メタデータ
| 項目 |
値 |
| Designation |
C/2022 Q2 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-01-31T14:05:21.716160Z |
| Orbit solution date (soln_date, UTC) |
2023-08-06T18:13:02Z |
| Obs used |
591 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
9.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2022-08-27T14:05:17.059200Z |
| Discovery magnitude (MPC) |
19.06 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-11-02.0000000 |
| e |
0.94987994 |
| q (au) |
1.644140 |
| a (au) |
32.804037 |
| i (deg) |
151.486615 |
| Ω (om, deg) |
352.943256 |
| ω (w, deg) |
44.060185 |
| M (ma, deg) |
359.524797 |
等級
散乱 + 全体線形
$$
M_a = (13.015 + 3.982\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.015 |
| n |
3.982 |
| gf |
1.000 |
| gb |
-0.839 |
| k |
0.998 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2022-08-27 |
2022-12-21 |
+0.4118 |
-0.203 |
| 2023-04-03 |
2023-07-16 |
-8.5392 |
+4.736 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
11:08:38.62 |
+04:47:29.1 |
HIP 54481 |
12.20 |
| 2026-06-01 12:00 |
11:08:35.98 |
+04:47:33.0 |
HIP 54481 |
12.26 |
| 2026-06-02 00:00 |
11:08:33.43 |
+04:47:36.3 |
HIP 54481 |
12.35 |
| 2026-06-02 12:00 |
11:08:30.97 |
+04:47:39.1 |
HIP 54481 |
12.47 |
| 2026-06-03 00:00 |
11:08:28.61 |
+04:47:41.4 |
HIP 54481 |
12.63 |
| 2026-06-03 12:00 |
11:08:26.33 |
+04:47:43.1 |
HIP 54481 |
12.81 |
| 2026-06-04 00:00 |
11:08:24.15 |
+04:47:44.3 |
HIP 54481 |
13.01 |
| 2026-06-04 12:00 |
11:08:22.06 |
+04:47:44.9 |
HIP 54481 |
13.23 |
| 2026-06-05 00:00 |
11:08:20.05 |
+04:47:45.0 |
HIP 54481 |
13.46 |
| 2026-06-05 12:00 |
11:08:18.14 |
+04:47:44.5 |
HIP 54481 |
13.70 |
| 2026-06-06 00:00 |
11:08:16.32 |
+04:47:43.5 |
HIP 54481 |
13.95 |
| 2026-06-06 12:00 |
11:08:14.59 |
+04:47:42.0 |
HIP 54481 |
14.21 |
| 2026-06-07 00:00 |
11:08:12.95 |
+04:47:39.9 |
HIP 54481 |
14.46 |
| 2026-06-07 12:00 |
11:08:11.40 |
+04:47:37.3 |
HIP 54481 |
14.72 |
| 2026-06-08 00:00 |
11:08:09.94 |
+04:47:34.2 |
HIP 54481 |
14.98 |
| 2026-06-08 12:00 |
11:08:08.57 |
+04:47:30.5 |
HIP 54481 |
15.24 |
| 2026-06-09 00:00 |
11:08:07.28 |
+04:47:26.3 |
HIP 54481 |
15.49 |
| 2026-06-09 12:00 |
11:08:06.09 |
+04:47:21.6 |
HIP 54481 |
15.74 |
| 2026-06-10 00:00 |
11:08:04.98 |
+04:47:16.3 |
HIP 54481 |
15.98 |
| 2026-06-10 12:00 |
11:08:03.96 |
+04:47:10.5 |
HIP 54481 |
16.22 |
| 2026-06-11 00:00 |
11:08:03.03 |
+04:47:04.2 |
HIP 54481 |
16.45 |
| 2026-06-11 12:00 |
11:08:02.19 |
+04:46:57.3 |
HIP 54481 |
16.68 |
| 2026-06-12 00:00 |
11:08:01.43 |
+04:46:50.0 |
HIP 54481 |
16.89 |
| 2026-06-12 12:00 |
11:08:00.76 |
+04:46:42.1 |
HIP 54481 |
17.10 |
| 2026-06-13 00:00 |
11:08:00.17 |
+04:46:33.7 |
HIP 54481 |
17.30 |
| 2026-06-13 12:00 |
11:07:59.68 |
+04:46:24.8 |
HIP 54481 |
17.50 |
| 2026-06-14 00:00 |
11:07:59.27 |
+04:46:15.3 |
HIP 54481 |
17.68 |
| 2026-06-14 12:00 |
11:07:58.94 |
+04:46:05.4 |
HIP 54481 |
17.86 |
| 2026-06-15 00:00 |
11:07:58.70 |
+04:45:54.9 |
HIP 54481 |
18.03 |
| 2026-06-15 12:00 |
11:07:58.54 |
+04:45:43.9 |
HIP 54481 |
18.19 |
| 2026-06-16 00:00 |
11:07:58.47 |
+04:45:32.4 |
HIP 54481 |
18.35 |
| 2026-06-16 12:00 |
11:07:58.48 |
+04:45:20.4 |
HIP 54481 |
18.50 |
| 2026-06-17 00:00 |
11:07:58.58 |
+04:45:07.9 |
HIP 54440 |
18.43 |
| 2026-06-17 12:00 |
11:07:58.76 |
+04:44:54.9 |
HIP 54440 |
18.21 |
| 2026-06-18 00:00 |
11:07:59.02 |
+04:44:41.4 |
HIP 54440 |
17.98 |
| 2026-06-18 12:00 |
11:07:59.36 |
+04:44:27.5 |
HIP 54440 |
17.73 |
| 2026-06-19 00:00 |
11:07:59.79 |
+04:44:13.0 |
HIP 54440 |
17.47 |
| 2026-06-19 12:00 |
11:08:00.29 |
+04:43:58.0 |
HIP 54440 |
17.19 |
| 2026-06-20 00:00 |
11:08:00.88 |
+04:43:42.5 |
HIP 54440 |
16.90 |
| 2026-06-20 12:00 |
11:08:01.55 |
+04:43:26.6 |
HIP 54440 |
16.60 |
| 2026-06-21 00:00 |
11:08:02.29 |
+04:43:10.2 |
HIP 54440 |
16.29 |
| 2026-06-21 12:00 |
11:08:03.12 |
+04:42:53.3 |
HIP 54440 |
15.96 |
| 2026-06-22 00:00 |
11:08:04.03 |
+04:42:35.9 |
HIP 54440 |
15.62 |