メタデータ
| 項目 |
値 |
| Designation |
C/2024 N4 (Sarneczky) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-01-09T23:14:49.182720Z |
| Orbit solution date (soln_date, UTC) |
2026-03-21T13:42:22Z |
| Obs used |
469 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
11.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-07-14T23:03:55.584000Z |
| Discovery magnitude (MPC) |
19.00 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) |
2025-01-10.0000000 |
| e |
1.00454035 |
| q (au) |
5.397605 |
| a (au) |
-1188.808944 |
| i (deg) |
49.771300 |
| Ω (om, deg) |
339.662444 |
| ω (w, deg) |
116.676997 |
| M (ma, deg) |
0.000001 |
等級
散乱 + 全体線形
$$
M_a = (3.153 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.153 |
| n |
6.000 |
| gf |
0.989 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.977 |
| 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) |
| 2026-05-12 00:00 |
09:47:34.30 |
+25:55:30.9 |
HIP 48024 |
22.90 |
| 2026-05-12 12:00 |
09:47:37.62 |
+25:52:25.2 |
HIP 48024 |
26.06 |
| 2026-05-13 00:00 |
09:47:41.08 |
+25:49:19.2 |
HIP 48024 |
29.24 |
| 2026-05-13 12:00 |
09:47:44.70 |
+25:46:13.1 |
HIP 48024 |
32.43 |
| 2026-05-14 00:00 |
09:47:48.46 |
+25:43:06.7 |
HIP 48107 |
33.99 |
| 2026-05-14 12:00 |
09:47:52.37 |
+25:40:00.2 |
HIP 48107 |
30.76 |
| 2026-05-15 00:00 |
09:47:56.43 |
+25:36:53.4 |
HIP 48107 |
27.51 |
| 2026-05-15 12:00 |
09:48:00.63 |
+25:33:46.4 |
HIP 48107 |
24.25 |
| 2026-05-16 00:00 |
09:48:04.98 |
+25:30:39.2 |
HIP 48107 |
20.98 |
| 2026-05-16 12:00 |
09:48:09.47 |
+25:27:31.8 |
HIP 48107 |
17.70 |
| 2026-05-17 00:00 |
09:48:14.10 |
+25:24:24.2 |
HIP 48107 |
14.41 |
| 2026-05-17 12:00 |
09:48:18.88 |
+25:21:16.4 |
HIP 48107 |
11.11 |
| 2026-05-18 00:00 |
09:48:23.79 |
+25:18:08.5 |
HIP 48107 |
7.81 |
| 2026-05-18 12:00 |
09:48:28.85 |
+25:15:00.4 |
HIP 48107 |
4.53 |
| 2026-05-19 00:00 |
09:48:34.05 |
+25:11:52.0 |
HIP 48107 |
1.55 |
| 2026-05-19 12:00 |
09:48:39.38 |
+25:08:43.6 |
HIP 48107 |
2.62 |
| 2026-05-20 00:00 |
09:48:44.85 |
+25:05:34.9 |
HIP 48107 |
5.85 |
| 2026-05-20 12:00 |
09:48:50.46 |
+25:02:26.1 |
HIP 48107 |
9.21 |
| 2026-05-21 00:00 |
09:48:56.21 |
+24:59:17.2 |
HIP 48107 |
12.60 |
| 2026-05-21 12:00 |
09:49:02.09 |
+24:56:08.0 |
HIP 48107 |
16.01 |
| 2026-05-22 00:00 |
09:49:08.10 |
+24:52:58.8 |
HIP 48107 |
19.45 |
| 2026-05-22 12:00 |
09:49:14.24 |
+24:49:49.4 |
HIP 48124 |
18.46 |
| 2026-05-23 00:00 |
09:49:20.51 |
+24:46:39.8 |
HIP 48124 |
16.30 |
| 2026-05-23 12:00 |
09:49:26.92 |
+24:43:30.1 |
HIP 48248 |
13.90 |
| 2026-05-24 00:00 |
09:49:33.45 |
+24:40:20.3 |
HIP 48248 |
10.69 |
| 2026-05-24 12:00 |
09:49:40.12 |
+24:37:10.4 |
HIP 48248 |
7.70 |
| 2026-05-25 00:00 |
09:49:46.91 |
+24:34:00.3 |
HIP 48248 |
5.34 |
| 2026-05-25 12:00 |
09:49:53.82 |
+24:30:50.1 |
HIP 48248 |
4.74 |
| 2026-05-26 00:00 |
09:50:00.86 |
+24:27:39.8 |
HIP 48248 |
6.43 |
| 2026-05-26 12:00 |
09:50:08.03 |
+24:24:29.4 |
HIP 48248 |
9.24 |
| 2026-05-27 00:00 |
09:50:15.32 |
+24:21:18.9 |
HIP 48248 |
12.45 |
| 2026-05-27 12:00 |
09:50:22.73 |
+24:18:08.2 |
HIP 48248 |
15.83 |
| 2026-05-28 00:00 |
09:50:30.26 |
+24:14:57.5 |
HIP 48248 |
19.30 |
| 2026-05-28 12:00 |
09:50:37.92 |
+24:11:46.6 |
HIP 48315 |
20.71 |
| 2026-05-29 00:00 |
09:50:45.69 |
+24:08:35.7 |
HIP 48315 |
17.24 |
| 2026-05-29 12:00 |
09:50:53.58 |
+24:05:24.6 |
HIP 48315 |
13.86 |
| 2026-05-30 00:00 |
09:51:01.59 |
+24:02:13.5 |
HIP 48315 |
10.66 |
| 2026-05-30 12:00 |
09:51:09.72 |
+23:59:02.2 |
HIP 48315 |
7.89 |
| 2026-05-31 00:00 |
09:51:17.96 |
+23:55:50.9 |
HIP 48315 |
6.20 |
| 2026-05-31 12:00 |
09:51:26.31 |
+23:52:39.5 |
HIP 48315 |
6.50 |
| 2026-06-01 00:00 |
09:51:34.79 |
+23:49:28.0 |
HIP 48315 |
8.62 |
| 2026-06-01 12:00 |
09:51:43.37 |
+23:46:16.4 |
HIP 48315 |
11.61 |
| 2026-06-02 00:00 |
09:51:52.07 |
+23:43:04.7 |
HIP 48315 |
14.97 |