P/2019 A1 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
P/2019 A1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-10-11T01:01:39.613440Z |
| Orbit solution date (soln_date, UTC) |
2021-05-31T22:43:01Z |
| Obs used |
63 |
| NEO |
- |
| M1 |
17.300 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-01-03T15:02:41.568000Z |
| Discovery magnitude (MPC) |
20.50 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-01-18.0000000 |
| e |
0.56892834 |
| q (au) |
2.211667 |
| a (au) |
5.130625 |
| i (deg) |
13.743622 |
| Ω (om, deg) |
312.299496 |
| ω (w, deg) |
150.846750 |
| M (ma, deg) |
8.392589 |
等級
散乱 + 全体線形
$$
M_a = (19.446 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.446 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.718 |
| 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 |
20:16:49.98 |
-22:29:07.6 |
HIP 100053 |
16.60 |
| 2026-02-03 12:00 |
20:17:07.72 |
-22:28:01.0 |
HIP 100053 |
13.63 |
| 2026-02-04 00:00 |
20:17:25.44 |
-22:26:54.4 |
HIP 100053 |
11.48 |
| 2026-02-04 12:00 |
20:17:43.14 |
-22:25:47.8 |
HIP 100053 |
10.67 |
| 2026-02-05 00:00 |
20:18:00.82 |
-22:24:41.2 |
HIP 100053 |
11.48 |
| 2026-02-05 12:00 |
20:18:18.47 |
-22:23:34.7 |
HIP 100053 |
13.62 |
| 2026-02-06 00:00 |
20:18:36.10 |
-22:22:28.2 |
HIP 100053 |
16.58 |
| 2026-02-06 12:00 |
20:18:53.71 |
-22:21:21.6 |
HIP 100181 |
14.32 |
| 2026-02-07 00:00 |
20:19:11.29 |
-22:20:15.2 |
HIP 100181 |
12.60 |
| 2026-02-07 12:00 |
20:19:28.84 |
-22:19:08.7 |
HIP 100181 |
12.15 |
| 2026-02-08 00:00 |
20:19:46.37 |
-22:18:02.3 |
HIP 100257 |
11.14 |
| 2026-02-08 12:00 |
20:20:03.87 |
-22:16:55.9 |
HIP 100257 |
9.45 |
| 2026-02-09 00:00 |
20:20:21.35 |
-22:15:49.5 |
HIP 100257 |
9.47 |
| 2026-02-09 12:00 |
20:20:38.79 |
-22:14:43.2 |
HIP 100257 |
11.18 |
| 2026-02-10 00:00 |
20:20:56.21 |
-22:13:36.9 |
HIP 100257 |
13.98 |
| 2026-02-10 12:00 |
20:21:13.59 |
-22:12:30.6 |
HIP 100257 |
17.34 |
| 2026-02-11 00:00 |
20:21:30.95 |
-22:11:24.4 |
HIP 100257 |
20.98 |
| 2026-02-11 12:00 |
20:21:48.27 |
-22:10:18.3 |
HIP 100257 |
24.79 |
| 2026-02-12 00:00 |
20:22:05.57 |
-22:09:12.2 |
HIP 100257 |
28.68 |
| 2026-02-12 12:00 |
20:22:22.83 |
-22:08:06.1 |
HIP 100637 |
27.91 |
| 2026-02-13 00:00 |
20:22:40.05 |
-22:07:00.1 |
HIP 100637 |
23.79 |
| 2026-02-13 12:00 |
20:22:57.24 |
-22:05:54.2 |
HIP 100637 |
19.69 |
| 2026-02-14 00:00 |
20:23:14.40 |
-22:04:48.3 |
HIP 100637 |
15.60 |
| 2026-02-14 12:00 |
20:23:31.52 |
-22:03:42.5 |
HIP 100637 |
11.55 |
| 2026-02-15 00:00 |
20:23:48.61 |
-22:02:36.8 |
HIP 100637 |
7.57 |
| 2026-02-15 12:00 |
20:24:05.65 |
-22:01:31.1 |
HIP 100637 |
3.89 |
| 2026-02-16 00:00 |
20:24:22.66 |
-22:00:25.5 |
HIP 100637 |
2.55 |
| 2026-02-16 12:00 |
20:24:39.64 |
-21:59:20.0 |
HIP 100637 |
5.59 |
| 2026-02-17 00:00 |
20:24:56.57 |
-21:58:14.5 |
HIP 100637 |
9.44 |
| 2026-02-17 12:00 |
20:25:13.46 |
-21:57:09.2 |
HIP 100637 |
13.42 |
| 2026-02-18 00:00 |
20:25:30.31 |
-21:56:03.9 |
HIP 100637 |
17.43 |
| 2026-02-18 12:00 |
20:25:47.12 |
-21:54:58.7 |
HIP 100879 |
20.79 |
| 2026-02-19 00:00 |
20:26:03.88 |
-21:53:53.6 |
HIP 100879 |
17.26 |
| 2026-02-19 12:00 |
20:26:20.61 |
-21:52:48.6 |
HIP 100879 |
14.01 |
| 2026-02-20 00:00 |
20:26:37.29 |
-21:51:43.7 |
HIP 100879 |
11.28 |
| 2026-02-20 12:00 |
20:26:53.92 |
-21:50:39.0 |
HIP 100879 |
9.53 |
| 2026-02-21 00:00 |
20:27:10.51 |
-21:49:34.3 |
HIP 100879 |
9.29 |
| 2026-02-21 12:00 |
20:27:27.05 |
-21:48:29.7 |
HIP 100879 |
10.65 |
| 2026-02-22 00:00 |
20:27:43.55 |
-21:47:25.2 |
HIP 100879 |
13.13 |
| 2026-02-22 12:00 |
20:28:00.00 |
-21:46:20.9 |
HIP 100951 |
15.10 |
| 2026-02-23 00:00 |
20:28:16.40 |
-21:45:16.6 |
HIP 100951 |
16.32 |
| 2026-02-23 12:00 |
20:28:32.75 |
-21:44:12.5 |
HIP 100951 |
18.33 |
| 2026-02-24 00:00 |
20:28:49.05 |
-21:43:08.5 |
HIP 100951 |
20.89 |