C/2019 J3 (ATLAS)
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) |
| 2026-02-03 00:00 |
07:29:41.59 |
+42:46:02.8 |
HIP 36317 |
12.73 |
| 2026-02-03 12:00 |
07:29:31.79 |
+42:45:53.4 |
HIP 36317 |
10.93 |
| 2026-02-04 00:00 |
07:29:22.04 |
+42:45:43.5 |
HIP 36317 |
9.13 |
| 2026-02-04 12:00 |
07:29:12.33 |
+42:45:33.3 |
HIP 36317 |
7.34 |
| 2026-02-05 00:00 |
07:29:02.66 |
+42:45:22.6 |
HIP 36317 |
5.56 |
| 2026-02-05 12:00 |
07:28:53.04 |
+42:45:11.5 |
HIP 36317 |
3.79 |
| 2026-02-06 00:00 |
07:28:43.46 |
+42:45:00.1 |
HIP 36317 |
2.03 |
| 2026-02-06 12:00 |
07:28:33.93 |
+42:44:48.2 |
HIP 36317 |
0.41 |
| 2026-02-07 00:00 |
07:28:24.44 |
+42:44:36.0 |
HIP 36315 |
1.38 |
| 2026-02-07 12:00 |
07:28:15.00 |
+42:44:23.3 |
HIP 36315 |
3.10 |
| 2026-02-08 00:00 |
07:28:05.61 |
+42:44:10.3 |
HIP 36315 |
4.83 |
| 2026-02-08 12:00 |
07:27:56.26 |
+42:43:56.9 |
HIP 36315 |
6.55 |
| 2026-02-09 00:00 |
07:27:46.97 |
+42:43:43.0 |
HIP 36315 |
8.27 |
| 2026-02-09 12:00 |
07:27:37.72 |
+42:43:28.8 |
HIP 36315 |
9.99 |
| 2026-02-10 00:00 |
07:27:28.53 |
+42:43:14.2 |
HIP 36315 |
11.69 |
| 2026-02-10 12:00 |
07:27:19.39 |
+42:42:59.3 |
HIP 36315 |
13.39 |
| 2026-02-11 00:00 |
07:27:10.30 |
+42:42:43.9 |
HIP 36315 |
15.08 |
| 2026-02-11 12:00 |
07:27:01.26 |
+42:42:28.2 |
HIP 36315 |
16.76 |
| 2026-02-12 00:00 |
07:26:52.28 |
+42:42:12.1 |
HIP 36315 |
18.43 |
| 2026-02-12 12:00 |
07:26:43.35 |
+42:41:55.6 |
HIP 36315 |
20.09 |
| 2026-02-13 00:00 |
07:26:34.47 |
+42:41:38.7 |
HIP 36018 |
21.23 |
| 2026-02-13 12:00 |
07:26:25.65 |
+42:41:21.5 |
HIP 36018 |
20.48 |
| 2026-02-14 00:00 |
07:26:16.89 |
+42:41:03.9 |
HIP 36018 |
19.84 |
| 2026-02-14 12:00 |
07:26:08.19 |
+42:40:45.9 |
HIP 36018 |
19.34 |
| 2026-02-15 00:00 |
07:25:59.54 |
+42:40:27.5 |
HIP 36018 |
18.96 |
| 2026-02-15 12:00 |
07:25:50.95 |
+42:40:08.8 |
HIP 36018 |
18.74 |
| 2026-02-16 00:00 |
07:25:42.42 |
+42:39:49.8 |
HIP 36018 |
18.65 |
| 2026-02-16 12:00 |
07:25:33.95 |
+42:39:30.3 |
HIP 36018 |
18.71 |
| 2026-02-17 00:00 |
07:25:25.54 |
+42:39:10.5 |
HIP 36018 |
18.91 |
| 2026-02-17 12:00 |
07:25:17.19 |
+42:38:50.4 |
HIP 36018 |
19.24 |
| 2026-02-18 00:00 |
07:25:08.90 |
+42:38:29.9 |
HIP 36018 |
19.69 |
| 2026-02-18 12:00 |
07:25:00.67 |
+42:38:09.1 |
HIP 36018 |
20.26 |
| 2026-02-19 00:00 |
07:24:52.51 |
+42:37:47.9 |
HIP 36018 |
20.93 |
| 2026-02-19 12:00 |
07:24:44.41 |
+42:37:26.4 |
HIP 36018 |
21.70 |
| 2026-02-20 00:00 |
07:24:36.38 |
+42:37:04.5 |
HIP 35770 |
20.81 |
| 2026-02-20 12:00 |
07:24:28.41 |
+42:36:42.3 |
HIP 35770 |
19.42 |
| 2026-02-21 00:00 |
07:24:20.50 |
+42:36:19.7 |
HIP 35770 |
18.06 |
| 2026-02-21 12:00 |
07:24:12.66 |
+42:35:56.8 |
HIP 35770 |
16.73 |
| 2026-02-22 00:00 |
07:24:04.89 |
+42:35:33.6 |
HIP 35770 |
15.45 |
| 2026-02-22 12:00 |
07:23:57.18 |
+42:35:10.1 |
HIP 35770 |
14.22 |
| 2026-02-23 00:00 |
07:23:49.54 |
+42:34:46.2 |
HIP 35770 |
13.05 |
| 2026-02-23 12:00 |
07:23:41.96 |
+42:34:22.0 |
HIP 35770 |
11.97 |
| 2026-02-24 00:00 |
07:23:34.46 |
+42:33:57.5 |
HIP 35770 |
10.97 |