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 |
1.000 |
| 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) |
| 2026-09-20 00:00 |
03:21:55.48 |
+05:53:33.2 |
HIP 15670 |
11.61 |
| 2026-09-20 12:00 |
03:21:49.96 |
+05:53:31.5 |
HIP 15670 |
11.60 |
| 2026-09-21 00:00 |
03:21:44.36 |
+05:53:29.6 |
HIP 15670 |
11.75 |
| 2026-09-21 12:00 |
03:21:38.69 |
+05:53:27.7 |
HIP 15670 |
12.07 |
| 2026-09-22 00:00 |
03:21:32.95 |
+05:53:25.6 |
HIP 15670 |
12.54 |
| 2026-09-22 12:00 |
03:21:27.14 |
+05:53:23.5 |
HIP 15670 |
13.16 |
| 2026-09-23 00:00 |
03:21:21.26 |
+05:53:21.2 |
HIP 15670 |
13.91 |
| 2026-09-23 12:00 |
03:21:15.31 |
+05:53:18.9 |
HIP 15670 |
14.78 |
| 2026-09-24 00:00 |
03:21:09.29 |
+05:53:16.5 |
HIP 15670 |
15.75 |
| 2026-09-24 12:00 |
03:21:03.20 |
+05:53:14.0 |
HIP 15670 |
16.81 |
| 2026-09-25 00:00 |
03:20:57.04 |
+05:53:11.4 |
HIP 15670 |
17.95 |
| 2026-09-25 12:00 |
03:20:50.81 |
+05:53:08.7 |
HIP 15670 |
19.16 |
| 2026-09-26 00:00 |
03:20:44.52 |
+05:53:06.0 |
HIP 15670 |
20.43 |
| 2026-09-26 12:00 |
03:20:38.16 |
+05:53:03.2 |
HIP 15542 |
21.02 |
| 2026-09-27 00:00 |
03:20:31.73 |
+05:53:00.3 |
HIP 15542 |
20.69 |
| 2026-09-27 12:00 |
03:20:25.23 |
+05:52:57.3 |
HIP 15542 |
20.48 |
| 2026-09-28 00:00 |
03:20:18.67 |
+05:52:54.3 |
HIP 15542 |
20.40 |
| 2026-09-28 12:00 |
03:20:12.04 |
+05:52:51.3 |
HIP 15542 |
20.45 |
| 2026-09-29 00:00 |
03:20:05.35 |
+05:52:48.1 |
HIP 15542 |
20.64 |
| 2026-09-29 12:00 |
03:19:58.59 |
+05:52:45.0 |
HIP 15542 |
20.96 |
| 2026-09-30 00:00 |
03:19:51.76 |
+05:52:41.7 |
HIP 15397 |
20.57 |
| 2026-09-30 12:00 |
03:19:44.88 |
+05:52:38.5 |
HIP 15397 |
18.88 |
| 2026-10-01 00:00 |
03:19:37.93 |
+05:52:35.1 |
HIP 15397 |
17.18 |
| 2026-10-01 12:00 |
03:19:30.91 |
+05:52:31.8 |
HIP 15397 |
15.46 |
| 2026-10-02 00:00 |
03:19:23.84 |
+05:52:28.4 |
HIP 15397 |
13.75 |
| 2026-10-02 12:00 |
03:19:16.70 |
+05:52:25.0 |
HIP 15397 |
12.03 |
| 2026-10-03 00:00 |
03:19:09.50 |
+05:52:21.5 |
HIP 15397 |
10.31 |
| 2026-10-03 12:00 |
03:19:02.24 |
+05:52:18.0 |
HIP 15397 |
8.61 |
| 2026-10-04 00:00 |
03:18:54.91 |
+05:52:14.5 |
HIP 15397 |
6.96 |
| 2026-10-04 12:00 |
03:18:47.53 |
+05:52:11.0 |
HIP 15397 |
5.39 |
| 2026-10-05 00:00 |
03:18:40.09 |
+05:52:07.5 |
HIP 15397 |
4.06 |
| 2026-10-05 12:00 |
03:18:32.59 |
+05:52:03.9 |
HIP 15397 |
3.27 |
| 2026-10-06 00:00 |
03:18:25.03 |
+05:52:00.3 |
HIP 15397 |
3.45 |
| 2026-10-06 12:00 |
03:18:17.42 |
+05:51:56.8 |
HIP 15397 |
4.51 |
| 2026-10-07 00:00 |
03:18:09.74 |
+05:51:53.2 |
HIP 15397 |
6.00 |
| 2026-10-07 12:00 |
03:18:02.01 |
+05:51:49.7 |
HIP 15397 |
7.70 |
| 2026-10-08 00:00 |
03:17:54.23 |
+05:51:46.1 |
HIP 15397 |
9.49 |
| 2026-10-08 12:00 |
03:17:46.39 |
+05:51:42.6 |
HIP 15299 |
8.84 |
| 2026-10-09 00:00 |
03:17:38.49 |
+05:51:39.0 |
HIP 15299 |
7.60 |
| 2026-10-09 12:00 |
03:17:30.55 |
+05:51:35.5 |
HIP 15299 |
6.72 |
| 2026-10-10 00:00 |
03:17:22.54 |
+05:51:32.0 |
HIP 15299 |
6.35 |
| 2026-10-10 12:00 |
03:17:14.49 |
+05:51:28.6 |
HIP 15299 |
6.60 |
| 2026-10-11 00:00 |
03:17:06.38 |
+05:51:25.2 |
HIP 15299 |
7.40 |