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
$$
M_a = (3.053 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.053 |
| n |
6.000 |
| gf |
0.979 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
9.929 |
| 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 |
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 |
| 2026-06-02 12:00 |
09:52:00.87 |
+23:39:52.9 |
HIP 48315 |
18.50 |
| 2026-06-03 00:00 |
09:52:09.79 |
+23:36:41.1 |
HIP 48315 |
22.14 |
| 2026-06-03 12:00 |
09:52:18.82 |
+23:33:29.2 |
HIP 48315 |
25.84 |
| 2026-06-04 00:00 |
09:52:27.96 |
+23:30:17.2 |
HIP 48585 |
28.68 |
| 2026-06-04 12:00 |
09:52:37.20 |
+23:27:05.2 |
HIP 48585 |
26.41 |
| 2026-06-05 00:00 |
09:52:46.56 |
+23:23:53.1 |
HIP 48585 |
24.50 |
| 2026-06-05 12:00 |
09:52:56.02 |
+23:20:40.9 |
HIP 48585 |
23.07 |
| 2026-06-06 00:00 |
09:53:05.58 |
+23:17:28.6 |
HIP 48585 |
22.20 |
| 2026-06-06 12:00 |
09:53:15.25 |
+23:14:16.3 |
HIP 48585 |
21.97 |
| 2026-06-07 00:00 |
09:53:25.02 |
+23:11:03.9 |
HIP 48398 |
22.08 |
| 2026-06-07 12:00 |
09:53:34.90 |
+23:07:51.5 |
HIP 48398 |
22.82 |
| 2026-06-08 00:00 |
09:53:44.88 |
+23:04:39.0 |
HIP 48398 |
24.20 |
| 2026-06-08 12:00 |
09:53:54.96 |
+23:01:26.4 |
HIP 48398 |
26.14 |
| 2026-06-09 00:00 |
09:54:05.14 |
+22:58:13.8 |
HIP 48462 |
27.03 |
| 2026-06-09 12:00 |
09:54:15.43 |
+22:55:01.1 |
HIP 48462 |
26.31 |
| 2026-06-10 00:00 |
09:54:25.81 |
+22:51:48.4 |
HIP 48462 |
26.20 |
| 2026-06-10 12:00 |
09:54:36.29 |
+22:48:35.6 |
HIP 48462 |
26.73 |
| 2026-06-11 00:00 |
09:54:46.86 |
+22:45:22.8 |
HIP 48462 |
27.85 |
| 2026-06-11 12:00 |
09:54:57.54 |
+22:42:09.9 |
HIP 48462 |
29.51 |
| 2026-06-12 00:00 |
09:55:08.31 |
+22:38:56.9 |
HIP 48462 |
31.63 |
| 2026-06-12 12:00 |
09:55:19.17 |
+22:35:44.0 |
HIP 48462 |
34.13 |
| 2026-06-13 00:00 |
09:55:30.13 |
+22:32:30.9 |
HIP 48462 |
36.93 |
| 2026-06-13 12:00 |
09:55:41.18 |
+22:29:17.9 |
HIP 48874 |
35.33 |
| 2026-06-14 00:00 |
09:55:52.33 |
+22:26:04.8 |
HIP 48874 |
34.06 |
| 2026-06-14 12:00 |
09:56:03.56 |
+22:22:51.6 |
HIP 48874 |
33.23 |
| 2026-06-15 00:00 |
09:56:14.89 |
+22:19:38.5 |
HIP 48900 |
31.36 |
| 2026-06-15 12:00 |
09:56:26.31 |
+22:16:25.3 |
HIP 48900 |
28.82 |
| 2026-06-16 00:00 |
09:56:37.81 |
+22:13:12.0 |
HIP 48900 |
26.66 |
| 2026-06-16 12:00 |
09:56:49.41 |
+22:09:58.7 |
HIP 48900 |
25.00 |
| 2026-06-17 00:00 |
09:57:01.09 |
+22:06:45.4 |
HIP 48900 |
23.94 |
| 2026-06-17 12:00 |
09:57:12.86 |
+22:03:32.1 |
HIP 48900 |
23.59 |
| 2026-06-18 00:00 |
09:57:24.71 |
+22:00:18.8 |
HIP 48900 |
23.97 |
| 2026-06-18 12:00 |
09:57:36.65 |
+21:57:05.4 |
HIP 48900 |
25.05 |
| 2026-06-19 00:00 |
09:57:48.67 |
+21:53:52.0 |
HIP 48900 |
26.77 |
| 2026-06-19 12:00 |
09:58:00.77 |
+21:50:38.7 |
HIP 48900 |
29.01 |
| 2026-06-20 00:00 |
09:58:12.96 |
+21:47:25.2 |
HIP 48900 |
31.66 |
| 2026-06-20 12:00 |
09:58:25.22 |
+21:44:11.8 |
HIP 48977 |
28.89 |
| 2026-06-21 00:00 |
09:58:37.57 |
+21:40:58.4 |
HIP 48977 |
24.67 |
| 2026-06-21 12:00 |
09:58:49.99 |
+21:37:45.0 |
HIP 48977 |
20.49 |
| 2026-06-22 00:00 |
09:59:02.49 |
+21:34:31.5 |
HIP 48977 |
16.37 |