メタデータ
| 項目 |
値 |
| Designation |
C/2019 B3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-01-20T04:27:17.818560Z |
| Orbit solution date (soln_date, UTC) |
2024-05-14T12:42:17Z |
| Obs used |
293 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
8.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-01-24T13:55:58.656000Z |
| Discovery magnitude (MPC) |
19.60 i |
| 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) |
2021-06-17.0000000 |
| e |
1.00210415 |
| q (au) |
6.823022 |
| a (au) |
-3242.642558 |
| i (deg) |
66.536192 |
| Ω (om, deg) |
358.432372 |
| ω (w, deg) |
263.923054 |
| M (ma, deg) |
0.000789 |
等級
散乱 + 全体線形
$$
M_a = (3.014 + 4.873\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
3.014 |
| n |
4.873 |
| gf |
0.911 |
| gb |
-0.565 |
| k |
1.000 |
| δ90 |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2019-01-24 |
2020-11-22 |
+7.1897 |
-6.267 |
| 2021-01-29 |
2022-11-05 |
-12.7161 |
+10.938 |
| 2022-11-05 |
2023-10-18 |
+29.4531 |
-27.381 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
00:08:42.15 |
-04:52:53.4 |
HIP 642 |
12.32 |
| 2026-06-01 12:00 |
00:08:44.93 |
-04:52:12.9 |
HIP 642 |
12.94 |
| 2026-06-02 00:00 |
00:08:47.64 |
-04:51:32.8 |
HIP 642 |
13.59 |
| 2026-06-02 12:00 |
00:08:50.30 |
-04:50:53.0 |
HIP 642 |
14.25 |
| 2026-06-03 00:00 |
00:08:52.90 |
-04:50:13.7 |
HIP 642 |
14.93 |
| 2026-06-03 12:00 |
00:08:55.45 |
-04:49:34.8 |
HIP 642 |
15.62 |
| 2026-06-04 00:00 |
00:08:57.93 |
-04:48:56.2 |
HIP 642 |
16.32 |
| 2026-06-04 12:00 |
00:09:00.35 |
-04:48:18.1 |
HIP 642 |
17.02 |
| 2026-06-05 00:00 |
00:09:02.72 |
-04:47:40.3 |
HIP 642 |
17.71 |
| 2026-06-05 12:00 |
00:09:05.02 |
-04:47:03.0 |
HIP 642 |
18.41 |
| 2026-06-06 00:00 |
00:09:07.27 |
-04:46:26.1 |
HIP 642 |
19.10 |
| 2026-06-06 12:00 |
00:09:09.45 |
-04:45:49.5 |
HIP 642 |
19.79 |
| 2026-06-07 00:00 |
00:09:11.57 |
-04:45:13.4 |
HIP 642 |
20.47 |
| 2026-06-07 12:00 |
00:09:13.64 |
-04:44:37.7 |
HIP 642 |
21.14 |
| 2026-06-08 00:00 |
00:09:15.64 |
-04:44:02.3 |
HIP 642 |
21.80 |
| 2026-06-08 12:00 |
00:09:17.58 |
-04:43:27.4 |
HIP 642 |
22.45 |
| 2026-06-09 00:00 |
00:09:19.45 |
-04:42:52.9 |
HIP 642 |
23.10 |
| 2026-06-09 12:00 |
00:09:21.27 |
-04:42:18.8 |
HIP 642 |
23.73 |
| 2026-06-10 00:00 |
00:09:23.03 |
-04:41:45.1 |
HIP 642 |
24.35 |
| 2026-06-10 12:00 |
00:09:24.72 |
-04:41:11.8 |
HIP 642 |
24.96 |
| 2026-06-11 00:00 |
00:09:26.35 |
-04:40:38.9 |
HIP 642 |
25.55 |
| 2026-06-11 12:00 |
00:09:27.92 |
-04:40:06.4 |
HIP 642 |
26.13 |
| 2026-06-12 00:00 |
00:09:29.42 |
-04:39:34.3 |
HIP 642 |
26.70 |
| 2026-06-12 12:00 |
00:09:30.86 |
-04:39:02.7 |
HIP 642 |
27.26 |
| 2026-06-13 00:00 |
00:09:32.24 |
-04:38:31.4 |
HIP 642 |
27.80 |
| 2026-06-13 12:00 |
00:09:33.55 |
-04:38:00.6 |
HIP 642 |
28.33 |
| 2026-06-14 00:00 |
00:09:34.80 |
-04:37:30.2 |
HIP 642 |
28.85 |
| 2026-06-14 12:00 |
00:09:35.99 |
-04:37:00.2 |
HIP 642 |
29.35 |
| 2026-06-15 00:00 |
00:09:37.11 |
-04:36:30.6 |
HIP 642 |
29.83 |
| 2026-06-15 12:00 |
00:09:38.17 |
-04:36:01.4 |
HIP 642 |
30.30 |
| 2026-06-16 00:00 |
00:09:39.16 |
-04:35:32.6 |
HIP 642 |
30.76 |
| 2026-06-16 12:00 |
00:09:40.09 |
-04:35:04.3 |
HIP 642 |
31.20 |
| 2026-06-17 00:00 |
00:09:40.95 |
-04:34:36.3 |
HIP 642 |
31.63 |
| 2026-06-17 12:00 |
00:09:41.75 |
-04:34:08.8 |
HIP 642 |
32.04 |
| 2026-06-18 00:00 |
00:09:42.48 |
-04:33:41.7 |
HIP 642 |
32.44 |
| 2026-06-18 12:00 |
00:09:43.15 |
-04:33:14.9 |
HIP 642 |
32.82 |
| 2026-06-19 00:00 |
00:09:43.75 |
-04:32:48.6 |
HIP 642 |
33.19 |
| 2026-06-19 12:00 |
00:09:44.29 |
-04:32:22.8 |
HIP 642 |
33.54 |
| 2026-06-20 00:00 |
00:09:44.76 |
-04:31:57.3 |
HIP 642 |
33.88 |
| 2026-06-20 12:00 |
00:09:45.17 |
-04:31:32.2 |
HIP 642 |
34.20 |
| 2026-06-21 00:00 |
00:09:45.51 |
-04:31:07.5 |
HIP 642 |
34.51 |
| 2026-06-21 12:00 |
00:09:45.78 |
-04:30:43.3 |
HIP 642 |
34.80 |
| 2026-06-22 00:00 |
00:09:45.99 |
-04:30:19.5 |
HIP 642 |
35.08 |