C/2019 K5 (Young)
メタデータ
| 項目 |
値 |
| Designation |
C/2019 K5 (Young) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-06-22T18:02:04.787520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:56Z |
| Obs used |
734 |
| NEO |
- |
| M1 |
12.100 |
| K1 |
9.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-05-25T14:10:08.054400Z |
| Discovery magnitude (MPC) |
17.10 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-09-13.0000000 |
| e |
0.98653488 |
| q (au) |
2.035047 |
| a (au) |
151.134694 |
| i (deg) |
15.315381 |
| Ω (om, deg) |
177.188411 |
| ω (w, deg) |
174.916616 |
| M (ma, deg) |
0.043630 |
等級
散乱 + 全体線形
$$
M_a = (11.210 + 4.027\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.210 |
| n |
4.027 |
| gf |
1.000 |
| gb |
-0.801 |
| k |
0.998 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
08:55:45.30 |
+05:47:21.0 |
HIP 43813 |
10.81 |
| 2026-02-03 12:00 |
08:55:39.22 |
+05:47:50.0 |
HIP 43813 |
9.70 |
| 2026-02-04 00:00 |
08:55:33.13 |
+05:48:19.2 |
HIP 43813 |
8.73 |
| 2026-02-04 12:00 |
08:55:27.05 |
+05:48:48.5 |
HIP 43813 |
7.97 |
| 2026-02-05 00:00 |
08:55:20.97 |
+05:49:18.0 |
HIP 43813 |
7.46 |
| 2026-02-05 12:00 |
08:55:14.91 |
+05:49:47.6 |
HIP 43813 |
7.27 |
| 2026-02-06 00:00 |
08:55:08.84 |
+05:50:17.3 |
HIP 43813 |
7.42 |
| 2026-02-06 12:00 |
08:55:02.79 |
+05:50:47.3 |
HIP 43813 |
7.89 |
| 2026-02-07 00:00 |
08:54:56.74 |
+05:51:17.3 |
HIP 43813 |
8.63 |
| 2026-02-07 12:00 |
08:54:50.71 |
+05:51:47.5 |
HIP 43813 |
9.57 |
| 2026-02-08 00:00 |
08:54:44.68 |
+05:52:17.9 |
HIP 43813 |
10.67 |
| 2026-02-08 12:00 |
08:54:38.66 |
+05:52:48.4 |
HIP 43813 |
11.86 |
| 2026-02-09 00:00 |
08:54:32.65 |
+05:53:19.0 |
HIP 43813 |
13.14 |
| 2026-02-09 12:00 |
08:54:26.65 |
+05:53:49.7 |
HIP 43813 |
14.48 |
| 2026-02-10 00:00 |
08:54:20.67 |
+05:54:20.6 |
HIP 43813 |
15.85 |
| 2026-02-10 12:00 |
08:54:14.69 |
+05:54:51.6 |
HIP 43813 |
17.26 |
| 2026-02-11 00:00 |
08:54:08.73 |
+05:55:22.7 |
HIP 43813 |
18.69 |
| 2026-02-11 12:00 |
08:54:02.79 |
+05:55:54.0 |
HIP 43813 |
20.13 |
| 2026-02-12 00:00 |
08:53:56.85 |
+05:56:25.4 |
HIP 43813 |
21.59 |
| 2026-02-12 12:00 |
08:53:50.94 |
+05:56:56.8 |
HIP 43813 |
23.06 |
| 2026-02-13 00:00 |
08:53:45.03 |
+05:57:28.4 |
HIP 43813 |
24.54 |
| 2026-02-13 12:00 |
08:53:39.14 |
+05:58:00.1 |
HIP 43813 |
26.03 |
| 2026-02-14 00:00 |
08:53:33.27 |
+05:58:31.9 |
HIP 43813 |
27.51 |
| 2026-02-14 12:00 |
08:53:27.42 |
+05:59:03.8 |
HIP 43813 |
29.00 |
| 2026-02-15 00:00 |
08:53:21.58 |
+05:59:35.8 |
HIP 43813 |
30.49 |
| 2026-02-15 12:00 |
08:53:15.76 |
+06:00:07.9 |
HIP 43813 |
31.99 |
| 2026-02-16 00:00 |
08:53:09.97 |
+06:00:40.1 |
HIP 43813 |
33.48 |
| 2026-02-16 12:00 |
08:53:04.19 |
+06:01:12.4 |
HIP 43813 |
34.97 |
| 2026-02-17 00:00 |
08:52:58.43 |
+06:01:44.8 |
HIP 43813 |
36.46 |
| 2026-02-17 12:00 |
08:52:52.69 |
+06:02:17.2 |
HIP 43813 |
37.95 |
| 2026-02-18 00:00 |
08:52:46.97 |
+06:02:49.8 |
HIP 43813 |
39.44 |
| 2026-02-18 12:00 |
08:52:41.27 |
+06:03:22.4 |
HIP 43813 |
40.92 |
| 2026-02-19 00:00 |
08:52:35.60 |
+06:03:55.0 |
HIP 43813 |
42.40 |
| 2026-02-19 12:00 |
08:52:29.95 |
+06:04:27.8 |
HIP 43813 |
43.88 |
| 2026-02-20 00:00 |
08:52:24.32 |
+06:05:00.6 |
HIP 43570 |
44.59 |
| 2026-02-20 12:00 |
08:52:18.72 |
+06:05:33.5 |
HIP 43362 |
44.45 |
| 2026-02-21 00:00 |
08:52:13.14 |
+06:06:06.4 |
HIP 43362 |
43.02 |
| 2026-02-21 12:00 |
08:52:07.58 |
+06:06:39.4 |
HIP 43362 |
41.60 |
| 2026-02-22 00:00 |
08:52:02.06 |
+06:07:12.4 |
HIP 43362 |
40.19 |
| 2026-02-22 12:00 |
08:51:56.55 |
+06:07:45.5 |
HIP 43362 |
38.78 |
| 2026-02-23 00:00 |
08:51:51.08 |
+06:08:18.7 |
HIP 43362 |
37.39 |
| 2026-02-23 12:00 |
08:51:45.63 |
+06:08:51.9 |
HIP 43362 |
36.01 |
| 2026-02-24 00:00 |
08:51:40.21 |
+06:09:25.1 |
HIP 43362 |
34.64 |