メタデータ
| 項目 |
値 |
| Designation |
C/2022 A1 (Sarneczky) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-01-31T03:23:29.235840Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:12Z |
| Obs used |
316 |
| NEO |
- |
| M1 |
18.400 |
| K1 |
17.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-01-02T02:37:18.336000Z |
| Discovery magnitude (MPC) |
18.20 R |
| Discovery observatory (MPC) |
K88 · GINOP-KHK, Piszkéstető |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-01-07.0000000 |
| e |
0.99916780 |
| q (au) |
1.252910 |
| a (au) |
1505.543465 |
| i (deg) |
116.526637 |
| Ω (om, deg) |
285.521193 |
| ω (w, deg) |
201.184705 |
| M (ma, deg) |
359.999593 |
等級
散乱 + 全体線形
$$
M_a = (18.046 + 5.791\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.046 |
| n |
5.791 |
| gf |
1.000 |
| gb |
-0.582 |
| k |
0.986 |
| 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 |
19:37:46.93 |
-34:31:39.1 |
HIP 96531 |
16.55 |
| 2026-07-29 12:00 |
19:37:35.98 |
-34:31:39.8 |
HIP 96531 |
16.28 |
| 2026-07-30 00:00 |
19:37:25.05 |
-34:31:40.1 |
HIP 96531 |
16.31 |
| 2026-07-30 12:00 |
19:37:14.16 |
-34:31:40.1 |
HIP 96531 |
16.64 |
| 2026-07-31 00:00 |
19:37:03.30 |
-34:31:39.7 |
HIP 96382 |
15.78 |
| 2026-07-31 12:00 |
19:36:52.48 |
-34:31:39.0 |
HIP 96382 |
13.56 |
| 2026-08-01 00:00 |
19:36:41.68 |
-34:31:37.9 |
HIP 96382 |
11.34 |
| 2026-08-01 12:00 |
19:36:30.92 |
-34:31:36.5 |
HIP 96382 |
9.13 |
| 2026-08-02 00:00 |
19:36:20.19 |
-34:31:34.8 |
HIP 96382 |
6.93 |
| 2026-08-02 12:00 |
19:36:09.50 |
-34:31:32.6 |
HIP 96382 |
4.76 |
| 2026-08-03 00:00 |
19:35:58.85 |
-34:31:30.2 |
HIP 96382 |
2.63 |
| 2026-08-03 12:00 |
19:35:48.23 |
-34:31:27.4 |
HIP 96382 |
0.89 |
| 2026-08-04 00:00 |
19:35:37.65 |
-34:31:24.3 |
HIP 96382 |
2.06 |
| 2026-08-04 12:00 |
19:35:27.11 |
-34:31:20.8 |
HIP 96382 |
4.13 |
| 2026-08-05 00:00 |
19:35:16.61 |
-34:31:16.9 |
HIP 96382 |
6.27 |
| 2026-08-05 12:00 |
19:35:06.15 |
-34:31:12.7 |
HIP 96382 |
8.41 |
| 2026-08-06 00:00 |
19:34:55.73 |
-34:31:08.2 |
HIP 96382 |
10.55 |
| 2026-08-06 12:00 |
19:34:45.35 |
-34:31:03.3 |
HIP 96382 |
12.68 |
| 2026-08-07 00:00 |
19:34:35.02 |
-34:30:58.1 |
HIP 96382 |
14.80 |
| 2026-08-07 12:00 |
19:34:24.73 |
-34:30:52.6 |
HIP 96382 |
16.92 |
| 2026-08-08 00:00 |
19:34:14.48 |
-34:30:46.7 |
HIP 96155 |
15.96 |
| 2026-08-08 12:00 |
19:34:04.28 |
-34:30:40.4 |
HIP 96155 |
14.04 |
| 2026-08-09 00:00 |
19:33:54.13 |
-34:30:33.8 |
HIP 96155 |
12.18 |
| 2026-08-09 12:00 |
19:33:44.03 |
-34:30:26.9 |
HIP 96155 |
10.41 |
| 2026-08-10 00:00 |
19:33:33.97 |
-34:30:19.6 |
HIP 96155 |
8.79 |
| 2026-08-10 12:00 |
19:33:23.96 |
-34:30:12.0 |
HIP 96155 |
7.41 |
| 2026-08-11 00:00 |
19:33:14.00 |
-34:30:04.1 |
HIP 96155 |
6.39 |
| 2026-08-11 12:00 |
19:33:04.09 |
-34:29:55.8 |
HIP 96155 |
5.94 |
| 2026-08-12 00:00 |
19:32:54.24 |
-34:29:47.1 |
HIP 96155 |
6.17 |
| 2026-08-12 12:00 |
19:32:44.43 |
-34:29:38.2 |
HIP 96155 |
6.99 |
| 2026-08-13 00:00 |
19:32:34.68 |
-34:29:28.9 |
HIP 96155 |
8.23 |
| 2026-08-13 12:00 |
19:32:24.98 |
-34:29:19.2 |
HIP 96155 |
9.72 |
| 2026-08-14 00:00 |
19:32:15.34 |
-34:29:09.2 |
HIP 96155 |
11.36 |
| 2026-08-14 12:00 |
19:32:05.76 |
-34:28:58.9 |
HIP 96155 |
13.08 |
| 2026-08-15 00:00 |
19:31:56.23 |
-34:28:48.3 |
HIP 96155 |
14.86 |
| 2026-08-15 12:00 |
19:31:46.75 |
-34:28:37.3 |
HIP 96155 |
16.67 |
| 2026-08-16 00:00 |
19:31:37.34 |
-34:28:26.0 |
HIP 96155 |
18.50 |
| 2026-08-16 12:00 |
19:31:27.98 |
-34:28:14.4 |
HIP 96155 |
20.33 |
| 2026-08-17 00:00 |
19:31:18.68 |
-34:28:02.4 |
HIP 96155 |
22.17 |
| 2026-08-17 12:00 |
19:31:09.44 |
-34:27:50.1 |
HIP 96155 |
24.02 |
| 2026-08-18 00:00 |
19:31:00.27 |
-34:27:37.5 |
HIP 96155 |
25.86 |
| 2026-08-18 12:00 |
19:30:51.15 |
-34:27:24.6 |
HIP 96155 |
27.69 |
| 2026-08-19 00:00 |
19:30:42.10 |
-34:27:11.3 |
HIP 95921 |
29.18 |