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) |
| 2026-09-20 00:00 |
19:23:33.98 |
-34:03:21.7 |
HIP 95313 |
28.26 |
| 2026-09-20 12:00 |
19:23:29.93 |
-34:02:51.7 |
HIP 95313 |
28.74 |
| 2026-09-21 00:00 |
19:23:25.97 |
-34:02:21.6 |
HIP 95313 |
29.26 |
| 2026-09-21 12:00 |
19:23:22.09 |
-34:01:51.3 |
HIP 95313 |
29.79 |
| 2026-09-22 00:00 |
19:23:18.30 |
-34:01:20.9 |
HIP 95358 |
30.18 |
| 2026-09-22 12:00 |
19:23:14.60 |
-34:00:50.2 |
HIP 95358 |
29.94 |
| 2026-09-23 00:00 |
19:23:10.98 |
-34:00:19.4 |
HIP 95358 |
29.71 |
| 2026-09-23 12:00 |
19:23:07.44 |
-33:59:48.4 |
HIP 95358 |
29.50 |
| 2026-09-24 00:00 |
19:23:04.00 |
-33:59:17.3 |
HIP 95358 |
29.31 |
| 2026-09-24 12:00 |
19:23:00.64 |
-33:58:46.0 |
HIP 95358 |
29.13 |
| 2026-09-25 00:00 |
19:22:57.37 |
-33:58:14.5 |
HIP 95358 |
28.97 |
| 2026-09-25 12:00 |
19:22:54.18 |
-33:57:42.8 |
HIP 95358 |
28.82 |
| 2026-09-26 00:00 |
19:22:51.08 |
-33:57:11.0 |
HIP 95358 |
28.68 |
| 2026-09-26 12:00 |
19:22:48.07 |
-33:56:39.1 |
HIP 95358 |
28.55 |
| 2026-09-27 00:00 |
19:22:45.14 |
-33:56:07.0 |
HIP 95358 |
28.44 |
| 2026-09-27 12:00 |
19:22:42.30 |
-33:55:34.7 |
HIP 95358 |
28.34 |
| 2026-09-28 00:00 |
19:22:39.54 |
-33:55:02.3 |
HIP 95358 |
28.24 |
| 2026-09-28 12:00 |
19:22:36.88 |
-33:54:29.7 |
HIP 95358 |
28.16 |
| 2026-09-29 00:00 |
19:22:34.29 |
-33:53:57.0 |
HIP 95358 |
28.08 |
| 2026-09-29 12:00 |
19:22:31.80 |
-33:53:24.2 |
HIP 95358 |
28.01 |
| 2026-09-30 00:00 |
19:22:29.39 |
-33:52:51.2 |
HIP 95358 |
27.94 |
| 2026-09-30 12:00 |
19:22:27.07 |
-33:52:18.0 |
HIP 95358 |
27.88 |
| 2026-10-01 00:00 |
19:22:24.83 |
-33:51:44.8 |
HIP 95358 |
27.83 |
| 2026-10-01 12:00 |
19:22:22.68 |
-33:51:11.4 |
HIP 95358 |
27.78 |
| 2026-10-02 00:00 |
19:22:20.62 |
-33:50:37.8 |
HIP 95358 |
27.73 |
| 2026-10-02 12:00 |
19:22:18.64 |
-33:50:04.2 |
HIP 95358 |
27.68 |
| 2026-10-03 00:00 |
19:22:16.75 |
-33:49:30.4 |
HIP 95358 |
27.64 |
| 2026-10-03 12:00 |
19:22:14.94 |
-33:48:56.4 |
HIP 95358 |
27.60 |
| 2026-10-04 00:00 |
19:22:13.23 |
-33:48:22.4 |
HIP 95358 |
27.56 |
| 2026-10-04 12:00 |
19:22:11.59 |
-33:47:48.2 |
HIP 95358 |
27.52 |
| 2026-10-05 00:00 |
19:22:10.05 |
-33:47:13.9 |
HIP 95358 |
27.48 |
| 2026-10-05 12:00 |
19:22:08.59 |
-33:46:39.5 |
HIP 95358 |
27.44 |
| 2026-10-06 00:00 |
19:22:07.21 |
-33:46:05.0 |
HIP 95358 |
27.39 |
| 2026-10-06 12:00 |
19:22:05.92 |
-33:45:30.3 |
HIP 95358 |
27.35 |
| 2026-10-07 00:00 |
19:22:04.72 |
-33:44:55.6 |
HIP 95358 |
27.30 |
| 2026-10-07 12:00 |
19:22:03.61 |
-33:44:20.7 |
HIP 95358 |
27.26 |
| 2026-10-08 00:00 |
19:22:02.58 |
-33:43:45.7 |
HIP 95358 |
27.21 |
| 2026-10-08 12:00 |
19:22:01.63 |
-33:43:10.6 |
HIP 95358 |
27.15 |
| 2026-10-09 00:00 |
19:22:00.77 |
-33:42:35.5 |
HIP 95358 |
27.09 |
| 2026-10-09 12:00 |
19:22:00.00 |
-33:42:00.2 |
HIP 95358 |
27.03 |
| 2026-10-10 00:00 |
19:21:59.31 |
-33:41:24.8 |
HIP 95358 |
26.97 |
| 2026-10-10 12:00 |
19:21:58.70 |
-33:40:49.3 |
HIP 95358 |
26.90 |
| 2026-10-11 00:00 |
19:21:58.18 |
-33:40:13.7 |
HIP 95358 |
26.83 |