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 |
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
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) |
| 2026-03-26 00:00 |
01:00:19.62 |
+45:50:59.2 |
HIP 4734 |
19.67 |
| 2026-03-26 12:00 |
01:00:28.42 |
+45:51:29.9 |
HIP 4734 |
18.84 |
| 2026-03-27 00:00 |
01:00:37.24 |
+45:52:01.1 |
HIP 4734 |
18.10 |
| 2026-03-27 12:00 |
01:00:46.07 |
+45:52:32.8 |
HIP 4734 |
17.48 |
| 2026-03-28 00:00 |
01:00:54.91 |
+45:53:04.9 |
HIP 4734 |
16.98 |
| 2026-03-28 12:00 |
01:01:03.76 |
+45:53:37.6 |
HIP 4734 |
16.62 |
| 2026-03-29 00:00 |
01:01:12.62 |
+45:54:10.8 |
HIP 4734 |
16.40 |
| 2026-03-29 12:00 |
01:01:21.49 |
+45:54:44.4 |
HIP 4734 |
16.34 |
| 2026-03-30 00:00 |
01:01:30.36 |
+45:55:18.6 |
HIP 4734 |
16.43 |
| 2026-03-30 12:00 |
01:01:39.24 |
+45:55:53.2 |
HIP 4734 |
16.68 |
| 2026-03-31 00:00 |
01:01:48.13 |
+45:56:28.3 |
HIP 4734 |
17.08 |
| 2026-03-31 12:00 |
01:01:57.02 |
+45:57:03.9 |
HIP 4734 |
17.62 |
| 2026-04-01 00:00 |
01:02:05.92 |
+45:57:40.0 |
HIP 4734 |
18.29 |
| 2026-04-01 12:00 |
01:02:14.83 |
+45:58:16.6 |
HIP 4734 |
19.07 |
| 2026-04-02 00:00 |
01:02:23.74 |
+45:58:53.6 |
HIP 4734 |
19.96 |
| 2026-04-02 12:00 |
01:02:32.65 |
+45:59:31.1 |
HIP 4734 |
20.94 |
| 2026-04-03 00:00 |
01:02:41.57 |
+46:00:09.1 |
HIP 4734 |
22.00 |
| 2026-04-03 12:00 |
01:02:50.49 |
+46:00:47.5 |
HIP 4734 |
23.13 |
| 2026-04-04 00:00 |
01:02:59.42 |
+46:01:26.5 |
HIP 4734 |
24.31 |
| 2026-04-04 12:00 |
01:03:08.35 |
+46:02:05.8 |
HIP 4734 |
25.55 |
| 2026-04-05 00:00 |
01:03:17.28 |
+46:02:45.7 |
HIP 4734 |
26.84 |
| 2026-04-05 12:00 |
01:03:26.22 |
+46:03:26.0 |
HIP 4734 |
28.17 |
| 2026-04-06 00:00 |
01:03:35.15 |
+46:04:06.8 |
HIP 4734 |
29.53 |
| 2026-04-06 12:00 |
01:03:44.09 |
+46:04:48.0 |
HIP 4734 |
30.92 |
| 2026-04-07 00:00 |
01:03:53.02 |
+46:05:29.7 |
HIP 4734 |
32.34 |
| 2026-04-07 12:00 |
01:04:01.96 |
+46:06:11.9 |
HIP 4734 |
33.78 |
| 2026-04-08 00:00 |
01:04:10.90 |
+46:06:54.5 |
HIP 4734 |
35.25 |
| 2026-04-08 12:00 |
01:04:19.83 |
+46:07:37.6 |
HIP 4734 |
36.73 |
| 2026-04-09 00:00 |
01:04:28.77 |
+46:08:21.1 |
HIP 4734 |
38.23 |
| 2026-04-09 12:00 |
01:04:37.70 |
+46:09:05.0 |
HIP 4734 |
39.75 |
| 2026-04-10 00:00 |
01:04:46.63 |
+46:09:49.4 |
HIP 4734 |
41.28 |
| 2026-04-10 12:00 |
01:04:55.56 |
+46:10:34.3 |
HIP 4734 |
42.83 |
| 2026-04-11 00:00 |
01:05:04.48 |
+46:11:19.6 |
HIP 5388 |
42.95 |
| 2026-04-11 12:00 |
01:05:13.40 |
+46:12:05.3 |
HIP 5388 |
41.78 |
| 2026-04-12 00:00 |
01:05:22.32 |
+46:12:51.5 |
HIP 5388 |
40.64 |
| 2026-04-12 12:00 |
01:05:31.23 |
+46:13:38.1 |
HIP 5388 |
39.56 |
| 2026-04-13 00:00 |
01:05:40.14 |
+46:14:25.2 |
HIP 5388 |
38.52 |
| 2026-04-13 12:00 |
01:05:49.04 |
+46:15:12.6 |
HIP 5388 |
37.55 |
| 2026-04-14 00:00 |
01:05:57.94 |
+46:16:00.5 |
HIP 5388 |
36.63 |
| 2026-04-14 12:00 |
01:06:06.83 |
+46:16:48.9 |
HIP 5388 |
35.78 |
| 2026-04-15 00:00 |
01:06:15.71 |
+46:17:37.6 |
HIP 5388 |
35.00 |
| 2026-04-15 12:00 |
01:06:24.58 |
+46:18:26.8 |
HIP 5388 |
34.30 |
| 2026-04-16 00:00 |
01:06:33.45 |
+46:19:16.4 |
HIP 5388 |
33.68 |