C/2022 O1 (ATLAS)
メタデータ
| 項目 |
値 |
| Designation |
C/2022 O1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-02-15T13:27:28.730880Z |
| Orbit solution date (soln_date, UTC) |
2023-12-21T03:13:05Z |
| Obs used |
189 |
| NEO |
- |
| M1 |
5.800 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-07-26T03:07:23.577600Z |
| Discovery magnitude (MPC) |
19.32 c |
| Discovery observatory (MPC) |
M22 · ATLAS South Africa, Sutherland |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-10-15.0000000 |
| e |
1.00485234 |
| q (au) |
7.430031 |
| a (au) |
-1531.226453 |
| i (deg) |
71.044322 |
| Ω (om, deg) |
49.910226 |
| ω (w, deg) |
268.885126 |
| M (ma, deg) |
0.003971 |
等級
散乱 + 全体線形
$$
M_a = (11.639 + 3.878\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.639 |
| n |
3.878 |
| gf |
0.997 |
| gb |
-0.934 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
02:46:48.87 |
-01:59:55.5 |
HIP 12812 |
32.31 |
| 2026-02-03 12:00 |
02:46:49.17 |
-01:58:14.9 |
HIP 12812 |
32.31 |
| 2026-02-04 00:00 |
02:46:49.55 |
-01:56:34.1 |
HIP 12812 |
32.42 |
| 2026-02-04 12:00 |
02:46:50.02 |
-01:54:53.1 |
HIP 12950 |
32.12 |
| 2026-02-05 00:00 |
02:46:50.58 |
-01:53:11.9 |
HIP 12950 |
30.46 |
| 2026-02-05 12:00 |
02:46:51.21 |
-01:51:30.5 |
HIP 12950 |
28.82 |
| 2026-02-06 00:00 |
02:46:51.94 |
-01:49:48.9 |
HIP 12950 |
27.18 |
| 2026-02-06 12:00 |
02:46:52.75 |
-01:48:07.2 |
HIP 12950 |
25.55 |
| 2026-02-07 00:00 |
02:46:53.64 |
-01:46:25.2 |
HIP 12950 |
23.93 |
| 2026-02-07 12:00 |
02:46:54.61 |
-01:44:43.1 |
HIP 12950 |
22.34 |
| 2026-02-08 00:00 |
02:46:55.67 |
-01:43:00.9 |
HIP 12950 |
20.76 |
| 2026-02-08 12:00 |
02:46:56.82 |
-01:41:18.4 |
HIP 12950 |
19.21 |
| 2026-02-09 00:00 |
02:46:58.04 |
-01:39:35.8 |
HIP 12950 |
17.70 |
| 2026-02-09 12:00 |
02:46:59.35 |
-01:37:53.0 |
HIP 12950 |
16.24 |
| 2026-02-10 00:00 |
02:47:00.75 |
-01:36:10.1 |
HIP 12950 |
14.85 |
| 2026-02-10 12:00 |
02:47:02.22 |
-01:34:27.0 |
HIP 12950 |
13.56 |
| 2026-02-11 00:00 |
02:47:03.78 |
-01:32:43.8 |
HIP 12950 |
12.39 |
| 2026-02-11 12:00 |
02:47:05.42 |
-01:31:00.4 |
HIP 12950 |
11.38 |
| 2026-02-12 00:00 |
02:47:07.14 |
-01:29:16.9 |
HIP 12950 |
10.60 |
| 2026-02-12 12:00 |
02:47:08.94 |
-01:27:33.2 |
HIP 12950 |
10.09 |
| 2026-02-13 00:00 |
02:47:10.83 |
-01:25:49.4 |
HIP 12950 |
9.90 |
| 2026-02-13 12:00 |
02:47:12.79 |
-01:24:05.5 |
HIP 12950 |
10.05 |
| 2026-02-14 00:00 |
02:47:14.84 |
-01:22:21.5 |
HIP 12950 |
10.53 |
| 2026-02-14 12:00 |
02:47:16.96 |
-01:20:37.3 |
HIP 12950 |
11.30 |
| 2026-02-15 00:00 |
02:47:19.17 |
-01:18:53.1 |
HIP 12950 |
12.32 |
| 2026-02-15 12:00 |
02:47:21.45 |
-01:17:08.7 |
HIP 12950 |
13.52 |
| 2026-02-16 00:00 |
02:47:23.81 |
-01:15:24.2 |
HIP 12950 |
14.87 |
| 2026-02-16 12:00 |
02:47:26.25 |
-01:13:39.6 |
HIP 12950 |
16.33 |
| 2026-02-17 00:00 |
02:47:28.77 |
-01:11:54.9 |
HIP 12950 |
17.89 |
| 2026-02-17 12:00 |
02:47:31.37 |
-01:10:10.1 |
HIP 12950 |
19.51 |
| 2026-02-18 00:00 |
02:47:34.05 |
-01:08:25.2 |
HIP 12950 |
21.18 |
| 2026-02-18 12:00 |
02:47:36.80 |
-01:06:40.3 |
HIP 12950 |
22.90 |
| 2026-02-19 00:00 |
02:47:39.63 |
-01:04:55.2 |
HIP 12950 |
24.66 |
| 2026-02-19 12:00 |
02:47:42.54 |
-01:03:10.1 |
HIP 12950 |
26.45 |
| 2026-02-20 00:00 |
02:47:45.52 |
-01:01:24.9 |
HIP 12995 |
27.30 |
| 2026-02-20 12:00 |
02:47:48.58 |
-00:59:39.6 |
HIP 12995 |
25.98 |
| 2026-02-21 00:00 |
02:47:51.71 |
-00:57:54.3 |
HIP 12995 |
24.74 |
| 2026-02-21 12:00 |
02:47:54.92 |
-00:56:08.8 |
HIP 12995 |
23.61 |
| 2026-02-22 00:00 |
02:47:58.20 |
-00:54:23.4 |
HIP 12995 |
22.59 |
| 2026-02-22 12:00 |
02:48:01.56 |
-00:52:37.9 |
HIP 12995 |
21.71 |
| 2026-02-23 00:00 |
02:48:04.99 |
-00:50:52.3 |
HIP 12995 |
20.99 |
| 2026-02-23 12:00 |
02:48:08.49 |
-00:49:06.7 |
HIP 12995 |
20.45 |
| 2026-02-24 00:00 |
02:48:12.06 |
-00:47:21.1 |
HIP 12995 |
20.09 |