メタデータ
| 項目 |
値 |
| Designation |
C/2017 B3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-02-02T14:22:55.968960Z |
| Orbit solution date (soln_date, UTC) |
2022-07-31T01:42:28Z |
| Obs used |
1591 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
9.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-11-01.0000000 |
| e |
1.00205503 |
| q (au) |
3.921429 |
| a (au) |
-1908.207887 |
| i (deg) |
54.177778 |
| Ω (om, deg) |
2.178286 |
| ω (w, deg) |
284.767790 |
| M (ma, deg) |
0.003209 |
等級
散乱 + 全体線形
$$
M_a = (8.267 + 4.444\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.267 |
| n |
4.444 |
| gf |
1.000 |
| gb |
-0.790 |
| k |
0.800 |
| δ90 |
9.997 |
| 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 |
| 2016-03-04 |
2017-03-10 |
+20.0904 |
-16.483 |
| 2017-03-10 |
2019-02-01 |
+0.1708 |
+0.419 |
| 2019-03-27 |
2019-11-19 |
-14.3328 |
+9.294 |
| 2019-11-19 |
2020-11-13 |
+1.1970 |
-1.243 |
| 2020-11-13 |
2022-01-01 |
+11.4957 |
-9.995 |
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) |
| 2026-07-29 00:00 |
01:23:23.11 |
+50:27:22.1 |
HIP 6574 |
10.37 |
| 2026-07-29 12:00 |
01:23:21.38 |
+50:28:30.1 |
HIP 6574 |
10.48 |
| 2026-07-30 00:00 |
01:23:19.56 |
+50:29:37.8 |
HIP 6574 |
10.74 |
| 2026-07-30 12:00 |
01:23:17.67 |
+50:30:45.2 |
HIP 6574 |
11.12 |
| 2026-07-31 00:00 |
01:23:15.70 |
+50:31:52.2 |
HIP 6574 |
11.62 |
| 2026-07-31 12:00 |
01:23:13.65 |
+50:32:59.0 |
HIP 6574 |
12.22 |
| 2026-08-01 00:00 |
01:23:11.52 |
+50:34:05.4 |
HIP 6574 |
12.90 |
| 2026-08-01 12:00 |
01:23:09.32 |
+50:35:11.4 |
HIP 6574 |
13.66 |
| 2026-08-02 00:00 |
01:23:07.04 |
+50:36:17.2 |
HIP 6574 |
14.48 |
| 2026-08-02 12:00 |
01:23:04.68 |
+50:37:22.6 |
HIP 6574 |
15.35 |
| 2026-08-03 00:00 |
01:23:02.24 |
+50:38:27.6 |
HIP 6574 |
16.26 |
| 2026-08-03 12:00 |
01:22:59.73 |
+50:39:32.3 |
HIP 6579 |
16.95 |
| 2026-08-04 00:00 |
01:22:57.14 |
+50:40:36.7 |
HIP 6579 |
16.79 |
| 2026-08-04 12:00 |
01:22:54.47 |
+50:41:40.7 |
HIP 6579 |
16.73 |
| 2026-08-05 00:00 |
01:22:51.72 |
+50:42:44.3 |
HIP 6579 |
16.75 |
| 2026-08-05 12:00 |
01:22:48.89 |
+50:43:47.5 |
HIP 6579 |
16.86 |
| 2026-08-06 00:00 |
01:22:45.99 |
+50:44:50.4 |
HIP 6579 |
17.07 |
| 2026-08-06 12:00 |
01:22:43.01 |
+50:45:52.9 |
HIP 6579 |
17.36 |
| 2026-08-07 00:00 |
01:22:39.95 |
+50:46:55.1 |
HIP 6579 |
17.73 |
| 2026-08-07 12:00 |
01:22:36.82 |
+50:47:56.8 |
HIP 6579 |
18.18 |
| 2026-08-08 00:00 |
01:22:33.61 |
+50:48:58.2 |
HIP 6579 |
18.69 |
| 2026-08-08 12:00 |
01:22:30.32 |
+50:49:59.2 |
HIP 6359 |
17.63 |
| 2026-08-09 00:00 |
01:22:26.95 |
+50:50:59.7 |
HIP 6359 |
16.49 |
| 2026-08-09 12:00 |
01:22:23.51 |
+50:51:59.9 |
HIP 6359 |
15.35 |
| 2026-08-10 00:00 |
01:22:19.99 |
+50:52:59.6 |
HIP 6359 |
14.21 |
| 2026-08-10 12:00 |
01:22:16.39 |
+50:53:59.0 |
HIP 6359 |
13.07 |
| 2026-08-11 00:00 |
01:22:12.72 |
+50:54:57.9 |
HIP 6359 |
11.94 |
| 2026-08-11 12:00 |
01:22:08.97 |
+50:55:56.4 |
HIP 6359 |
10.81 |
| 2026-08-12 00:00 |
01:22:05.14 |
+50:56:54.5 |
HIP 6359 |
9.68 |
| 2026-08-12 12:00 |
01:22:01.24 |
+50:57:52.2 |
HIP 6359 |
8.55 |
| 2026-08-13 00:00 |
01:21:57.26 |
+50:58:49.4 |
HIP 6359 |
7.44 |
| 2026-08-13 12:00 |
01:21:53.21 |
+50:59:46.1 |
HIP 6359 |
6.33 |
| 2026-08-14 00:00 |
01:21:49.08 |
+51:00:42.5 |
HIP 6359 |
5.25 |
| 2026-08-14 12:00 |
01:21:44.88 |
+51:01:38.4 |
HIP 6359 |
4.20 |
| 2026-08-15 00:00 |
01:21:40.60 |
+51:02:33.8 |
HIP 6359 |
3.22 |
| 2026-08-15 12:00 |
01:21:36.25 |
+51:03:28.8 |
HIP 6359 |
2.41 |
| 2026-08-16 00:00 |
01:21:31.82 |
+51:04:23.3 |
HIP 6359 |
1.97 |
| 2026-08-16 12:00 |
01:21:27.32 |
+51:05:17.3 |
HIP 6359 |
2.15 |
| 2026-08-17 00:00 |
01:21:22.74 |
+51:06:10.9 |
HIP 6359 |
2.84 |
| 2026-08-17 12:00 |
01:21:18.10 |
+51:07:04.0 |
HIP 6359 |
3.77 |
| 2026-08-18 00:00 |
01:21:13.38 |
+51:07:56.7 |
HIP 6359 |
4.79 |
| 2026-08-18 12:00 |
01:21:08.58 |
+51:08:48.8 |
HIP 6359 |
5.87 |
| 2026-08-19 00:00 |
01:21:03.72 |
+51:09:40.5 |
HIP 6359 |
6.98 |