メタデータ
| 項目 |
値 |
| Designation |
C/2022 QE78 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-09-10T18:08:40.672320Z |
| Orbit solution date (soln_date, UTC) |
2026-05-08T13:42:11Z |
| Obs used |
3885 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
7.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-12-15.0000000 |
| e |
1.00433792 |
| q (au) |
5.477321 |
| a (au) |
-1262.659316 |
| i (deg) |
36.573237 |
| Ω (om, deg) |
119.911648 |
| ω (w, deg) |
0.475207 |
| M (ma, deg) |
-0.005926 |
等級
散乱 + 全体線形
$$
M_a = (6.582 + 2.263\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.582 |
| n |
2.263 |
| gf |
1.000 |
| gb |
-0.963 |
| 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) |
| 2026-05-12 00:00 |
09:12:56.06 |
+31:49:38.9 |
HIP 44986 |
43.70 |
| 2026-05-12 12:00 |
09:13:11.19 |
+31:49:05.1 |
HIP 45307 |
45.51 |
| 2026-05-13 00:00 |
09:13:26.47 |
+31:48:30.6 |
HIP 45307 |
44.25 |
| 2026-05-13 12:00 |
09:13:41.89 |
+31:47:55.4 |
HIP 45307 |
43.20 |
| 2026-05-14 00:00 |
09:13:57.45 |
+31:47:19.6 |
HIP 45517 |
40.92 |
| 2026-05-14 12:00 |
09:14:13.16 |
+31:46:43.1 |
HIP 45517 |
38.61 |
| 2026-05-15 00:00 |
09:14:29.00 |
+31:46:06.0 |
HIP 45517 |
36.44 |
| 2026-05-15 12:00 |
09:14:44.98 |
+31:45:28.2 |
HIP 45517 |
34.47 |
| 2026-05-16 00:00 |
09:15:01.10 |
+31:44:49.8 |
HIP 45517 |
32.73 |
| 2026-05-16 12:00 |
09:15:17.36 |
+31:44:10.7 |
HIP 45517 |
31.28 |
| 2026-05-17 00:00 |
09:15:33.75 |
+31:43:31.0 |
HIP 45517 |
30.16 |
| 2026-05-17 12:00 |
09:15:50.28 |
+31:42:50.7 |
HIP 45517 |
29.43 |
| 2026-05-18 00:00 |
09:16:06.95 |
+31:42:09.8 |
HIP 45517 |
29.12 |
| 2026-05-18 12:00 |
09:16:23.74 |
+31:41:28.2 |
HIP 45584 |
27.03 |
| 2026-05-19 00:00 |
09:16:40.67 |
+31:40:46.1 |
HIP 45584 |
24.77 |
| 2026-05-19 12:00 |
09:16:57.74 |
+31:40:03.3 |
HIP 45584 |
22.87 |
| 2026-05-20 00:00 |
09:17:14.93 |
+31:39:19.9 |
HIP 45584 |
21.43 |
| 2026-05-20 12:00 |
09:17:32.25 |
+31:38:36.0 |
HIP 45584 |
20.56 |
| 2026-05-21 00:00 |
09:17:49.70 |
+31:37:51.4 |
HIP 45584 |
20.37 |
| 2026-05-21 12:00 |
09:18:07.28 |
+31:37:06.3 |
HIP 45584 |
20.87 |
| 2026-05-22 00:00 |
09:18:24.98 |
+31:36:20.6 |
HIP 45584 |
22.05 |
| 2026-05-22 12:00 |
09:18:42.81 |
+31:35:34.4 |
HIP 45584 |
23.81 |
| 2026-05-23 00:00 |
09:19:00.77 |
+31:34:47.6 |
HIP 45584 |
26.04 |
| 2026-05-23 12:00 |
09:19:18.85 |
+31:34:00.2 |
HIP 45584 |
28.66 |
| 2026-05-24 00:00 |
09:19:37.05 |
+31:33:12.3 |
HIP 45584 |
31.57 |
| 2026-05-24 12:00 |
09:19:55.37 |
+31:32:23.8 |
HIP 45584 |
34.71 |
| 2026-05-25 00:00 |
09:20:13.81 |
+31:31:34.8 |
HIP 45584 |
38.03 |
| 2026-05-25 12:00 |
09:20:32.37 |
+31:30:45.3 |
HIP 45584 |
41.50 |
| 2026-05-26 00:00 |
09:20:51.05 |
+31:29:55.2 |
HIP 45584 |
45.09 |
| 2026-05-26 12:00 |
09:21:09.85 |
+31:29:04.6 |
HIP 45910 |
47.20 |
| 2026-05-27 00:00 |
09:21:28.76 |
+31:28:13.5 |
HIP 45910 |
47.69 |
| 2026-05-27 12:00 |
09:21:47.79 |
+31:27:21.9 |
HIP 45910 |
48.53 |
| 2026-05-28 00:00 |
09:22:06.93 |
+31:26:29.7 |
HIP 45910 |
49.71 |
| 2026-05-28 12:00 |
09:22:26.19 |
+31:25:37.1 |
HIP 46135 |
49.49 |
| 2026-05-29 00:00 |
09:22:45.56 |
+31:24:43.9 |
HIP 46135 |
46.62 |
| 2026-05-29 12:00 |
09:23:05.05 |
+31:23:50.3 |
HIP 46135 |
43.96 |
| 2026-05-30 00:00 |
09:23:24.64 |
+31:22:56.2 |
HIP 46135 |
41.54 |
| 2026-05-30 12:00 |
09:23:44.34 |
+31:22:01.6 |
HIP 46302 |
37.86 |
| 2026-05-31 00:00 |
09:24:04.16 |
+31:21:06.5 |
HIP 46302 |
33.54 |
| 2026-05-31 12:00 |
09:24:24.08 |
+31:20:10.9 |
HIP 46302 |
29.21 |
| 2026-06-01 00:00 |
09:24:44.11 |
+31:19:14.8 |
HIP 46302 |
24.86 |
| 2026-06-01 12:00 |
09:25:04.25 |
+31:18:18.3 |
HIP 46302 |
20.50 |
| 2026-06-02 00:00 |
09:25:24.49 |
+31:17:21.3 |
HIP 46302 |
16.13 |