メタデータ
| 項目 |
値 |
| Designation |
C/2023 F3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-02-02T15:00:44.539200Z |
| Orbit solution date (soln_date, UTC) |
2026-05-08T13:42:12Z |
| Obs used |
1289 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
5.250 |
| PC |
- |
| 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) |
2025-04-22.0000000 |
| e |
1.00350827 |
| q (au) |
5.190775 |
| a (au) |
-1479.581676 |
| i (deg) |
145.963575 |
| Ω (om, deg) |
109.464616 |
| ω (w, deg) |
265.531645 |
| M (ma, deg) |
0.001357 |
等級
散乱 + 全体線形
$$
M_a = (11.600 + 2.900\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.600 |
| n |
2.900 |
| gf |
0.984 |
| gb |
-0.770 |
| k |
0.800 |
| δ90 |
9.929 |
| 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 |
09:00:18.58 |
-08:13:22.8 |
HIP 44305 |
24.01 |
| 2026-05-12 12:00 |
09:00:15.05 |
-08:09:47.1 |
HIP 44305 |
22.11 |
| 2026-05-13 00:00 |
09:00:11.70 |
-08:06:12.9 |
HIP 44305 |
20.69 |
| 2026-05-13 12:00 |
09:00:08.51 |
-08:02:40.2 |
HIP 44305 |
19.82 |
| 2026-05-14 00:00 |
09:00:05.49 |
-07:59:09.0 |
HIP 44305 |
19.56 |
| 2026-05-14 12:00 |
09:00:02.63 |
-07:55:39.2 |
HIP 44305 |
19.92 |
| 2026-05-15 00:00 |
08:59:59.93 |
-07:52:11.0 |
HIP 44305 |
20.85 |
| 2026-05-15 12:00 |
08:59:57.40 |
-07:48:44.2 |
HIP 44305 |
22.26 |
| 2026-05-16 00:00 |
08:59:55.02 |
-07:45:18.9 |
HIP 44305 |
24.05 |
| 2026-05-16 12:00 |
08:59:52.81 |
-07:41:55.2 |
HIP 44305 |
26.13 |
| 2026-05-17 00:00 |
08:59:50.75 |
-07:38:32.9 |
HIP 44305 |
28.44 |
| 2026-05-17 12:00 |
08:59:48.85 |
-07:35:12.1 |
HIP 44305 |
30.90 |
| 2026-05-18 00:00 |
08:59:47.11 |
-07:31:52.8 |
HIP 44305 |
33.48 |
| 2026-05-18 12:00 |
08:59:45.52 |
-07:28:35.0 |
HIP 43994 |
33.47 |
| 2026-05-19 00:00 |
08:59:44.08 |
-07:25:18.6 |
HIP 43994 |
32.89 |
| 2026-05-19 12:00 |
08:59:42.80 |
-07:22:03.8 |
HIP 43994 |
32.67 |
| 2026-05-20 00:00 |
08:59:41.67 |
-07:18:50.4 |
HIP 43994 |
32.81 |
| 2026-05-20 12:00 |
08:59:40.69 |
-07:15:38.6 |
HIP 44036 |
31.09 |
| 2026-05-21 00:00 |
08:59:39.85 |
-07:12:28.2 |
HIP 44036 |
29.07 |
| 2026-05-21 12:00 |
08:59:39.16 |
-07:09:19.3 |
HIP 44036 |
27.32 |
| 2026-05-22 00:00 |
08:59:38.62 |
-07:06:11.9 |
HIP 44036 |
25.87 |
| 2026-05-22 12:00 |
08:59:38.22 |
-07:03:05.9 |
HIP 44036 |
24.78 |
| 2026-05-23 00:00 |
08:59:37.97 |
-07:00:01.4 |
HIP 44036 |
24.09 |
| 2026-05-23 12:00 |
08:59:37.85 |
-06:56:58.4 |
HIP 44036 |
23.80 |
| 2026-05-24 00:00 |
08:59:37.88 |
-06:53:56.9 |
HIP 44036 |
23.94 |
| 2026-05-24 12:00 |
08:59:38.05 |
-06:50:56.8 |
HIP 44036 |
24.49 |
| 2026-05-25 00:00 |
08:59:38.35 |
-06:47:58.2 |
HIP 44036 |
25.40 |
| 2026-05-25 12:00 |
08:59:38.80 |
-06:45:01.0 |
HIP 44111 |
23.08 |
| 2026-05-26 00:00 |
08:59:39.37 |
-06:42:05.3 |
HIP 44111 |
20.46 |
| 2026-05-26 12:00 |
08:59:40.08 |
-06:39:11.0 |
HIP 44111 |
17.99 |
| 2026-05-27 00:00 |
08:59:40.93 |
-06:36:18.2 |
HIP 44111 |
15.70 |
| 2026-05-27 12:00 |
08:59:41.91 |
-06:33:26.8 |
HIP 44111 |
13.69 |
| 2026-05-28 00:00 |
08:59:43.01 |
-06:30:36.9 |
HIP 44111 |
12.06 |
| 2026-05-28 12:00 |
08:59:44.25 |
-06:27:48.4 |
HIP 44111 |
10.99 |
| 2026-05-29 00:00 |
08:59:45.62 |
-06:25:01.3 |
HIP 44111 |
10.61 |
| 2026-05-29 12:00 |
08:59:47.11 |
-06:22:15.6 |
HIP 44111 |
11.00 |
| 2026-05-30 00:00 |
08:59:48.73 |
-06:19:31.4 |
HIP 44111 |
12.05 |
| 2026-05-30 12:00 |
08:59:50.48 |
-06:16:48.6 |
HIP 44111 |
13.61 |
| 2026-05-31 00:00 |
08:59:52.34 |
-06:14:07.1 |
HIP 44111 |
15.51 |
| 2026-05-31 12:00 |
08:59:54.34 |
-06:11:27.1 |
HIP 44273 |
15.86 |
| 2026-06-01 00:00 |
08:59:56.45 |
-06:08:48.5 |
HIP 44273 |
16.38 |
| 2026-06-01 12:00 |
08:59:58.68 |
-06:06:11.3 |
HIP 44273 |
17.27 |
| 2026-06-02 00:00 |
09:00:01.04 |
-06:03:35.5 |
HIP 44119 |
18.46 |