:00 |
09:30:50.54 |
-03:31:13.3 |
HIP 46708 |
13.87 |
| 2026-10-06 00:00 |
09:30:54.05 |
-03:31:34.7 |
HIP 46708 |
13.76 |
| 2026-10-06 12:00 |
09:30:57.47 |
-03:31:56.0 |
HIP 46708 |
13.73 |
| 2026-10-07 00:00 |
09:31:00.79 |
-03:32:17.2 |
HIP 46708 |
13.76 |
| 2026-10-07 12:00 |
09:31:04.01 |
-03:32:38.3 |
HIP 46708 |
13.85 |
| 2026-10-08 00:00 |
09:31:07.13 |
-03:32:59.3 |
HIP 46708 |
14.01 |
| 2026-10-08 12:00 |
09:31:10.15 |
-03:33:20.3 |
HIP 46756 |
13.76 |
| 2026-10-09 00:00 |
09:31:13.06 |
-03:33:41.1 |
HIP 46756 |
13.56 |
| 2026-10-09 12:00 |
09:31:15.88 |
-03:34:01.9 |
HIP 46756 |
13.42 |
| 2026-10-10 00:00 |
09:31:18.59 |
-03:34:22.5 |
HIP 46756 |
13.33 |
| 2026-10-10 12:00 |
09:31:21.19 |
-03:34:42.9 |
HIP 46799 |
13.20 |
| 2026-10-11 00:00 |
09:31:23.69 |
-03:35:03.3 |
HIP 46799 |
12.71 |