メタデータ
| 項目 |
値 |
| Designation |
C/2022 F1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-08-05T05:09:46.437120Z |
| Orbit solution date (soln_date, UTC) |
2024-08-11T00:12:15Z |
| Obs used |
133 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
10.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-03-30T07:09:54.633600Z |
| Discovery magnitude (MPC) |
18.67 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) |
2023-04-07.0000000 |
| e |
0.99936046 |
| q (au) |
5.974611 |
| a (au) |
9342.022012 |
| i (deg) |
57.973045 |
| Ω (om, deg) |
350.654799 |
| ω (w, deg) |
278.276791 |
| M (ma, deg) |
0.000267 |
等級
散乱 + 全体線形
$$
M_a = (2.149 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.149 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.502 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
23:30:39.00 |
-02:20:25.7 |
HIP 115945 |
37.55 |
| 2026-03-26 12:00 |
23:30:48.67 |
-02:18:36.8 |
HIP 115945 |
37.23 |
| 2026-03-27 00:00 |
23:30:58.31 |
-02:16:48.0 |
HIP 115945 |
37.16 |
| 2026-03-27 12:00 |
23:31:07.94 |
-02:14:59.3 |
HIP 115945 |
37.33 |
| 2026-03-28 00:00 |
23:31:17.54 |
-02:13:10.8 |
HIP 116290 |
36.00 |
| 2026-03-28 12:00 |
23:31:27.12 |
-02:11:22.3 |
HIP 116290 |
33.74 |
| 2026-03-29 00:00 |
23:31:36.67 |
-02:09:34.0 |
HIP 116290 |
31.60 |
| 2026-03-29 12:00 |
23:31:46.21 |
-02:07:45.8 |
HIP 116290 |
29.62 |
| 2026-03-30 00:00 |
23:31:55.72 |
-02:05:57.7 |
HIP 116290 |
27.83 |
| 2026-03-30 12:00 |
23:32:05.20 |
-02:04:09.8 |
HIP 116290 |
26.25 |
| 2026-03-31 00:00 |
23:32:14.67 |
-02:02:22.0 |
HIP 116290 |
24.94 |
| 2026-03-31 12:00 |
23:32:24.10 |
-02:00:34.3 |
HIP 116290 |
23.93 |
| 2026-04-01 00:00 |
23:32:33.52 |
-01:58:46.8 |
HIP 116290 |
23.26 |
| 2026-04-01 12:00 |
23:32:42.90 |
-01:56:59.4 |
HIP 116290 |
22.96 |
| 2026-04-02 00:00 |
23:32:52.26 |
-01:55:12.2 |
HIP 116290 |
23.03 |
| 2026-04-02 12:00 |
23:33:01.59 |
-01:53:25.0 |
HIP 116290 |
23.48 |
| 2026-04-03 00:00 |
23:33:10.90 |
-01:51:38.1 |
HIP 116290 |
24.27 |
| 2026-04-03 12:00 |
23:33:20.18 |
-01:49:51.3 |
HIP 116290 |
25.38 |
| 2026-04-04 00:00 |
23:33:29.43 |
-01:48:04.6 |
HIP 116359 |
24.98 |
| 2026-04-04 12:00 |
23:33:38.65 |
-01:46:18.1 |
HIP 116359 |
22.10 |
| 2026-04-05 00:00 |
23:33:47.84 |
-01:44:31.7 |
HIP 116359 |
19.24 |
| 2026-04-05 12:00 |
23:33:57.01 |
-01:42:45.5 |
HIP 116359 |
16.39 |
| 2026-04-06 00:00 |
23:34:06.14 |
-01:40:59.5 |
HIP 116359 |
13.58 |
| 2026-04-06 12:00 |
23:34:15.24 |
-01:39:13.6 |
HIP 116359 |
10.80 |
| 2026-04-07 00:00 |
23:34:24.31 |
-01:37:27.9 |
HIP 116359 |
8.11 |
| 2026-04-07 12:00 |
23:34:33.36 |
-01:35:42.3 |
HIP 116359 |
5.60 |
| 2026-04-08 00:00 |
23:34:42.37 |
-01:33:57.0 |
HIP 116359 |
3.65 |
| 2026-04-08 12:00 |
23:34:51.34 |
-01:32:11.7 |
HIP 116359 |
3.41 |
| 2026-04-09 00:00 |
23:35:00.29 |
-01:30:26.7 |
HIP 116359 |
5.10 |
| 2026-04-09 12:00 |
23:35:09.20 |
-01:28:41.8 |
HIP 116359 |
7.51 |
| 2026-04-10 00:00 |
23:35:18.08 |
-01:26:57.2 |
HIP 116359 |
10.13 |
| 2026-04-10 12:00 |
23:35:26.92 |
-01:25:12.7 |
HIP 116359 |
12.83 |
| 2026-04-11 00:00 |
23:35:35.73 |
-01:23:28.4 |
HIP 116359 |
15.56 |
| 2026-04-11 12:00 |
23:35:44.50 |
-01:21:44.2 |
HIP 116359 |
18.31 |
| 2026-04-12 00:00 |
23:35:53.24 |
-01:20:00.3 |
HIP 116359 |
21.05 |
| 2026-04-12 12:00 |
23:36:01.95 |
-01:18:16.5 |
HIP 116559 |
22.85 |
| 2026-04-13 00:00 |
23:36:10.61 |
-01:16:33.0 |
HIP 116559 |
22.19 |
| 2026-04-13 12:00 |
23:36:19.24 |
-01:14:49.6 |
HIP 116559 |
21.88 |
| 2026-04-14 00:00 |
23:36:27.83 |
-01:13:06.5 |
HIP 116559 |
21.91 |
| 2026-04-14 12:00 |
23:36:36.39 |
-01:11:23.5 |
HIP 116559 |
22.29 |
| 2026-04-15 00:00 |
23:36:44.90 |
-01:09:40.8 |
HIP 116629 |
22.90 |
| 2026-04-15 12:00 |
23:36:53.38 |
-01:07:58.3 |
HIP 116629 |
21.94 |
| 2026-04-16 00:00 |
23:37:01.81 |
-01:06:15.9 |
HIP 116629 |
21.29 |