メタデータ
| 項目 |
値 |
| Designation |
C/2022 J1 (Maury-Attard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-02-19T01:09:17.403840Z |
| Orbit solution date (soln_date, UTC) |
2022-11-10T22:12:46Z |
| Obs used |
159 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
20.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-05-05T09:15:21.024000Z |
| Discovery magnitude (MPC) |
17.60 G |
| Discovery observatory (MPC) |
W94 · MAPS, San Pedro de Atacama |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-05-25.0000000 |
| e |
0.96638573 |
| q (au) |
1.604208 |
| a (au) |
47.724012 |
| i (deg) |
105.929932 |
| Ω (om, deg) |
280.722913 |
| ω (w, deg) |
305.660142 |
| M (ma, deg) |
0.283859 |
等級
散乱 + 全体線形
$$
M_a = (12.315 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.315 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
15:32:14.29 |
+59:35:17.8 |
HIP 76040 |
8.69 |
| 2026-07-29 12:00 |
15:32:07.59 |
+59:33:30.4 |
HIP 76040 |
10.09 |
| 2026-07-30 00:00 |
15:32:01.05 |
+59:31:42.6 |
HIP 76040 |
11.67 |
| 2026-07-30 12:00 |
15:31:54.65 |
+59:29:54.5 |
HIP 76040 |
13.36 |
| 2026-07-31 00:00 |
15:31:48.40 |
+59:28:06.1 |
HIP 76040 |
15.12 |
| 2026-07-31 12:00 |
15:31:42.31 |
+59:26:17.4 |
HIP 76040 |
16.94 |
| 2026-08-01 00:00 |
15:31:36.36 |
+59:24:28.3 |
HIP 76040 |
18.79 |
| 2026-08-01 12:00 |
15:31:30.56 |
+59:22:39.0 |
HIP 76040 |
20.66 |
| 2026-08-02 00:00 |
15:31:24.91 |
+59:20:49.4 |
HIP 76040 |
22.56 |
| 2026-08-02 12:00 |
15:31:19.40 |
+59:18:59.5 |
HIP 76040 |
24.46 |
| 2026-08-03 00:00 |
15:31:14.05 |
+59:17:09.3 |
HIP 76040 |
26.38 |
| 2026-08-03 12:00 |
15:31:08.84 |
+59:15:18.9 |
HIP 76040 |
28.30 |
| 2026-08-04 00:00 |
15:31:03.78 |
+59:13:28.2 |
HIP 76040 |
30.23 |
| 2026-08-04 12:00 |
15:30:58.87 |
+59:11:37.3 |
HIP 76040 |
32.16 |
| 2026-08-05 00:00 |
15:30:54.11 |
+59:09:46.1 |
HIP 76040 |
34.10 |
| 2026-08-05 12:00 |
15:30:49.49 |
+59:07:54.7 |
HIP 76040 |
36.03 |
| 2026-08-06 00:00 |
15:30:45.02 |
+59:06:03.1 |
HIP 76332 |
36.77 |
| 2026-08-06 12:00 |
15:30:40.70 |
+59:04:11.3 |
HIP 76332 |
37.38 |
| 2026-08-07 00:00 |
15:30:36.52 |
+59:02:19.3 |
HIP 76332 |
38.06 |
| 2026-08-07 12:00 |
15:30:32.50 |
+59:00:27.1 |
HIP 76332 |
38.80 |
| 2026-08-08 00:00 |
15:30:28.61 |
+58:58:34.7 |
HIP 76332 |
39.62 |
| 2026-08-08 12:00 |
15:30:24.88 |
+58:56:42.2 |
HIP 76332 |
40.49 |
| 2026-08-09 00:00 |
15:30:21.29 |
+58:54:49.5 |
HIP 76332 |
41.41 |
| 2026-08-09 12:00 |
15:30:17.84 |
+58:52:56.6 |
HIP 75458 |
41.86 |
| 2026-08-10 00:00 |
15:30:14.54 |
+58:51:03.6 |
HIP 75458 |
41.73 |
| 2026-08-10 12:00 |
15:30:11.39 |
+58:49:10.5 |
HIP 75458 |
41.70 |
| 2026-08-11 00:00 |
15:30:08.38 |
+58:47:17.2 |
HIP 75458 |
41.78 |
| 2026-08-11 12:00 |
15:30:05.51 |
+58:45:23.9 |
HIP 75458 |
41.97 |
| 2026-08-12 00:00 |
15:30:02.79 |
+58:43:30.4 |
HIP 75458 |
42.26 |
| 2026-08-12 12:00 |
15:30:00.22 |
+58:41:36.9 |
HIP 75458 |
42.65 |
| 2026-08-13 00:00 |
15:29:57.78 |
+58:39:43.3 |
HIP 75458 |
43.14 |
| 2026-08-13 12:00 |
15:29:55.49 |
+58:37:49.6 |
HIP 75458 |
43.73 |
| 2026-08-14 00:00 |
15:29:53.35 |
+58:35:55.8 |
HIP 76081 |
42.63 |
| 2026-08-14 12:00 |
15:29:51.34 |
+58:34:02.0 |
HIP 76081 |
41.07 |
| 2026-08-15 00:00 |
15:29:49.48 |
+58:32:08.2 |
HIP 76081 |
39.53 |
| 2026-08-15 12:00 |
15:29:47.75 |
+58:30:14.3 |
HIP 76081 |
38.02 |
| 2026-08-16 00:00 |
15:29:46.17 |
+58:28:20.4 |
HIP 76081 |
36.53 |
| 2026-08-16 12:00 |
15:29:44.73 |
+58:26:26.5 |
HIP 76081 |
35.07 |
| 2026-08-17 00:00 |
15:29:43.43 |
+58:24:32.6 |
HIP 76081 |
33.65 |
| 2026-08-17 12:00 |
15:29:42.26 |
+58:22:38.7 |
HIP 76081 |
32.26 |
| 2026-08-18 00:00 |
15:29:41.24 |
+58:20:44.8 |
HIP 76081 |
30.92 |
| 2026-08-18 12:00 |
15:29:40.35 |
+58:18:50.9 |
HIP 76081 |
29.62 |
| 2026-08-19 00:00 |
15:29:39.60 |
+58:16:57.1 |
HIP 76081 |
28.39 |