メタデータ
| 項目 |
値 |
| Designation |
C/2024 N3 (Sarneczky) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-04-11T09:57:03.582720Z |
| Orbit solution date (soln_date, UTC) |
2026-05-28T12:12:15Z |
| Obs used |
658 |
| NEO |
- |
| M1 |
6.800 |
| K1 |
11.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-07-08T21:31:16.608000Z |
| Discovery magnitude (MPC) |
19.60 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) |
2025-04-21.0000000 |
| e |
1.00127373 |
| q (au) |
5.014578 |
| a (au) |
-3936.918542 |
| i (deg) |
88.728950 |
| Ω (om, deg) |
82.608609 |
| ω (w, deg) |
86.882336 |
| M (ma, deg) |
0.000038 |
等級
散乱 + 全体線形
$$
M_a = (3.326 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.326 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-10-09 |
2025-04-08 |
+8.8492 |
-6.066 |
| 2025-04-18 |
2026-03-20 |
-5.0452 |
+3.367 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
17:46:17.18 |
+31:33:10.4 |
HIP 86925 |
8.39 |
| 2026-06-01 12:00 |
17:45:51.42 |
+31:31:25.9 |
HIP 86925 |
2.65 |
| 2026-06-02 00:00 |
17:45:25.62 |
+31:29:38.9 |
HIP 86925 |
3.18 |
| 2026-06-02 12:00 |
17:44:59.77 |
+31:27:49.4 |
HIP 86925 |
8.97 |
| 2026-06-03 00:00 |
17:44:33.89 |
+31:25:57.4 |
HIP 86824 |
13.78 |
| 2026-06-03 12:00 |
17:44:07.97 |
+31:24:03.0 |
HIP 86824 |
16.20 |
| 2026-06-04 00:00 |
17:43:42.03 |
+31:22:06.0 |
HIP 86824 |
20.12 |
| 2026-06-04 12:00 |
17:43:16.05 |
+31:20:06.5 |
HIP 86825 |
23.35 |
| 2026-06-05 00:00 |
17:42:50.05 |
+31:18:04.5 |
HIP 86514 |
25.69 |
| 2026-06-05 12:00 |
17:42:24.02 |
+31:16:00.0 |
HIP 86514 |
20.11 |
| 2026-06-06 00:00 |
17:41:57.98 |
+31:13:53.0 |
HIP 86514 |
14.81 |
| 2026-06-06 12:00 |
17:41:31.91 |
+31:11:43.5 |
HIP 86514 |
10.27 |
| 2026-06-07 00:00 |
17:41:05.84 |
+31:09:31.5 |
HIP 86514 |
7.97 |
| 2026-06-07 12:00 |
17:40:39.75 |
+31:07:17.0 |
HIP 86514 |
9.70 |
| 2026-06-08 00:00 |
17:40:13.66 |
+31:05:00.0 |
HIP 86462 |
7.94 |
| 2026-06-08 12:00 |
17:39:47.56 |
+31:02:40.4 |
HIP 86462 |
9.71 |
| 2026-06-09 00:00 |
17:39:21.46 |
+31:00:18.3 |
HIP 86462 |
14.14 |
| 2026-06-09 12:00 |
17:38:55.36 |
+30:57:53.7 |
HIP 86462 |
19.50 |
| 2026-06-10 00:00 |
17:38:29.27 |
+30:55:26.6 |
HIP 86229 |
21.93 |
| 2026-06-10 12:00 |
17:38:03.18 |
+30:52:57.0 |
HIP 86178 |
19.46 |
| 2026-06-11 00:00 |
17:37:37.10 |
+30:50:24.9 |
HIP 86178 |
13.38 |
| 2026-06-11 12:00 |
17:37:11.04 |
+30:47:50.3 |
HIP 86178 |
7.41 |
| 2026-06-12 00:00 |
17:36:45.00 |
+30:45:13.2 |
HIP 86178 |
2.60 |
| 2026-06-12 12:00 |
17:36:18.97 |
+30:42:33.6 |
HIP 86178 |
5.94 |
| 2026-06-13 00:00 |
17:35:52.97 |
+30:39:51.5 |
HIP 86178 |
11.88 |
| 2026-06-13 12:00 |
17:35:26.99 |
+30:37:06.9 |
HIP 86178 |
18.02 |
| 2026-06-14 00:00 |
17:35:01.05 |
+30:34:19.8 |
HIP 85921 |
20.29 |
| 2026-06-14 12:00 |
17:34:35.13 |
+30:31:30.2 |
HIP 85921 |
14.28 |
| 2026-06-15 00:00 |
17:34:09.26 |
+30:28:38.2 |
HIP 85921 |
8.65 |
| 2026-06-15 12:00 |
17:33:43.42 |
+30:25:43.7 |
HIP 85921 |
4.93 |
| 2026-06-16 00:00 |
17:33:17.62 |
+30:22:46.8 |
HIP 85921 |
7.30 |
| 2026-06-16 12:00 |
17:32:51.87 |
+30:19:47.4 |
HIP 85921 |
12.74 |
| 2026-06-17 00:00 |
17:32:26.17 |
+30:16:45.6 |
HIP 85781 |
9.70 |
| 2026-06-17 12:00 |
17:32:00.52 |
+30:13:41.3 |
HIP 85781 |
6.65 |
| 2026-06-18 00:00 |
17:31:34.92 |
+30:10:34.7 |
HIP 85781 |
8.67 |
| 2026-06-18 12:00 |
17:31:09.38 |
+30:07:25.6 |
HIP 85781 |
13.69 |
| 2026-06-19 00:00 |
17:30:43.91 |
+30:04:14.2 |
HIP 85781 |
19.52 |
| 2026-06-19 12:00 |
17:30:18.49 |
+30:01:00.3 |
HIP 85781 |
25.63 |
| 2026-06-20 00:00 |
17:29:53.14 |
+29:57:44.1 |
HIP 85498 |
26.13 |
| 2026-06-20 12:00 |
17:29:27.86 |
+29:54:25.6 |
HIP 85498 |
24.88 |
| 2026-06-21 00:00 |
17:29:02.66 |
+29:51:04.7 |
HIP 85498 |
25.27 |
| 2026-06-21 12:00 |
17:28:37.52 |
+29:47:41.5 |
HIP 85579 |
25.18 |
| 2026-06-22 00:00 |
17:28:12.47 |
+29:44:16.0 |
HIP 85579 |
24.64 |