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) |
| 2026-03-26 00:00 |
09:54:55.46 |
+30:15:20.6 |
HIP 48572 |
26.83 |
| 2026-03-26 12:00 |
09:54:42.57 |
+30:13:05.4 |
HIP 48572 |
28.49 |
| 2026-03-27 00:00 |
09:54:29.85 |
+30:10:49.3 |
HIP 48572 |
30.51 |
| 2026-03-27 12:00 |
09:54:17.29 |
+30:08:32.2 |
HIP 48424 |
29.32 |
| 2026-03-28 00:00 |
09:54:04.91 |
+30:06:14.3 |
HIP 48424 |
28.35 |
| 2026-03-28 12:00 |
09:53:52.70 |
+30:03:55.5 |
HIP 48424 |
27.83 |
| 2026-03-29 00:00 |
09:53:40.66 |
+30:01:35.7 |
HIP 48424 |
27.78 |
| 2026-03-29 12:00 |
09:53:28.79 |
+29:59:15.1 |
HIP 48424 |
28.20 |
| 2026-03-30 00:00 |
09:53:17.09 |
+29:56:53.6 |
HIP 48424 |
29.06 |
| 2026-03-30 12:00 |
09:53:05.57 |
+29:54:31.3 |
HIP 48387 |
30.07 |
| 2026-03-31 00:00 |
09:52:54.22 |
+29:52:08.1 |
HIP 48387 |
30.92 |
| 2026-03-31 12:00 |
09:52:43.05 |
+29:49:44.0 |
HIP 48387 |
32.15 |
| 2026-04-01 00:00 |
09:52:32.05 |
+29:47:19.1 |
HIP 48387 |
33.69 |
| 2026-04-01 12:00 |
09:52:21.23 |
+29:44:53.4 |
HIP 48387 |
35.52 |
| 2026-04-02 00:00 |
09:52:10.58 |
+29:42:26.9 |
HIP 48387 |
37.58 |
| 2026-04-02 12:00 |
09:52:00.11 |
+29:39:59.6 |
HIP 48544 |
38.09 |
| 2026-04-03 00:00 |
09:51:49.82 |
+29:37:31.4 |
HIP 48160 |
38.04 |
| 2026-04-03 12:00 |
09:51:39.71 |
+29:35:02.5 |
HIP 48160 |
35.39 |
| 2026-04-04 00:00 |
09:51:29.77 |
+29:32:32.9 |
HIP 48160 |
32.90 |
| 2026-04-04 12:00 |
09:51:20.02 |
+29:30:02.4 |
HIP 48160 |
30.60 |
| 2026-04-05 00:00 |
09:51:10.44 |
+29:27:31.2 |
HIP 48160 |
28.53 |
| 2026-04-05 12:00 |
09:51:01.04 |
+29:24:59.2 |
HIP 48160 |
26.73 |
| 2026-04-06 00:00 |
09:50:51.82 |
+29:22:26.5 |
HIP 48160 |
25.28 |
| 2026-04-06 12:00 |
09:50:42.78 |
+29:19:53.1 |
HIP 48342 |
23.86 |
| 2026-04-07 00:00 |
09:50:33.92 |
+29:17:18.9 |
HIP 48342 |
22.13 |
| 2026-04-07 12:00 |
09:50:25.23 |
+29:14:44.1 |
HIP 48342 |
20.72 |
| 2026-04-08 00:00 |
09:50:16.74 |
+29:12:08.5 |
HIP 48342 |
19.70 |
| 2026-04-08 12:00 |
09:50:08.42 |
+29:09:32.2 |
HIP 48342 |
19.12 |
| 2026-04-09 00:00 |
09:50:00.28 |
+29:06:55.2 |
HIP 48342 |
19.03 |
| 2026-04-09 12:00 |
09:49:52.32 |
+29:04:17.6 |
HIP 48342 |
19.42 |
| 2026-04-10 00:00 |
09:49:44.55 |
+29:01:39.3 |
HIP 48342 |
20.25 |
| 2026-04-10 12:00 |
09:49:36.95 |
+28:59:00.3 |
HIP 48342 |
21.48 |
| 2026-04-11 00:00 |
09:49:29.54 |
+28:56:20.7 |
HIP 48342 |
23.03 |
| 2026-04-11 12:00 |
09:49:22.31 |
+28:53:40.4 |
HIP 48342 |
24.84 |
| 2026-04-12 00:00 |
09:49:15.26 |
+28:50:59.4 |
HIP 48093 |
23.07 |
| 2026-04-12 12:00 |
09:49:08.40 |
+28:48:17.9 |
HIP 48093 |
19.99 |
| 2026-04-13 00:00 |
09:49:01.71 |
+28:45:35.7 |
HIP 48093 |
16.92 |
| 2026-04-13 12:00 |
09:48:55.21 |
+28:42:52.9 |
HIP 48093 |
13.87 |
| 2026-04-14 00:00 |
09:48:48.89 |
+28:40:09.5 |
HIP 48093 |
10.84 |
| 2026-04-14 12:00 |
09:48:42.75 |
+28:37:25.5 |
HIP 48093 |
7.85 |
| 2026-04-15 00:00 |
09:48:36.79 |
+28:34:40.9 |
HIP 48093 |
4.95 |
| 2026-04-15 12:00 |
09:48:31.02 |
+28:31:55.7 |
HIP 48093 |
2.46 |
| 2026-04-16 00:00 |
09:48:25.43 |
+28:29:10.0 |
HIP 48093 |
2.46 |