C/2019 Q3 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2019 Q3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2018-08-20T18:56:05.832960Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:42:43Z |
| Obs used |
85 |
| NEO |
- |
| M1 |
8.700 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-08-29T05:55:28.704000Z |
| Discovery magnitude (MPC) |
21.10 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) |
2019-08-20.0000000 |
| e |
1.00470354 |
| q (au) |
7.250302 |
| a (au) |
-1541.455781 |
| i (deg) |
65.538248 |
| Ω (om, deg) |
151.325339 |
| ω (w, deg) |
152.625329 |
| M (ma, deg) |
0.005931 |
等級
散乱 + 全体線形
$$
M_a = (7.421 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.421 |
| n |
6.000 |
| gf |
0.932 |
| gb |
-0.739 |
| k |
0.805 |
| δ90 |
4.736 |
| 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 |
02:54:02.35 |
-46:19:45.7 |
HIP 13606 |
15.38 |
| 2026-02-03 12:00 |
02:54:04.27 |
-46:18:16.3 |
HIP 13606 |
14.42 |
| 2026-02-04 00:00 |
02:54:06.26 |
-46:16:46.9 |
HIP 13606 |
13.54 |
| 2026-02-04 12:00 |
02:54:08.34 |
-46:15:17.4 |
HIP 13606 |
12.78 |
| 2026-02-05 00:00 |
02:54:10.49 |
-46:13:47.8 |
HIP 13606 |
12.15 |
| 2026-02-05 12:00 |
02:54:12.72 |
-46:12:18.2 |
HIP 13606 |
11.68 |
| 2026-02-06 00:00 |
02:54:15.04 |
-46:10:48.5 |
HIP 13606 |
11.38 |
| 2026-02-06 12:00 |
02:54:17.43 |
-46:09:18.8 |
HIP 13606 |
11.28 |
| 2026-02-07 00:00 |
02:54:19.90 |
-46:07:49.0 |
HIP 13606 |
11.37 |
| 2026-02-07 12:00 |
02:54:22.45 |
-46:06:19.1 |
HIP 13606 |
11.66 |
| 2026-02-08 00:00 |
02:54:25.08 |
-46:04:49.3 |
HIP 13606 |
12.14 |
| 2026-02-08 12:00 |
02:54:27.78 |
-46:03:19.4 |
HIP 13606 |
12.78 |
| 2026-02-09 00:00 |
02:54:30.57 |
-46:01:49.5 |
HIP 13606 |
13.57 |
| 2026-02-09 12:00 |
02:54:33.43 |
-46:00:19.6 |
HIP 13606 |
14.48 |
| 2026-02-10 00:00 |
02:54:36.37 |
-45:58:49.7 |
HIP 13606 |
15.48 |
| 2026-02-10 12:00 |
02:54:39.39 |
-45:57:19.7 |
HIP 13606 |
16.58 |
| 2026-02-11 00:00 |
02:54:42.49 |
-45:55:49.8 |
HIP 13606 |
17.74 |
| 2026-02-11 12:00 |
02:54:45.66 |
-45:54:19.9 |
HIP 13606 |
18.96 |
| 2026-02-12 00:00 |
02:54:48.91 |
-45:52:50.1 |
HIP 13606 |
20.23 |
| 2026-02-12 12:00 |
02:54:52.24 |
-45:51:20.2 |
HIP 13606 |
21.54 |
| 2026-02-13 00:00 |
02:54:55.64 |
-45:49:50.4 |
HIP 13606 |
22.88 |
| 2026-02-13 12:00 |
02:54:59.12 |
-45:48:20.6 |
HIP 13606 |
24.25 |
| 2026-02-14 00:00 |
02:55:02.68 |
-45:46:50.9 |
HIP 13606 |
25.65 |
| 2026-02-14 12:00 |
02:55:06.31 |
-45:45:21.2 |
HIP 13606 |
27.07 |
| 2026-02-15 00:00 |
02:55:10.02 |
-45:43:51.6 |
HIP 13606 |
28.51 |
| 2026-02-15 12:00 |
02:55:13.80 |
-45:42:22.0 |
HIP 13818 |
27.72 |
| 2026-02-16 00:00 |
02:55:17.65 |
-45:40:52.5 |
HIP 13818 |
26.98 |
| 2026-02-16 12:00 |
02:55:21.59 |
-45:39:23.1 |
HIP 13818 |
26.31 |
| 2026-02-17 00:00 |
02:55:25.59 |
-45:37:53.8 |
HIP 13818 |
25.70 |
| 2026-02-17 12:00 |
02:55:29.67 |
-45:36:24.5 |
HIP 13818 |
25.18 |
| 2026-02-18 00:00 |
02:55:33.83 |
-45:34:55.4 |
HIP 13818 |
24.74 |
| 2026-02-18 12:00 |
02:55:38.05 |
-45:33:26.4 |
HIP 13818 |
24.40 |
| 2026-02-19 00:00 |
02:55:42.36 |
-45:31:57.5 |
HIP 13818 |
24.15 |
| 2026-02-19 12:00 |
02:55:46.73 |
-45:30:28.7 |
HIP 13818 |
24.00 |
| 2026-02-20 00:00 |
02:55:51.17 |
-45:29:00.0 |
HIP 13818 |
23.95 |
| 2026-02-20 12:00 |
02:55:55.69 |
-45:27:31.5 |
HIP 13818 |
24.01 |
| 2026-02-21 00:00 |
02:56:00.28 |
-45:26:03.1 |
HIP 13818 |
24.17 |
| 2026-02-21 12:00 |
02:56:04.94 |
-45:24:34.8 |
HIP 13591 |
23.25 |
| 2026-02-22 00:00 |
02:56:09.67 |
-45:23:06.7 |
HIP 13591 |
22.33 |
| 2026-02-22 12:00 |
02:56:14.48 |
-45:21:38.7 |
HIP 13591 |
21.51 |
| 2026-02-23 00:00 |
02:56:19.35 |
-45:20:10.9 |
HIP 13591 |
20.81 |
| 2026-02-23 12:00 |
02:56:24.29 |
-45:18:43.3 |
HIP 13591 |
20.24 |
| 2026-02-24 00:00 |
02:56:29.30 |
-45:17:15.8 |
HIP 13591 |
19.81 |