メタデータ
| 項目 |
値 |
| Designation |
C/2019 C1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-05-05T17:23:03.788160Z |
| Orbit solution date (soln_date, UTC) |
2021-08-06T00:42:31Z |
| Obs used |
739 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
9.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-02-05T11:02:21.926400Z |
| Discovery magnitude (MPC) |
17.75 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) |
2020-04-24.0000000 |
| e |
0.99209888 |
| q (au) |
6.581320 |
| a (au) |
832.959952 |
| i (deg) |
36.016489 |
| Ω (om, deg) |
212.397225 |
| ω (w, deg) |
319.189707 |
| M (ma, deg) |
359.999519 |
等級
散乱 + 全体線形
$$
M_a = (0.402 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
0.402 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
17:37:31.13 |
+07:49:29.3 |
HIP 86174 |
30.39 |
| 2026-06-01 12:00 |
17:37:24.93 |
+07:49:58.9 |
HIP 86174 |
30.16 |
| 2026-06-02 00:00 |
17:37:18.72 |
+07:50:28.0 |
HIP 86174 |
30.01 |
| 2026-06-02 12:00 |
17:37:12.49 |
+07:50:56.5 |
HIP 86174 |
29.93 |
| 2026-06-03 00:00 |
17:37:06.24 |
+07:51:24.6 |
HIP 86174 |
29.93 |
| 2026-06-03 12:00 |
17:36:59.98 |
+07:51:52.1 |
HIP 86174 |
30.01 |
| 2026-06-04 00:00 |
17:36:53.70 |
+07:52:19.0 |
HIP 86174 |
30.17 |
| 2026-06-04 12:00 |
17:36:47.41 |
+07:52:45.4 |
HIP 86174 |
30.40 |
| 2026-06-05 00:00 |
17:36:41.11 |
+07:53:11.3 |
HIP 86174 |
30.71 |
| 2026-06-05 12:00 |
17:36:34.79 |
+07:53:36.7 |
HIP 86174 |
31.09 |
| 2026-06-06 00:00 |
17:36:28.46 |
+07:54:01.5 |
HIP 86174 |
31.54 |
| 2026-06-06 12:00 |
17:36:22.13 |
+07:54:25.7 |
HIP 86174 |
32.06 |
| 2026-06-07 00:00 |
17:36:15.78 |
+07:54:49.4 |
HIP 86174 |
32.64 |
| 2026-06-07 12:00 |
17:36:09.42 |
+07:55:12.6 |
HIP 86174 |
33.28 |
| 2026-06-08 00:00 |
17:36:03.05 |
+07:55:35.2 |
HIP 85940 |
33.95 |
| 2026-06-08 12:00 |
17:35:56.67 |
+07:55:57.3 |
HIP 85940 |
32.34 |
| 2026-06-09 00:00 |
17:35:50.28 |
+07:56:18.8 |
HIP 85940 |
30.72 |
| 2026-06-09 12:00 |
17:35:43.89 |
+07:56:39.8 |
HIP 85940 |
29.11 |
| 2026-06-10 00:00 |
17:35:37.49 |
+07:57:00.2 |
HIP 85940 |
27.51 |
| 2026-06-10 12:00 |
17:35:31.08 |
+07:57:20.0 |
HIP 85940 |
25.90 |
| 2026-06-11 00:00 |
17:35:24.67 |
+07:57:39.3 |
HIP 85940 |
24.30 |
| 2026-06-11 12:00 |
17:35:18.26 |
+07:57:58.1 |
HIP 85940 |
22.71 |
| 2026-06-12 00:00 |
17:35:11.84 |
+07:58:16.3 |
HIP 85940 |
21.12 |
| 2026-06-12 12:00 |
17:35:05.42 |
+07:58:33.9 |
HIP 85940 |
19.54 |
| 2026-06-13 00:00 |
17:34:58.99 |
+07:58:51.0 |
HIP 85940 |
17.97 |
| 2026-06-13 12:00 |
17:34:52.57 |
+07:59:07.5 |
HIP 85940 |
16.41 |
| 2026-06-14 00:00 |
17:34:46.14 |
+07:59:23.4 |
HIP 85940 |
14.87 |
| 2026-06-14 12:00 |
17:34:39.71 |
+07:59:38.8 |
HIP 85940 |
13.35 |
| 2026-06-15 00:00 |
17:34:33.28 |
+07:59:53.6 |
HIP 85940 |
11.85 |
| 2026-06-15 12:00 |
17:34:26.86 |
+08:00:07.9 |
HIP 85940 |
10.40 |
| 2026-06-16 00:00 |
17:34:20.44 |
+08:00:21.6 |
HIP 85940 |
9.01 |
| 2026-06-16 12:00 |
17:34:14.02 |
+08:00:34.7 |
HIP 85940 |
7.71 |
| 2026-06-17 00:00 |
17:34:07.60 |
+08:00:47.3 |
HIP 85940 |
6.56 |
| 2026-06-17 12:00 |
17:34:01.19 |
+08:00:59.3 |
HIP 85940 |
5.64 |
| 2026-06-18 00:00 |
17:33:54.78 |
+08:01:10.7 |
HIP 85940 |
5.08 |
| 2026-06-18 12:00 |
17:33:48.38 |
+08:01:21.6 |
HIP 85940 |
5.00 |
| 2026-06-19 00:00 |
17:33:41.98 |
+08:01:32.0 |
HIP 85940 |
5.41 |
| 2026-06-19 12:00 |
17:33:35.60 |
+08:01:41.7 |
HIP 85940 |
6.23 |
| 2026-06-20 00:00 |
17:33:29.22 |
+08:01:50.9 |
HIP 85940 |
7.31 |
| 2026-06-20 12:00 |
17:33:22.84 |
+08:01:59.6 |
HIP 85940 |
8.55 |
| 2026-06-21 00:00 |
17:33:16.48 |
+08:02:07.7 |
HIP 85940 |
9.89 |
| 2026-06-21 12:00 |
17:33:10.13 |
+08:02:15.2 |
HIP 85940 |
11.29 |
| 2026-06-22 00:00 |
17:33:03.79 |
+08:02:22.2 |
HIP 85940 |
12.74 |