C/2019 L1 (PANSTARRS)
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) |
| 2026-02-03 00:00 |
06:01:09.92 |
+19:57:59.1 |
HIP 28495 |
9.82 |
| 2026-02-03 12:00 |
06:01:04.00 |
+19:58:01.2 |
HIP 28495 |
9.44 |
| 2026-02-04 00:00 |
06:00:58.16 |
+19:58:03.3 |
HIP 28495 |
9.25 |
| 2026-02-04 12:00 |
06:00:52.40 |
+19:58:05.5 |
HIP 28495 |
9.26 |
| 2026-02-05 00:00 |
06:00:46.70 |
+19:58:07.8 |
HIP 28425 |
8.78 |
| 2026-02-05 12:00 |
06:00:41.08 |
+19:58:10.0 |
HIP 28425 |
7.47 |
| 2026-02-06 00:00 |
06:00:35.54 |
+19:58:12.3 |
HIP 28425 |
6.18 |
| 2026-02-06 12:00 |
06:00:30.07 |
+19:58:14.7 |
HIP 28425 |
4.92 |
| 2026-02-07 00:00 |
06:00:24.67 |
+19:58:17.1 |
HIP 28425 |
3.69 |
| 2026-02-07 12:00 |
06:00:19.35 |
+19:58:19.5 |
HIP 28425 |
2.52 |
| 2026-02-08 00:00 |
06:00:14.11 |
+19:58:22.0 |
HIP 28425 |
1.49 |
| 2026-02-08 12:00 |
06:00:08.94 |
+19:58:24.5 |
HIP 28425 |
1.07 |
| 2026-02-09 00:00 |
06:00:03.86 |
+19:58:27.0 |
HIP 28425 |
1.72 |
| 2026-02-09 12:00 |
05:59:58.85 |
+19:58:29.6 |
HIP 28425 |
2.74 |
| 2026-02-10 00:00 |
05:59:53.91 |
+19:58:32.3 |
HIP 28425 |
3.84 |
| 2026-02-10 12:00 |
05:59:49.06 |
+19:58:34.9 |
HIP 28373 |
4.44 |
| 2026-02-11 00:00 |
05:59:44.28 |
+19:58:37.6 |
HIP 28373 |
4.00 |
| 2026-02-11 12:00 |
05:59:39.59 |
+19:58:40.4 |
HIP 28373 |
3.85 |
| 2026-02-12 00:00 |
05:59:34.97 |
+19:58:43.2 |
HIP 28373 |
4.01 |
| 2026-02-12 12:00 |
05:59:30.44 |
+19:58:46.0 |
HIP 28373 |
4.43 |
| 2026-02-13 00:00 |
05:59:25.98 |
+19:58:48.8 |
HIP 28373 |
5.03 |
| 2026-02-13 12:00 |
05:59:21.61 |
+19:58:51.7 |
HIP 28373 |
5.75 |
| 2026-02-14 00:00 |
05:59:17.32 |
+19:58:54.7 |
HIP 28373 |
6.54 |
| 2026-02-14 12:00 |
05:59:13.11 |
+19:58:57.7 |
HIP 28373 |
7.36 |
| 2026-02-15 00:00 |
05:59:08.99 |
+19:59:00.7 |
HIP 28373 |
8.21 |
| 2026-02-15 12:00 |
05:59:04.94 |
+19:59:03.7 |
HIP 28373 |
9.06 |
| 2026-02-16 00:00 |
05:59:00.98 |
+19:59:06.8 |
HIP 28373 |
9.92 |
| 2026-02-16 12:00 |
05:58:57.10 |
+19:59:09.9 |
HIP 28373 |
10.76 |
| 2026-02-17 00:00 |
05:58:53.31 |
+19:59:13.1 |
HIP 28373 |
11.61 |
| 2026-02-17 12:00 |
05:58:49.60 |
+19:59:16.2 |
HIP 28373 |
12.44 |
| 2026-02-18 00:00 |
05:58:45.98 |
+19:59:19.5 |
HIP 28294 |
13.08 |
| 2026-02-18 12:00 |
05:58:42.44 |
+19:59:22.7 |
HIP 28294 |
13.08 |
| 2026-02-19 00:00 |
05:58:38.98 |
+19:59:26.0 |
HIP 28294 |
13.12 |
| 2026-02-19 12:00 |
05:58:35.61 |
+19:59:29.3 |
HIP 28294 |
13.21 |
| 2026-02-20 00:00 |
05:58:32.33 |
+19:59:32.7 |
HIP 28294 |
13.34 |
| 2026-02-20 12:00 |
05:58:29.13 |
+19:59:36.0 |
HIP 28294 |
13.51 |
| 2026-02-21 00:00 |
05:58:26.01 |
+19:59:39.5 |
HIP 28294 |
13.71 |
| 2026-02-21 12:00 |
05:58:22.99 |
+19:59:42.9 |
HIP 28294 |
13.93 |
| 2026-02-22 00:00 |
05:58:20.05 |
+19:59:46.4 |
HIP 28294 |
14.18 |
| 2026-02-22 12:00 |
05:58:17.19 |
+19:59:49.9 |
HIP 28294 |
14.45 |
| 2026-02-23 00:00 |
05:58:14.42 |
+19:59:53.4 |
HIP 28294 |
14.73 |
| 2026-02-23 12:00 |
05:58:11.74 |
+19:59:57.0 |
HIP 28294 |
15.02 |
| 2026-02-24 00:00 |
05:58:09.15 |
+20:00:00.5 |
HIP 28294 |
15.32 |