C/2019 V1 (Borisov)
メタデータ
| 項目 |
値 |
| Designation |
C/2019 V1 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-07-16T14:09:27.541440Z |
| Orbit solution date (soln_date, UTC) |
2022-07-06T03:12:23Z |
| Obs used |
111 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-11-01T23:39:17.568000Z |
| Discovery magnitude (MPC) |
19.00 R |
| Discovery observatory (MPC) |
L51 · MARGO, Nauchnyi |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-11-26.0000000 |
| e |
0.99902392 |
| q (au) |
3.097057 |
| a (au) |
3172.941013 |
| i (deg) |
61.867108 |
| Ω (om, deg) |
83.206671 |
| ω (w, deg) |
51.207673 |
| M (ma, deg) |
359.998712 |
等級
散乱 + 全体線形
$$
M_a = (13.194 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.194 |
| n |
2.000 |
| gf |
0.995 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.982 |
| 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 |
17:37:38.07 |
-21:11:16.3 |
HIP 86274 |
4.22 |
| 2026-02-03 12:00 |
17:37:43.91 |
-21:11:32.5 |
HIP 86274 |
3.86 |
| 2026-02-04 00:00 |
17:37:49.70 |
-21:11:48.8 |
HIP 86274 |
3.99 |
| 2026-02-04 12:00 |
17:37:55.43 |
-21:12:04.9 |
HIP 86274 |
4.54 |
| 2026-02-05 00:00 |
17:38:01.12 |
-21:12:21.0 |
HIP 86274 |
5.37 |
| 2026-02-05 12:00 |
17:38:06.75 |
-21:12:37.1 |
HIP 86274 |
6.38 |
| 2026-02-06 00:00 |
17:38:12.34 |
-21:12:53.1 |
HIP 86274 |
7.48 |
| 2026-02-06 12:00 |
17:38:17.86 |
-21:13:09.0 |
HIP 86274 |
8.63 |
| 2026-02-07 00:00 |
17:38:23.34 |
-21:13:24.9 |
HIP 86274 |
9.81 |
| 2026-02-07 12:00 |
17:38:28.76 |
-21:13:40.7 |
HIP 86274 |
11.01 |
| 2026-02-08 00:00 |
17:38:34.13 |
-21:13:56.5 |
HIP 86274 |
12.21 |
| 2026-02-08 12:00 |
17:38:39.45 |
-21:14:12.2 |
HIP 86274 |
13.42 |
| 2026-02-09 00:00 |
17:38:44.71 |
-21:14:27.9 |
HIP 86274 |
14.62 |
| 2026-02-09 12:00 |
17:38:49.91 |
-21:14:43.5 |
HIP 86274 |
15.82 |
| 2026-02-10 00:00 |
17:38:55.06 |
-21:14:59.0 |
HIP 86274 |
17.01 |
| 2026-02-10 12:00 |
17:39:00.16 |
-21:15:14.5 |
HIP 86274 |
18.19 |
| 2026-02-11 00:00 |
17:39:05.19 |
-21:15:30.0 |
HIP 86274 |
19.37 |
| 2026-02-11 12:00 |
17:39:10.18 |
-21:15:45.4 |
HIP 86274 |
20.53 |
| 2026-02-12 00:00 |
17:39:15.10 |
-21:16:00.8 |
HIP 86274 |
21.68 |
| 2026-02-12 12:00 |
17:39:19.97 |
-21:16:16.1 |
HIP 86274 |
22.82 |
| 2026-02-13 00:00 |
17:39:24.78 |
-21:16:31.3 |
HIP 86274 |
23.95 |
| 2026-02-13 12:00 |
17:39:29.53 |
-21:16:46.5 |
HIP 86274 |
25.07 |
| 2026-02-14 00:00 |
17:39:34.23 |
-21:17:01.7 |
HIP 86274 |
26.18 |
| 2026-02-14 12:00 |
17:39:38.86 |
-21:17:16.8 |
HIP 86274 |
27.27 |
| 2026-02-15 00:00 |
17:39:43.44 |
-21:17:31.8 |
HIP 86274 |
28.35 |
| 2026-02-15 12:00 |
17:39:47.95 |
-21:17:46.8 |
HIP 86274 |
29.42 |
| 2026-02-16 00:00 |
17:39:52.41 |
-21:18:01.8 |
HIP 86519 |
29.55 |
| 2026-02-16 12:00 |
17:39:56.81 |
-21:18:16.7 |
HIP 86519 |
29.31 |
| 2026-02-17 00:00 |
17:40:01.14 |
-21:18:31.6 |
HIP 86519 |
29.11 |
| 2026-02-17 12:00 |
17:40:05.42 |
-21:18:46.4 |
HIP 86519 |
28.95 |
| 2026-02-18 00:00 |
17:40:09.63 |
-21:19:01.2 |
HIP 86519 |
28.84 |
| 2026-02-18 12:00 |
17:40:13.78 |
-21:19:15.9 |
HIP 86519 |
28.76 |
| 2026-02-19 00:00 |
17:40:17.87 |
-21:19:30.6 |
HIP 86519 |
28.72 |
| 2026-02-19 12:00 |
17:40:21.90 |
-21:19:45.3 |
HIP 86519 |
28.72 |
| 2026-02-20 00:00 |
17:40:25.87 |
-21:19:59.9 |
HIP 86519 |
28.75 |
| 2026-02-20 12:00 |
17:40:29.77 |
-21:20:14.4 |
HIP 86519 |
28.82 |
| 2026-02-21 00:00 |
17:40:33.61 |
-21:20:29.0 |
HIP 86519 |
28.92 |
| 2026-02-21 12:00 |
17:40:37.39 |
-21:20:43.4 |
HIP 86519 |
29.04 |
| 2026-02-22 00:00 |
17:40:41.10 |
-21:20:57.9 |
HIP 86519 |
29.20 |
| 2026-02-22 12:00 |
17:40:44.75 |
-21:21:12.3 |
HIP 86519 |
29.38 |
| 2026-02-23 00:00 |
17:40:48.34 |
-21:21:26.6 |
HIP 86519 |
29.59 |
| 2026-02-23 12:00 |
17:40:51.86 |
-21:21:41.0 |
HIP 86519 |
29.82 |
| 2026-02-24 00:00 |
17:40:55.31 |
-21:21:55.3 |
HIP 86519 |
30.08 |