メタデータ
| 項目 |
値 |
| Designation |
C/2016 R3 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-10-10T23:59:06.622080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:26Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
16.700 |
| K1 |
4.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-09-15.0000000 |
| e |
0.99548615 |
| q (au) |
0.446783 |
| a (au) |
98.980564 |
| i (deg) |
53.067840 |
| Ω (om, deg) |
78.669399 |
| ω (w, deg) |
118.135919 |
| M (ma, deg) |
359.973978 |
等級
散乱 + 全体線形
$$
M_a = (17.476 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.476 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-03-26 00:00 |
02:09:15.98 |
-40:29:17.4 |
HIP 10096 |
23.52 |
| 2026-03-26 12:00 |
02:09:21.32 |
-40:28:34.1 |
HIP 10096 |
23.98 |
| 2026-03-27 00:00 |
02:09:26.68 |
-40:27:51.3 |
HIP 10096 |
24.48 |
| 2026-03-27 12:00 |
02:09:32.06 |
-40:27:08.7 |
HIP 10096 |
25.03 |
| 2026-03-28 00:00 |
02:09:37.46 |
-40:26:26.6 |
HIP 10096 |
25.63 |
| 2026-03-28 12:00 |
02:09:42.88 |
-40:25:44.8 |
HIP 10096 |
26.26 |
| 2026-03-29 00:00 |
02:09:48.33 |
-40:25:03.5 |
HIP 10096 |
26.93 |
| 2026-03-29 12:00 |
02:09:53.79 |
-40:24:22.5 |
HIP 10096 |
27.63 |
| 2026-03-30 00:00 |
02:09:59.27 |
-40:23:41.9 |
HIP 10096 |
28.36 |
| 2026-03-30 12:00 |
02:10:04.77 |
-40:23:01.6 |
HIP 10096 |
29.12 |
| 2026-03-31 00:00 |
02:10:10.29 |
-40:22:21.8 |
HIP 10096 |
29.91 |
| 2026-03-31 12:00 |
02:10:15.82 |
-40:21:42.3 |
HIP 10096 |
30.72 |
| 2026-04-01 00:00 |
02:10:21.38 |
-40:21:03.3 |
HIP 10096 |
31.56 |
| 2026-04-01 12:00 |
02:10:26.95 |
-40:20:24.6 |
HIP 10096 |
32.41 |
| 2026-04-02 00:00 |
02:10:32.54 |
-40:19:46.4 |
HIP 10096 |
33.28 |
| 2026-04-02 12:00 |
02:10:38.15 |
-40:19:08.5 |
HIP 10325 |
33.01 |
| 2026-04-03 00:00 |
02:10:43.77 |
-40:18:31.0 |
HIP 10325 |
31.78 |
| 2026-04-03 12:00 |
02:10:49.41 |
-40:17:53.9 |
HIP 10325 |
30.54 |
| 2026-04-04 00:00 |
02:10:55.07 |
-40:17:17.3 |
HIP 10325 |
29.31 |
| 2026-04-04 12:00 |
02:11:00.74 |
-40:16:41.0 |
HIP 10325 |
28.08 |
| 2026-04-05 00:00 |
02:11:06.42 |
-40:16:05.1 |
HIP 10325 |
26.85 |
| 2026-04-05 12:00 |
02:11:12.13 |
-40:15:29.7 |
HIP 10325 |
25.62 |
| 2026-04-06 00:00 |
02:11:17.84 |
-40:14:54.7 |
HIP 10325 |
24.40 |
| 2026-04-06 12:00 |
02:11:23.57 |
-40:14:20.0 |
HIP 10325 |
23.17 |
| 2026-04-07 00:00 |
02:11:29.32 |
-40:13:45.8 |
HIP 10325 |
21.96 |
| 2026-04-07 12:00 |
02:11:35.08 |
-40:13:12.0 |
HIP 10325 |
20.74 |
| 2026-04-08 00:00 |
02:11:40.85 |
-40:12:38.6 |
HIP 10325 |
19.54 |
| 2026-04-08 12:00 |
02:11:46.63 |
-40:12:05.7 |
HIP 10325 |
18.33 |
| 2026-04-09 00:00 |
02:11:52.43 |
-40:11:33.1 |
HIP 10325 |
17.14 |
| 2026-04-09 12:00 |
02:11:58.24 |
-40:11:01.0 |
HIP 10325 |
15.95 |
| 2026-04-10 00:00 |
02:12:04.06 |
-40:10:29.3 |
HIP 10325 |
14.78 |
| 2026-04-10 12:00 |
02:12:09.90 |
-40:09:58.1 |
HIP 10325 |
13.62 |
| 2026-04-11 00:00 |
02:12:15.74 |
-40:09:27.2 |
HIP 10325 |
12.47 |
| 2026-04-11 12:00 |
02:12:21.60 |
-40:08:56.8 |
HIP 10325 |
11.35 |
| 2026-04-12 00:00 |
02:12:27.46 |
-40:08:26.9 |
HIP 10325 |
10.25 |
| 2026-04-12 12:00 |
02:12:33.34 |
-40:07:57.3 |
HIP 10325 |
9.20 |
| 2026-04-13 00:00 |
02:12:39.22 |
-40:07:28.2 |
HIP 10325 |
8.20 |
| 2026-04-13 12:00 |
02:12:45.12 |
-40:06:59.6 |
HIP 10325 |
7.27 |
| 2026-04-14 00:00 |
02:12:51.02 |
-40:06:31.4 |
HIP 10325 |
6.45 |
| 2026-04-14 12:00 |
02:12:56.94 |
-40:06:03.6 |
HIP 10325 |
5.78 |
| 2026-04-15 00:00 |
02:13:02.86 |
-40:05:36.3 |
HIP 10325 |
5.32 |
| 2026-04-15 12:00 |
02:13:08.79 |
-40:05:09.4 |
HIP 10325 |
5.12 |
| 2026-04-16 00:00 |
02:13:14.72 |
-40:04:42.9 |
HIP 10325 |
5.22 |