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) |
| 2026-06-01 00:00 |
19:58:08.12 |
-33:57:50.3 |
HIP 98189 |
25.45 |
| 2026-06-01 12:00 |
19:57:59.99 |
-33:58:18.1 |
HIP 98189 |
24.31 |
| 2026-06-02 00:00 |
19:57:51.78 |
-33:58:46.0 |
HIP 98189 |
23.23 |
| 2026-06-02 12:00 |
19:57:43.51 |
-33:59:13.7 |
HIP 98189 |
22.24 |
| 2026-06-03 00:00 |
19:57:35.16 |
-33:59:41.4 |
HIP 98189 |
21.34 |
| 2026-06-03 12:00 |
19:57:26.75 |
-34:00:09.1 |
HIP 98189 |
20.57 |
| 2026-06-04 00:00 |
19:57:18.27 |
-34:00:36.7 |
HIP 98189 |
19.92 |
| 2026-06-04 12:00 |
19:57:09.72 |
-34:01:04.3 |
HIP 98189 |
19.43 |
| 2026-06-05 00:00 |
19:57:01.11 |
-34:01:31.7 |
HIP 98189 |
19.10 |
| 2026-06-05 12:00 |
19:56:52.43 |
-34:01:59.2 |
HIP 98189 |
18.95 |
| 2026-06-06 00:00 |
19:56:43.68 |
-34:02:26.5 |
HIP 98189 |
18.98 |
| 2026-06-06 12:00 |
19:56:34.87 |
-34:02:53.7 |
HIP 98189 |
19.20 |
| 2026-06-07 00:00 |
19:56:26.00 |
-34:03:20.9 |
HIP 98189 |
19.61 |
| 2026-06-07 12:00 |
19:56:17.06 |
-34:03:48.0 |
HIP 98189 |
20.20 |
| 2026-06-08 00:00 |
19:56:08.06 |
-34:04:15.0 |
HIP 98189 |
20.95 |
| 2026-06-08 12:00 |
19:55:58.99 |
-34:04:41.9 |
HIP 98189 |
21.85 |
| 2026-06-09 00:00 |
19:55:49.87 |
-34:05:08.7 |
HIP 98189 |
22.90 |
| 2026-06-09 12:00 |
19:55:40.68 |
-34:05:35.4 |
HIP 98189 |
24.06 |
| 2026-06-10 00:00 |
19:55:31.43 |
-34:06:02.0 |
HIP 98189 |
25.33 |
| 2026-06-10 12:00 |
19:55:22.12 |
-34:06:28.5 |
HIP 97946 |
26.16 |
| 2026-06-11 00:00 |
19:55:12.75 |
-34:06:54.9 |
HIP 97946 |
24.85 |
| 2026-06-11 12:00 |
19:55:03.33 |
-34:07:21.2 |
HIP 97946 |
23.64 |
| 2026-06-12 00:00 |
19:54:53.84 |
-34:07:47.3 |
HIP 97946 |
22.54 |
| 2026-06-12 12:00 |
19:54:44.30 |
-34:08:13.3 |
HIP 97946 |
21.57 |
| 2026-06-13 00:00 |
19:54:34.70 |
-34:08:39.2 |
HIP 97946 |
20.74 |
| 2026-06-13 12:00 |
19:54:25.05 |
-34:09:04.9 |
HIP 97946 |
20.10 |
| 2026-06-14 00:00 |
19:54:15.34 |
-34:09:30.5 |
HIP 97946 |
19.64 |
| 2026-06-14 12:00 |
19:54:05.57 |
-34:09:56.0 |
HIP 97946 |
19.40 |
| 2026-06-15 00:00 |
19:53:55.76 |
-34:10:21.3 |
HIP 97946 |
19.38 |
| 2026-06-15 12:00 |
19:53:45.89 |
-34:10:46.5 |
HIP 97946 |
19.59 |
| 2026-06-16 00:00 |
19:53:35.97 |
-34:11:11.5 |
HIP 97946 |
20.01 |
| 2026-06-16 12:00 |
19:53:25.99 |
-34:11:36.4 |
HIP 97946 |
20.65 |
| 2026-06-17 00:00 |
19:53:15.97 |
-34:12:01.1 |
HIP 97946 |
21.49 |
| 2026-06-17 12:00 |
19:53:05.90 |
-34:12:25.6 |
HIP 97946 |
22.50 |
| 2026-06-18 00:00 |
19:52:55.78 |
-34:12:49.9 |
HIP 97946 |
23.67 |
| 2026-06-18 12:00 |
19:52:45.61 |
-34:13:14.1 |
HIP 97946 |
24.97 |
| 2026-06-19 00:00 |
19:52:35.40 |
-34:13:38.1 |
HIP 97946 |
26.39 |
| 2026-06-19 12:00 |
19:52:25.14 |
-34:14:02.0 |
HIP 97946 |
27.91 |
| 2026-06-20 00:00 |
19:52:14.84 |
-34:14:25.6 |
HIP 97946 |
29.52 |
| 2026-06-20 12:00 |
19:52:04.49 |
-34:14:49.0 |
HIP 97946 |
31.21 |
| 2026-06-21 00:00 |
19:51:54.10 |
-34:15:12.3 |
HIP 97604 |
31.75 |
| 2026-06-21 12:00 |
19:51:43.67 |
-34:15:35.3 |
HIP 97604 |
30.13 |
| 2026-06-22 00:00 |
19:51:33.19 |
-34:15:58.2 |
HIP 97604 |
28.58 |