メタデータ
| 項目 |
値 |
| Designation |
C/2024 N3 (Sarneczky) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-04-11T09:48:03.090240Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:18Z |
| Obs used |
636 |
| 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) |
2025-04-08.0000000 |
| e |
1.00124850 |
| q (au) |
5.014578 |
| a (au) |
-4016.482367 |
| i (deg) |
88.728944 |
| Ω (om, deg) |
82.608468 |
| ω (w, deg) |
86.881568 |
| M (ma, deg) |
-0.000013 |
等級
散乱 + 全体線形
$$
M_a = (3.339 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.339 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
-6.078 |
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) |
| 2026-03-26 00:00 |
18:21:47.75 |
+30:48:56.5 |
HIP 89895 |
21.78 |
| 2026-03-26 12:00 |
18:21:45.31 |
+30:50:18.3 |
HIP 89895 |
20.47 |
| 2026-03-27 00:00 |
18:21:42.65 |
+30:51:40.2 |
HIP 89895 |
19.14 |
| 2026-03-27 12:00 |
18:21:39.77 |
+30:53:02.0 |
HIP 89895 |
17.80 |
| 2026-03-28 00:00 |
18:21:36.68 |
+30:54:23.8 |
HIP 89895 |
16.45 |
| 2026-03-28 12:00 |
18:21:33.37 |
+30:55:45.6 |
HIP 89895 |
15.09 |
| 2026-03-29 00:00 |
18:21:29.84 |
+30:57:07.2 |
HIP 89895 |
13.73 |
| 2026-03-29 12:00 |
18:21:26.10 |
+30:58:28.8 |
HIP 89895 |
12.38 |
| 2026-03-30 00:00 |
18:21:22.15 |
+30:59:50.3 |
HIP 89895 |
11.04 |
| 2026-03-30 12:00 |
18:21:17.97 |
+31:01:11.6 |
HIP 89895 |
9.75 |
| 2026-03-31 00:00 |
18:21:13.58 |
+31:02:32.9 |
HIP 89895 |
8.52 |
| 2026-03-31 12:00 |
18:21:08.97 |
+31:03:53.9 |
HIP 89895 |
7.40 |
| 2026-04-01 00:00 |
18:21:04.14 |
+31:05:14.7 |
HIP 89895 |
6.48 |
| 2026-04-01 12:00 |
18:20:59.09 |
+31:06:35.4 |
HIP 89895 |
5.88 |
| 2026-04-02 00:00 |
18:20:53.82 |
+31:07:55.8 |
HIP 89895 |
5.71 |
| 2026-04-02 12:00 |
18:20:48.34 |
+31:09:16.0 |
HIP 89895 |
6.04 |
| 2026-04-03 00:00 |
18:20:42.64 |
+31:10:35.9 |
HIP 89895 |
6.82 |
| 2026-04-03 12:00 |
18:20:36.71 |
+31:11:55.5 |
HIP 89895 |
7.93 |
| 2026-04-04 00:00 |
18:20:30.57 |
+31:13:14.9 |
HIP 89895 |
9.27 |
| 2026-04-04 12:00 |
18:20:24.20 |
+31:14:33.9 |
HIP 89819 |
9.54 |
| 2026-04-05 00:00 |
18:20:17.62 |
+31:15:52.5 |
HIP 89819 |
9.44 |
| 2026-04-05 12:00 |
18:20:10.82 |
+31:17:10.8 |
HIP 89819 |
9.69 |
| 2026-04-06 00:00 |
18:20:03.79 |
+31:18:28.8 |
HIP 89819 |
10.29 |
| 2026-04-06 12:00 |
18:19:56.55 |
+31:19:46.3 |
HIP 89819 |
11.20 |
| 2026-04-07 00:00 |
18:19:49.08 |
+31:21:03.3 |
HIP 89819 |
12.37 |
| 2026-04-07 12:00 |
18:19:41.39 |
+31:22:20.0 |
HIP 89819 |
13.74 |
| 2026-04-08 00:00 |
18:19:33.48 |
+31:23:36.1 |
HIP 89819 |
15.28 |
| 2026-04-08 12:00 |
18:19:25.35 |
+31:24:51.8 |
HIP 89819 |
16.95 |
| 2026-04-09 00:00 |
18:19:17.00 |
+31:26:06.9 |
HIP 89819 |
18.72 |
| 2026-04-09 12:00 |
18:19:08.42 |
+31:27:21.5 |
HIP 89819 |
20.59 |
| 2026-04-10 00:00 |
18:18:59.63 |
+31:28:35.6 |
HIP 89900 |
22.15 |
| 2026-04-10 12:00 |
18:18:50.61 |
+31:29:49.0 |
HIP 89900 |
23.78 |
| 2026-04-11 00:00 |
18:18:41.37 |
+31:31:01.9 |
HIP 89900 |
25.57 |
| 2026-04-11 12:00 |
18:18:31.91 |
+31:32:14.1 |
HIP 89900 |
27.47 |
| 2026-04-12 00:00 |
18:18:22.22 |
+31:33:25.7 |
HIP 89667 |
29.24 |
| 2026-04-12 12:00 |
18:18:12.32 |
+31:34:36.6 |
HIP 89667 |
27.69 |
| 2026-04-13 00:00 |
18:18:02.19 |
+31:35:46.8 |
HIP 89667 |
26.29 |
| 2026-04-13 12:00 |
18:17:51.84 |
+31:36:56.3 |
HIP 89667 |
25.06 |
| 2026-04-14 00:00 |
18:17:41.27 |
+31:38:05.0 |
HIP 89667 |
24.05 |
| 2026-04-14 12:00 |
18:17:30.48 |
+31:39:13.0 |
HIP 89667 |
23.28 |
| 2026-04-15 00:00 |
18:17:19.47 |
+31:40:20.1 |
HIP 89667 |
22.81 |
| 2026-04-15 12:00 |
18:17:08.24 |
+31:41:26.5 |
HIP 89667 |
22.65 |
| 2026-04-16 00:00 |
18:16:56.78 |
+31:42:32.0 |
HIP 89667 |
22.84 |