メタデータ
| 項目 |
値 |
| Designation |
C/2022 N1 (Attard-Maury) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-09-10T01:06:56.952000Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:22Z |
| Obs used |
222 |
| NEO |
- |
| M1 |
17.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-07-02T07:43:58.080000Z |
| Discovery magnitude (MPC) |
17.20 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) |
2022-08-01.0000000 |
| e |
0.96002870 |
| q (au) |
1.481828 |
| a (au) |
37.072286 |
| i (deg) |
164.740998 |
| Ω (om, deg) |
301.858165 |
| ω (w, deg) |
41.069648 |
| M (ma, deg) |
359.825138 |
等級
散乱 + 全体線形
$$
M_a = (16.829 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.829 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.908 |
| 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 |
08:04:58.94 |
+19:31:47.5 |
HIP 39499 |
17.78 |
| 2026-07-29 12:00 |
08:05:06.76 |
+19:31:18.7 |
HIP 39499 |
19.06 |
| 2026-07-30 00:00 |
08:05:14.56 |
+19:30:49.9 |
HIP 39499 |
20.43 |
| 2026-07-30 12:00 |
08:05:22.35 |
+19:30:21.2 |
HIP 39499 |
21.88 |
| 2026-07-31 00:00 |
08:05:30.12 |
+19:29:52.4 |
HIP 39499 |
23.39 |
| 2026-07-31 12:00 |
08:05:37.89 |
+19:29:23.6 |
HIP 39499 |
24.95 |
| 2026-08-01 00:00 |
08:05:45.63 |
+19:28:54.9 |
HIP 39499 |
26.56 |
| 2026-08-01 12:00 |
08:05:53.36 |
+19:28:26.1 |
HIP 39499 |
28.19 |
| 2026-08-02 00:00 |
08:06:01.08 |
+19:27:57.4 |
HIP 39749 |
29.10 |
| 2026-08-02 12:00 |
08:06:08.78 |
+19:27:28.7 |
HIP 39749 |
28.24 |
| 2026-08-03 00:00 |
08:06:16.47 |
+19:27:00.0 |
HIP 39749 |
27.49 |
| 2026-08-03 12:00 |
08:06:24.14 |
+19:26:31.2 |
HIP 39749 |
26.86 |
| 2026-08-04 00:00 |
08:06:31.79 |
+19:26:02.6 |
HIP 39816 |
26.33 |
| 2026-08-04 12:00 |
08:06:39.42 |
+19:25:33.9 |
HIP 39816 |
24.54 |
| 2026-08-05 00:00 |
08:06:47.03 |
+19:25:05.2 |
HIP 39816 |
22.76 |
| 2026-08-05 12:00 |
08:06:54.63 |
+19:24:36.6 |
HIP 39816 |
20.99 |
| 2026-08-06 00:00 |
08:07:02.21 |
+19:24:08.0 |
HIP 39816 |
19.25 |
| 2026-08-06 12:00 |
08:07:09.76 |
+19:23:39.4 |
HIP 39816 |
17.53 |
| 2026-08-07 00:00 |
08:07:17.30 |
+19:23:10.8 |
HIP 39816 |
15.85 |
| 2026-08-07 12:00 |
08:07:24.82 |
+19:22:42.3 |
HIP 39816 |
14.21 |
| 2026-08-08 00:00 |
08:07:32.31 |
+19:22:13.7 |
HIP 39816 |
12.62 |
| 2026-08-08 12:00 |
08:07:39.78 |
+19:21:45.3 |
HIP 39816 |
11.12 |
| 2026-08-09 00:00 |
08:07:47.23 |
+19:21:16.8 |
HIP 39816 |
9.73 |
| 2026-08-09 12:00 |
08:07:54.66 |
+19:20:48.4 |
HIP 39816 |
8.51 |
| 2026-08-10 00:00 |
08:08:02.06 |
+19:20:20.0 |
HIP 39816 |
7.53 |
| 2026-08-10 12:00 |
08:08:09.44 |
+19:19:51.6 |
HIP 39816 |
6.89 |
| 2026-08-11 00:00 |
08:08:16.80 |
+19:19:23.3 |
HIP 39816 |
6.70 |
| 2026-08-11 12:00 |
08:08:24.13 |
+19:18:55.0 |
HIP 39816 |
6.98 |
| 2026-08-12 00:00 |
08:08:31.43 |
+19:18:26.8 |
HIP 39816 |
7.67 |
| 2026-08-12 12:00 |
08:08:38.71 |
+19:17:58.6 |
HIP 39816 |
8.68 |
| 2026-08-13 00:00 |
08:08:45.96 |
+19:17:30.5 |
HIP 39816 |
9.90 |
| 2026-08-13 12:00 |
08:08:53.18 |
+19:17:02.4 |
HIP 39816 |
11.26 |
| 2026-08-14 00:00 |
08:09:00.37 |
+19:16:34.4 |
HIP 39816 |
12.72 |
| 2026-08-14 12:00 |
08:09:07.54 |
+19:16:06.4 |
HIP 39816 |
14.24 |
| 2026-08-15 00:00 |
08:09:14.67 |
+19:15:38.4 |
HIP 39816 |
15.80 |
| 2026-08-15 12:00 |
08:09:21.78 |
+19:15:10.6 |
HIP 39991 |
15.48 |
| 2026-08-16 00:00 |
08:09:28.85 |
+19:14:42.7 |
HIP 39991 |
14.14 |
| 2026-08-16 12:00 |
08:09:35.90 |
+19:14:15.0 |
HIP 39991 |
12.90 |
| 2026-08-17 00:00 |
08:09:42.91 |
+19:13:47.3 |
HIP 39991 |
11.79 |
| 2026-08-17 12:00 |
08:09:49.89 |
+19:13:19.7 |
HIP 39991 |
10.83 |
| 2026-08-18 00:00 |
08:09:56.84 |
+19:12:52.1 |
HIP 39991 |
10.09 |
| 2026-08-18 12:00 |
08:10:03.76 |
+19:12:24.6 |
HIP 39991 |
9.59 |
| 2026-08-19 00:00 |
08:10:10.64 |
+19:11:57.2 |
HIP 39991 |
9.37 |