メタデータ
| 項目 |
値 |
| Designation |
C/2019 J3 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-08-01T21:21:25.338240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:54Z |
| Obs used |
270 |
| NEO |
- |
| M1 |
15.300 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-05-14T13:01:15.024000Z |
| Discovery magnitude (MPC) |
18.73 o |
| Discovery observatory (MPC) |
T05 · ATLAS-HKO, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-07-10.0000000 |
| e |
1.00067795 |
| q (au) |
2.373522 |
| a (au) |
-3501.039615 |
| i (deg) |
131.414908 |
| Ω (om, deg) |
270.517035 |
| ω (w, deg) |
16.552399 |
| M (ma, deg) |
-0.000109 |
等級
散乱 + 全体線形
$$
M_a = (14.286 + 2.429\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.286 |
| n |
2.429 |
| gf |
0.947 |
| gb |
-0.898 |
| k |
0.999 |
| δ90 |
1.000 |
| 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) |
| 2026-05-12 00:00 |
07:19:17.42 |
+40:58:25.5 |
HIP 35341 |
15.20 |
| 2026-05-12 12:00 |
07:19:21.13 |
+40:57:46.3 |
HIP 35341 |
15.65 |
| 2026-05-13 00:00 |
07:19:24.90 |
+40:57:07.2 |
HIP 35527 |
15.24 |
| 2026-05-13 12:00 |
07:19:28.73 |
+40:56:28.2 |
HIP 35527 |
14.37 |
| 2026-05-14 00:00 |
07:19:32.61 |
+40:55:49.3 |
HIP 35527 |
13.51 |
| 2026-05-14 12:00 |
07:19:36.54 |
+40:55:10.5 |
HIP 35527 |
12.66 |
| 2026-05-15 00:00 |
07:19:40.52 |
+40:54:31.8 |
HIP 35527 |
11.84 |
| 2026-05-15 12:00 |
07:19:44.56 |
+40:53:53.2 |
HIP 35527 |
11.04 |
| 2026-05-16 00:00 |
07:19:48.64 |
+40:53:14.7 |
HIP 35527 |
10.27 |
| 2026-05-16 12:00 |
07:19:52.78 |
+40:52:36.3 |
HIP 35527 |
9.56 |
| 2026-05-17 00:00 |
07:19:56.97 |
+40:51:57.9 |
HIP 35527 |
8.90 |
| 2026-05-17 12:00 |
07:20:01.21 |
+40:51:19.7 |
HIP 35527 |
8.32 |
| 2026-05-18 00:00 |
07:20:05.50 |
+40:50:41.6 |
HIP 35527 |
7.83 |
| 2026-05-18 12:00 |
07:20:09.84 |
+40:50:03.6 |
HIP 35527 |
7.46 |
| 2026-05-19 00:00 |
07:20:14.23 |
+40:49:25.6 |
HIP 35527 |
7.23 |
| 2026-05-19 12:00 |
07:20:18.67 |
+40:48:47.8 |
HIP 35527 |
7.15 |
| 2026-05-20 00:00 |
07:20:23.15 |
+40:48:10.1 |
HIP 35527 |
7.23 |
| 2026-05-20 12:00 |
07:20:27.69 |
+40:47:32.5 |
HIP 35527 |
7.47 |
| 2026-05-21 00:00 |
07:20:32.26 |
+40:46:55.1 |
HIP 35527 |
7.86 |
| 2026-05-21 12:00 |
07:20:36.89 |
+40:46:17.7 |
HIP 35527 |
8.37 |
| 2026-05-22 00:00 |
07:20:41.56 |
+40:45:40.5 |
HIP 35527 |
9.00 |
| 2026-05-22 12:00 |
07:20:46.28 |
+40:45:03.3 |
HIP 35527 |
9.71 |
| 2026-05-23 00:00 |
07:20:51.04 |
+40:44:26.3 |
HIP 35527 |
10.50 |
| 2026-05-23 12:00 |
07:20:55.85 |
+40:43:49.4 |
HIP 35527 |
11.35 |
| 2026-05-24 00:00 |
07:21:00.70 |
+40:43:12.6 |
HIP 35527 |
12.24 |
| 2026-05-24 12:00 |
07:21:05.60 |
+40:42:36.0 |
HIP 35527 |
13.18 |
| 2026-05-25 00:00 |
07:21:10.53 |
+40:41:59.4 |
HIP 35527 |
14.15 |
| 2026-05-25 12:00 |
07:21:15.51 |
+40:41:23.0 |
HIP 35527 |
15.14 |
| 2026-05-26 00:00 |
07:21:20.54 |
+40:40:46.7 |
HIP 35527 |
16.17 |
| 2026-05-26 12:00 |
07:21:25.60 |
+40:40:10.6 |
HIP 35527 |
17.21 |
| 2026-05-27 00:00 |
07:21:30.71 |
+40:39:34.5 |
HIP 35527 |
18.27 |
| 2026-05-27 12:00 |
07:21:35.86 |
+40:38:58.6 |
HIP 35811 |
17.83 |
| 2026-05-28 00:00 |
07:21:41.04 |
+40:38:22.9 |
HIP 35811 |
16.98 |
| 2026-05-28 12:00 |
07:21:46.27 |
+40:37:47.2 |
HIP 35811 |
16.15 |
| 2026-05-29 00:00 |
07:21:51.54 |
+40:37:11.7 |
HIP 35811 |
15.37 |
| 2026-05-29 12:00 |
07:21:56.84 |
+40:36:36.3 |
HIP 35811 |
14.62 |
| 2026-05-30 00:00 |
07:22:02.19 |
+40:36:01.1 |
HIP 35811 |
13.93 |
| 2026-05-30 12:00 |
07:22:07.57 |
+40:35:25.9 |
HIP 35811 |
13.29 |
| 2026-05-31 00:00 |
07:22:12.99 |
+40:34:51.0 |
HIP 35811 |
12.73 |
| 2026-05-31 12:00 |
07:22:18.45 |
+40:34:16.1 |
HIP 35811 |
12.24 |
| 2026-06-01 00:00 |
07:22:23.95 |
+40:33:41.4 |
HIP 35811 |
11.85 |
| 2026-06-01 12:00 |
07:22:29.48 |
+40:33:06.8 |
HIP 35811 |
11.56 |
| 2026-06-02 00:00 |
07:22:35.05 |
+40:32:32.4 |
HIP 35811 |
11.39 |