C/2019 K1 (ATLAS)
メタデータ
| 項目 |
値 |
| Designation |
C/2019 K1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-02-12T20:54:28.042560Z |
| Orbit solution date (soln_date, UTC) |
2022-07-19T01:12:15Z |
| Obs used |
274 |
| NEO |
- |
| M1 |
13.200 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-05-16T11:34:46.531200Z |
| Discovery magnitude (MPC) |
17.18 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) |
2019-06-12.0000000 |
| e |
1.00056186 |
| q (au) |
2.012738 |
| a (au) |
-3582.254853 |
| i (deg) |
87.157348 |
| Ω (om, deg) |
73.377584 |
| ω (w, deg) |
265.682376 |
| M (ma, deg) |
-0.001130 |
等級
散乱 + 全体線形
$$
M_a = (15.125 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.125 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.684 |
| k |
0.800 |
| 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 |
03:44:11.18 |
+67:38:36.5 |
HIP 17585 |
28.51 |
| 2026-02-03 12:00 |
03:44:06.07 |
+67:37:25.9 |
HIP 17585 |
27.61 |
| 2026-02-04 00:00 |
03:44:01.12 |
+67:36:15.3 |
HIP 17585 |
26.74 |
| 2026-02-04 12:00 |
03:43:56.35 |
+67:35:04.8 |
HIP 17585 |
25.89 |
| 2026-02-05 00:00 |
03:43:51.74 |
+67:33:54.3 |
HIP 17585 |
25.08 |
| 2026-02-05 12:00 |
03:43:47.31 |
+67:32:43.8 |
HIP 17585 |
24.29 |
| 2026-02-06 00:00 |
03:43:43.05 |
+67:31:33.4 |
HIP 17585 |
23.53 |
| 2026-02-06 12:00 |
03:43:38.95 |
+67:30:23.1 |
HIP 17585 |
22.81 |
| 2026-02-07 00:00 |
03:43:35.03 |
+67:29:12.8 |
HIP 17585 |
22.13 |
| 2026-02-07 12:00 |
03:43:31.27 |
+67:28:02.6 |
HIP 17585 |
21.48 |
| 2026-02-08 00:00 |
03:43:27.69 |
+67:26:52.5 |
HIP 17585 |
20.87 |
| 2026-02-08 12:00 |
03:43:24.27 |
+67:25:42.5 |
HIP 17585 |
20.31 |
| 2026-02-09 00:00 |
03:43:21.02 |
+67:24:32.6 |
HIP 17585 |
19.80 |
| 2026-02-09 12:00 |
03:43:17.94 |
+67:23:22.8 |
HIP 17585 |
19.34 |
| 2026-02-10 00:00 |
03:43:15.02 |
+67:22:13.1 |
HIP 17585 |
18.93 |
| 2026-02-10 12:00 |
03:43:12.27 |
+67:21:03.5 |
HIP 17585 |
18.57 |
| 2026-02-11 00:00 |
03:43:09.69 |
+67:19:54.0 |
HIP 17585 |
18.28 |
| 2026-02-11 12:00 |
03:43:07.27 |
+67:18:44.7 |
HIP 17585 |
18.04 |
| 2026-02-12 00:00 |
03:43:05.02 |
+67:17:35.5 |
HIP 17585 |
17.86 |
| 2026-02-12 12:00 |
03:43:02.93 |
+67:16:26.5 |
HIP 17585 |
17.74 |
| 2026-02-13 00:00 |
03:43:01.01 |
+67:15:17.6 |
HIP 17585 |
17.69 |
| 2026-02-13 12:00 |
03:42:59.25 |
+67:14:08.9 |
HIP 17585 |
17.69 |
| 2026-02-14 00:00 |
03:42:57.65 |
+67:13:00.3 |
HIP 17585 |
17.76 |
| 2026-02-14 12:00 |
03:42:56.22 |
+67:11:52.0 |
HIP 17585 |
17.89 |
| 2026-02-15 00:00 |
03:42:54.95 |
+67:10:43.8 |
HIP 17585 |
18.07 |
| 2026-02-15 12:00 |
03:42:53.84 |
+67:09:35.8 |
HIP 17585 |
18.30 |
| 2026-02-16 00:00 |
03:42:52.89 |
+67:08:27.9 |
HIP 17585 |
18.59 |
| 2026-02-16 12:00 |
03:42:52.11 |
+67:07:20.3 |
HIP 17585 |
18.92 |
| 2026-02-17 00:00 |
03:42:51.48 |
+67:06:12.9 |
HIP 17585 |
19.30 |
| 2026-02-17 12:00 |
03:42:51.01 |
+67:05:05.7 |
HIP 17585 |
19.72 |
| 2026-02-18 00:00 |
03:42:50.70 |
+67:03:58.7 |
HIP 17585 |
20.18 |
| 2026-02-18 12:00 |
03:42:50.55 |
+67:02:52.0 |
HIP 17585 |
20.67 |
| 2026-02-19 00:00 |
03:42:50.56 |
+67:01:45.4 |
HIP 17585 |
21.20 |
| 2026-02-19 12:00 |
03:42:50.72 |
+67:00:39.2 |
HIP 17585 |
21.75 |
| 2026-02-20 00:00 |
03:42:51.04 |
+66:59:33.1 |
HIP 17585 |
22.33 |
| 2026-02-20 12:00 |
03:42:51.52 |
+66:58:27.3 |
HIP 17176 |
22.57 |
| 2026-02-21 00:00 |
03:42:52.14 |
+66:57:21.8 |
HIP 17176 |
21.71 |
| 2026-02-21 12:00 |
03:42:52.93 |
+66:56:16.5 |
HIP 17176 |
20.89 |
| 2026-02-22 00:00 |
03:42:53.86 |
+66:55:11.5 |
HIP 17176 |
20.10 |
| 2026-02-22 12:00 |
03:42:54.95 |
+66:54:06.8 |
HIP 17176 |
19.36 |
| 2026-02-23 00:00 |
03:42:56.19 |
+66:53:02.3 |
HIP 17176 |
18.66 |
| 2026-02-23 12:00 |
03:42:57.58 |
+66:51:58.2 |
HIP 17176 |
18.02 |
| 2026-02-24 00:00 |
03:42:59.12 |
+66:50:54.3 |
HIP 17176 |
17.43 |