メタデータ
| 項目 |
値 |
| Designation |
P/2021 J3 (ATLAS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-07-03T16:55:29.046720Z |
| Orbit solution date (soln_date, UTC) |
2024-03-19T12:13:27Z |
| Obs used |
145 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
10.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-05-13T13:05:15.216000Z |
| Discovery magnitude (MPC) |
18.64 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) |
2021-07-10.0000000 |
| e |
0.45076663 |
| q (au) |
4.906343 |
| a (au) |
8.933076 |
| i (deg) |
14.570678 |
| Ω (om, deg) |
111.238530 |
| ω (w, deg) |
125.692921 |
| M (ma, deg) |
27.217217 |
等級
散乱 + 全体線形
$$
M_a = (2.613 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.613 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.969 |
| 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 |
01:32:03.78 |
-05:05:07.3 |
HIP 7124 |
8.59 |
| 2026-06-01 12:00 |
01:32:12.95 |
-05:04:42.6 |
HIP 7124 |
9.57 |
| 2026-06-02 00:00 |
01:32:22.07 |
-05:04:18.5 |
HIP 7124 |
10.95 |
| 2026-06-02 12:00 |
01:32:31.14 |
-05:03:55.0 |
HIP 7124 |
12.60 |
| 2026-06-03 00:00 |
01:32:40.16 |
-05:03:32.0 |
HIP 7124 |
14.42 |
| 2026-06-03 12:00 |
01:32:49.12 |
-05:03:09.5 |
HIP 7124 |
16.34 |
| 2026-06-04 00:00 |
01:32:58.04 |
-05:02:47.5 |
HIP 7124 |
18.34 |
| 2026-06-04 12:00 |
01:33:06.90 |
-05:02:26.1 |
HIP 7124 |
20.37 |
| 2026-06-05 00:00 |
01:33:15.71 |
-05:02:05.2 |
HIP 7124 |
22.44 |
| 2026-06-05 12:00 |
01:33:24.47 |
-05:01:44.9 |
HIP 7124 |
24.52 |
| 2026-06-06 00:00 |
01:33:33.17 |
-05:01:25.1 |
HIP 7124 |
26.60 |
| 2026-06-06 12:00 |
01:33:41.82 |
-05:01:05.8 |
HIP 7124 |
28.70 |
| 2026-06-07 00:00 |
01:33:50.42 |
-05:00:47.1 |
HIP 7427 |
27.78 |
| 2026-06-07 12:00 |
01:33:58.96 |
-05:00:29.0 |
HIP 7427 |
25.73 |
| 2026-06-08 00:00 |
01:34:07.45 |
-05:00:11.4 |
HIP 7427 |
23.70 |
| 2026-06-08 12:00 |
01:34:15.88 |
-04:59:54.3 |
HIP 7427 |
21.70 |
| 2026-06-09 00:00 |
01:34:24.26 |
-04:59:37.8 |
HIP 7427 |
19.74 |
| 2026-06-09 12:00 |
01:34:32.57 |
-04:59:21.8 |
HIP 7427 |
17.82 |
| 2026-06-10 00:00 |
01:34:40.84 |
-04:59:06.4 |
HIP 7427 |
15.95 |
| 2026-06-10 12:00 |
01:34:49.04 |
-04:58:51.6 |
HIP 7427 |
14.15 |
| 2026-06-11 00:00 |
01:34:57.19 |
-04:58:37.3 |
HIP 7427 |
12.44 |
| 2026-06-11 12:00 |
01:35:05.28 |
-04:58:23.6 |
HIP 7427 |
10.86 |
| 2026-06-12 00:00 |
01:35:13.31 |
-04:58:10.4 |
HIP 7427 |
9.44 |
| 2026-06-12 12:00 |
01:35:21.28 |
-04:57:57.8 |
HIP 7427 |
8.28 |
| 2026-06-13 00:00 |
01:35:29.19 |
-04:57:45.7 |
HIP 7427 |
7.48 |
| 2026-06-13 12:00 |
01:35:37.04 |
-04:57:34.2 |
HIP 7427 |
7.14 |
| 2026-06-14 00:00 |
01:35:44.83 |
-04:57:23.3 |
HIP 7427 |
7.33 |
| 2026-06-14 12:00 |
01:35:52.56 |
-04:57:12.9 |
HIP 7427 |
7.98 |
| 2026-06-15 00:00 |
01:36:00.23 |
-04:57:03.1 |
HIP 7427 |
8.99 |
| 2026-06-15 12:00 |
01:36:07.83 |
-04:56:53.9 |
HIP 7427 |
10.25 |
| 2026-06-16 00:00 |
01:36:15.38 |
-04:56:45.2 |
HIP 7427 |
11.66 |
| 2026-06-16 12:00 |
01:36:22.86 |
-04:56:37.1 |
HIP 7427 |
13.18 |
| 2026-06-17 00:00 |
01:36:30.28 |
-04:56:29.6 |
HIP 7427 |
14.75 |
| 2026-06-17 12:00 |
01:36:37.63 |
-04:56:22.6 |
HIP 7427 |
16.37 |
| 2026-06-18 00:00 |
01:36:44.92 |
-04:56:16.2 |
HIP 7427 |
18.01 |
| 2026-06-18 12:00 |
01:36:52.15 |
-04:56:10.4 |
HIP 7427 |
19.66 |
| 2026-06-19 00:00 |
01:36:59.31 |
-04:56:05.1 |
HIP 7427 |
21.32 |
| 2026-06-19 12:00 |
01:37:06.40 |
-04:56:00.4 |
HIP 7659 |
22.87 |
| 2026-06-20 00:00 |
01:37:13.43 |
-04:55:56.2 |
HIP 7659 |
21.13 |
| 2026-06-20 12:00 |
01:37:20.40 |
-04:55:52.7 |
HIP 7659 |
19.42 |
| 2026-06-21 00:00 |
01:37:27.29 |
-04:55:49.7 |
HIP 7659 |
17.72 |
| 2026-06-21 12:00 |
01:37:34.13 |
-04:55:47.2 |
HIP 7659 |
16.04 |
| 2026-06-22 00:00 |
01:37:40.89 |
-04:55:45.4 |
HIP 7659 |
14.39 |