メタデータ
| 項目 |
値 |
| Designation |
C/2019 L1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-08-11T06:51:01.670400Z |
| Orbit solution date (soln_date, UTC) |
2023-01-14T00:12:29Z |
| Obs used |
103 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-06-12T12:39:55.872000Z |
| Discovery magnitude (MPC) |
20.10 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, 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 |
0.70662278 |
| q (au) |
2.890226 |
| a (au) |
9.851568 |
| i (deg) |
9.993558 |
| Ω (om, deg) |
254.409692 |
| ω (w, deg) |
49.919599 |
| M (ma, deg) |
358.970912 |
等級
散乱 + 全体線形
$$
M_a = (11.057 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.057 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.790 |
| k |
0.995 |
| 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) |
| 2026-09-20 00:00 |
06:45:07.83 |
+19:18:58.7 |
HIP 32324 |
13.18 |
| 2026-09-20 12:00 |
06:45:11.29 |
+19:18:42.9 |
HIP 32324 |
13.68 |
| 2026-09-21 00:00 |
06:45:14.67 |
+19:18:27.3 |
HIP 32324 |
14.20 |
| 2026-09-21 12:00 |
06:45:17.98 |
+19:18:11.6 |
HIP 32324 |
14.74 |
| 2026-09-22 00:00 |
06:45:21.22 |
+19:17:56.0 |
HIP 32324 |
15.30 |
| 2026-09-22 12:00 |
06:45:24.38 |
+19:17:40.5 |
HIP 32324 |
15.87 |
| 2026-09-23 00:00 |
06:45:27.46 |
+19:17:25.0 |
HIP 32324 |
16.45 |
| 2026-09-23 12:00 |
06:45:30.47 |
+19:17:09.6 |
HIP 32324 |
17.04 |
| 2026-09-24 00:00 |
06:45:33.41 |
+19:16:54.2 |
HIP 32324 |
17.63 |
| 2026-09-24 12:00 |
06:45:36.27 |
+19:16:38.9 |
HIP 32324 |
18.21 |
| 2026-09-25 00:00 |
06:45:39.05 |
+19:16:23.6 |
HIP 32324 |
18.80 |
| 2026-09-25 12:00 |
06:45:41.76 |
+19:16:08.4 |
HIP 32324 |
19.38 |
| 2026-09-26 00:00 |
06:45:44.39 |
+19:15:53.2 |
HIP 32324 |
19.96 |
| 2026-09-26 12:00 |
06:45:46.94 |
+19:15:38.1 |
HIP 32324 |
20.53 |
| 2026-09-27 00:00 |
06:45:49.41 |
+19:15:23.1 |
HIP 32324 |
21.09 |
| 2026-09-27 12:00 |
06:45:51.81 |
+19:15:08.1 |
HIP 32324 |
21.64 |
| 2026-09-28 00:00 |
06:45:54.13 |
+19:14:53.2 |
HIP 32324 |
22.19 |
| 2026-09-28 12:00 |
06:45:56.38 |
+19:14:38.4 |
HIP 32324 |
22.72 |
| 2026-09-29 00:00 |
06:45:58.55 |
+19:14:23.6 |
HIP 32324 |
23.25 |
| 2026-09-29 12:00 |
06:46:00.63 |
+19:14:08.9 |
HIP 32324 |
23.76 |
| 2026-09-30 00:00 |
06:46:02.64 |
+19:13:54.3 |
HIP 32451 |
24.04 |
| 2026-09-30 12:00 |
06:46:04.58 |
+19:13:39.7 |
HIP 32451 |
23.72 |
| 2026-10-01 00:00 |
06:46:06.43 |
+19:13:25.2 |
HIP 32451 |
23.41 |
| 2026-10-01 12:00 |
06:46:08.20 |
+19:13:10.7 |
HIP 32451 |
23.12 |
| 2026-10-02 00:00 |
06:46:09.90 |
+19:12:56.4 |
HIP 32451 |
22.83 |
| 2026-10-02 12:00 |
06:46:11.51 |
+19:12:42.1 |
HIP 32451 |
22.55 |
| 2026-10-03 00:00 |
06:46:13.05 |
+19:12:27.8 |
HIP 32451 |
22.28 |
| 2026-10-03 12:00 |
06:46:14.51 |
+19:12:13.7 |
HIP 32451 |
22.02 |
| 2026-10-04 00:00 |
06:46:15.88 |
+19:11:59.6 |
HIP 32451 |
21.76 |
| 2026-10-04 12:00 |
06:46:17.18 |
+19:11:45.6 |
HIP 32451 |
21.52 |
| 2026-10-05 00:00 |
06:46:18.39 |
+19:11:31.6 |
HIP 32451 |
21.27 |
| 2026-10-05 12:00 |
06:46:19.53 |
+19:11:17.8 |
HIP 32451 |
21.04 |
| 2026-10-06 00:00 |
06:46:20.58 |
+19:11:04.0 |
HIP 32451 |
20.80 |
| 2026-10-06 12:00 |
06:46:21.56 |
+19:10:50.3 |
HIP 32451 |
20.58 |
| 2026-10-07 00:00 |
06:46:22.45 |
+19:10:36.7 |
HIP 32451 |
20.35 |
| 2026-10-07 12:00 |
06:46:23.26 |
+19:10:23.2 |
HIP 32451 |
20.13 |
| 2026-10-08 00:00 |
06:46:23.99 |
+19:10:09.7 |
HIP 32451 |
19.91 |
| 2026-10-08 12:00 |
06:46:24.64 |
+19:09:56.4 |
HIP 32451 |
19.69 |
| 2026-10-09 00:00 |
06:46:25.20 |
+19:09:43.1 |
HIP 32451 |
19.48 |
| 2026-10-09 12:00 |
06:46:25.69 |
+19:09:29.9 |
HIP 32451 |
19.26 |
| 2026-10-10 00:00 |
06:46:26.09 |
+19:09:16.8 |
HIP 32451 |
19.05 |
| 2026-10-10 12:00 |
06:46:26.41 |
+19:09:03.7 |
HIP 32451 |
18.84 |
| 2026-10-11 00:00 |
06:46:26.65 |
+19:08:50.8 |
HIP 32451 |
18.63 |