メタデータ
| 項目 |
値 |
| Designation |
C/2022 QE78 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-09-10T14:55:13.056960Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:18Z |
| Obs used |
3558 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
7.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-11-03.0000000 |
| e |
1.00434013 |
| q (au) |
5.477727 |
| a (au) |
-1262.111628 |
| i (deg) |
36.567242 |
| Ω (om, deg) |
119.917374 |
| ω (w, deg) |
0.454850 |
| M (ma, deg) |
-0.006850 |
等級
散乱 + 全体線形
$$
M_a = (6.590 + 2.265\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.590 |
| n |
2.265 |
| gf |
1.000 |
| gb |
-0.956 |
| 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
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) |
| 2026-03-26 00:00 |
09:01:32.42 |
+31:37:46.8 |
HIP 44401 |
21.75 |
| 2026-03-26 12:00 |
09:01:31.33 |
+31:38:44.6 |
HIP 44401 |
22.61 |
| 2026-03-27 00:00 |
09:01:30.42 |
+31:39:41.1 |
HIP 44401 |
23.45 |
| 2026-03-27 12:00 |
09:01:29.69 |
+31:40:36.3 |
HIP 44401 |
24.25 |
| 2026-03-28 00:00 |
09:01:29.15 |
+31:41:30.3 |
HIP 44401 |
25.02 |
| 2026-03-28 12:00 |
09:01:28.79 |
+31:42:23.0 |
HIP 44401 |
25.76 |
| 2026-03-29 00:00 |
09:01:28.61 |
+31:43:14.4 |
HIP 44199 |
25.38 |
| 2026-03-29 12:00 |
09:01:28.62 |
+31:44:04.6 |
HIP 44199 |
24.74 |
| 2026-03-30 00:00 |
09:01:28.81 |
+31:44:53.5 |
HIP 44199 |
24.16 |
| 2026-03-30 12:00 |
09:01:29.19 |
+31:45:41.2 |
HIP 44199 |
23.63 |
| 2026-03-31 00:00 |
09:01:29.75 |
+31:46:27.7 |
HIP 44199 |
23.16 |
| 2026-03-31 12:00 |
09:01:30.49 |
+31:47:13.0 |
HIP 44199 |
22.74 |
| 2026-04-01 00:00 |
09:01:31.42 |
+31:47:57.0 |
HIP 44199 |
22.39 |
| 2026-04-01 12:00 |
09:01:32.54 |
+31:48:39.8 |
HIP 44199 |
22.11 |
| 2026-04-02 00:00 |
09:01:33.83 |
+31:49:21.4 |
HIP 44199 |
21.89 |
| 2026-04-02 12:00 |
09:01:35.32 |
+31:50:01.9 |
HIP 44199 |
21.73 |
| 2026-04-03 00:00 |
09:01:36.99 |
+31:50:41.1 |
HIP 44199 |
21.65 |
| 2026-04-03 12:00 |
09:01:38.84 |
+31:51:19.1 |
HIP 44199 |
21.63 |
| 2026-04-04 00:00 |
09:01:40.88 |
+31:51:56.0 |
HIP 44199 |
21.68 |
| 2026-04-04 12:00 |
09:01:43.10 |
+31:52:31.7 |
HIP 44199 |
21.80 |
| 2026-04-05 00:00 |
09:01:45.51 |
+31:53:06.2 |
HIP 44199 |
21.99 |
| 2026-04-05 12:00 |
09:01:48.11 |
+31:53:39.6 |
HIP 44307 |
22.07 |
| 2026-04-06 00:00 |
09:01:50.88 |
+31:54:11.8 |
HIP 44307 |
21.69 |
| 2026-04-06 12:00 |
09:01:53.85 |
+31:54:42.9 |
HIP 44307 |
21.37 |
| 2026-04-07 00:00 |
09:01:57.00 |
+31:55:12.8 |
HIP 44307 |
21.10 |
| 2026-04-07 12:00 |
09:02:00.33 |
+31:55:41.7 |
HIP 44307 |
20.90 |
| 2026-04-08 00:00 |
09:02:03.85 |
+31:56:09.3 |
HIP 44307 |
20.76 |
| 2026-04-08 12:00 |
09:02:07.55 |
+31:56:35.9 |
HIP 44307 |
20.70 |
| 2026-04-09 00:00 |
09:02:11.44 |
+31:57:01.3 |
HIP 44307 |
20.70 |
| 2026-04-09 12:00 |
09:02:15.51 |
+31:57:25.7 |
HIP 44307 |
20.79 |
| 2026-04-10 00:00 |
09:02:19.77 |
+31:57:48.9 |
HIP 44307 |
20.95 |
| 2026-04-10 12:00 |
09:02:24.21 |
+31:58:11.0 |
HIP 44307 |
21.20 |
| 2026-04-11 00:00 |
09:02:28.84 |
+31:58:32.1 |
HIP 44307 |
21.53 |
| 2026-04-11 12:00 |
09:02:33.65 |
+31:58:52.1 |
HIP 44307 |
21.94 |
| 2026-04-12 00:00 |
09:02:38.64 |
+31:59:11.0 |
HIP 44307 |
22.44 |
| 2026-04-12 12:00 |
09:02:43.82 |
+31:59:28.8 |
HIP 44307 |
23.02 |
| 2026-04-13 00:00 |
09:02:49.18 |
+31:59:45.6 |
HIP 44307 |
23.68 |
| 2026-04-13 12:00 |
09:02:54.73 |
+32:00:01.3 |
HIP 44307 |
24.42 |
| 2026-04-14 00:00 |
09:03:00.46 |
+32:00:15.9 |
HIP 44307 |
25.24 |
| 2026-04-14 12:00 |
09:03:06.37 |
+32:00:29.5 |
HIP 44307 |
26.13 |
| 2026-04-15 00:00 |
09:03:12.46 |
+32:00:42.1 |
HIP 44307 |
27.10 |
| 2026-04-15 12:00 |
09:03:18.74 |
+32:00:53.7 |
HIP 44307 |
28.13 |
| 2026-04-16 00:00 |
09:03:25.19 |
+32:01:04.2 |
HIP 44574 |
28.75 |