メタデータ
| 項目 |
値 |
| Designation |
C/2014 B1 (Schwartz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2017-09-10T20:55:53.734080Z |
| Orbit solution date (soln_date, UTC) |
2022-04-30T03:12:27Z |
| Obs used |
1276 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
6.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-02-16.0000000 |
| e |
1.00321505 |
| q (au) |
9.556680 |
| a (au) |
-2972.479051 |
| i (deg) |
28.375526 |
| Ω (om, deg) |
161.394483 |
| ω (w, deg) |
345.859143 |
| M (ma, deg) |
0.000962 |
等級
散乱 + 全体線形
$$
M_a = (-3.000 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-3.000 |
| n |
6.000 |
| gf |
0.904 |
| gb |
-0.937 |
| k |
1.000 |
| δ90 |
4.685 |
| 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 |
| 2014-01-28 |
2017-06-16 |
+8.9131 |
-9.152 |
| 2017-11-15 |
2022-04-24 |
+7.9405 |
-8.012 |
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) |
| 2026-09-25 00:00 |
15:50:33.29 |
+07:18:46.2 |
HIP 77499 |
19.02 |
| 2026-09-25 12:00 |
15:50:37.86 |
+07:18:00.9 |
HIP 77703 |
19.35 |
| 2026-09-26 00:00 |
15:50:42.47 |
+07:17:15.7 |
HIP 77703 |
18.09 |
| 2026-09-26 12:00 |
15:50:47.12 |
+07:16:30.6 |
HIP 77703 |
16.84 |
| 2026-09-27 00:00 |
15:50:51.81 |
+07:15:45.7 |
HIP 77703 |
15.60 |
| 2026-09-27 12:00 |
15:50:56.54 |
+07:15:00.8 |
HIP 77703 |
14.37 |
| 2026-09-28 00:00 |
15:51:01.30 |
+07:14:16.0 |
HIP 77703 |
13.17 |
| 2026-09-28 12:00 |
15:51:06.10 |
+07:13:31.4 |
HIP 77703 |
12.00 |
| 2026-09-29 00:00 |
15:51:10.94 |
+07:12:46.8 |
HIP 77703 |
10.88 |
| 2026-09-29 12:00 |
15:51:15.81 |
+07:12:02.4 |
HIP 77703 |
9.82 |
| 2026-09-30 00:00 |
15:51:20.72 |
+07:11:18.1 |
HIP 77703 |
8.86 |
| 2026-09-30 12:00 |
15:51:25.67 |
+07:10:33.9 |
HIP 77703 |
8.02 |
| 2026-10-01 00:00 |
15:51:30.65 |
+07:09:49.8 |
HIP 77703 |
7.37 |
| 2026-10-01 12:00 |
15:51:35.67 |
+07:09:05.9 |
HIP 77703 |
6.94 |
| 2026-10-02 00:00 |
15:51:40.72 |
+07:08:22.1 |
HIP 77703 |
6.79 |
| 2026-10-02 12:00 |
15:51:45.81 |
+07:07:38.4 |
HIP 77703 |
6.94 |
| 2026-10-03 00:00 |
15:51:50.93 |
+07:06:54.9 |
HIP 77703 |
7.38 |
| 2026-10-03 12:00 |
15:51:56.09 |
+07:06:11.4 |
HIP 77703 |
8.07 |
| 2026-10-04 00:00 |
15:52:01.29 |
+07:05:28.2 |
HIP 77703 |
8.94 |
| 2026-10-04 12:00 |
15:52:06.51 |
+07:04:45.0 |
HIP 77703 |
9.96 |
| 2026-10-05 00:00 |
15:52:11.77 |
+07:04:02.0 |
HIP 77703 |
11.08 |
| 2026-10-05 12:00 |
15:52:17.07 |
+07:03:19.2 |
HIP 77703 |
12.29 |
| 2026-10-06 00:00 |
15:52:22.40 |
+07:02:36.5 |
HIP 77703 |
13.55 |
| 2026-10-06 12:00 |
15:52:27.76 |
+07:01:54.0 |
HIP 77703 |
14.86 |
| 2026-10-07 00:00 |
15:52:33.16 |
+07:01:11.6 |
HIP 77703 |
16.21 |
| 2026-10-07 12:00 |
15:52:38.59 |
+07:00:29.4 |
HIP 77703 |
17.59 |
| 2026-10-08 00:00 |
15:52:44.05 |
+06:59:47.3 |
HIP 77703 |
18.99 |
| 2026-10-08 12:00 |
15:52:49.54 |
+06:59:05.4 |
HIP 77703 |
20.42 |
| 2026-10-09 00:00 |
15:52:55.07 |
+06:58:23.6 |
HIP 77703 |
21.86 |
| 2026-10-09 12:00 |
15:53:00.62 |
+06:57:42.1 |
HIP 77703 |
23.32 |
| 2026-10-10 00:00 |
15:53:06.21 |
+06:57:00.7 |
HIP 77703 |
24.79 |
| 2026-10-10 12:00 |
15:53:11.83 |
+06:56:19.5 |
HIP 77703 |
26.27 |
| 2026-10-11 00:00 |
15:53:17.48 |
+06:55:38.4 |
HIP 77703 |
27.77 |
| 2026-10-11 12:00 |
15:53:23.16 |
+06:54:57.5 |
HIP 77703 |
29.27 |
| 2026-10-12 00:00 |
15:53:28.87 |
+06:54:16.9 |
HIP 77929 |
30.34 |
| 2026-10-12 12:00 |
15:53:34.61 |
+06:53:36.4 |
HIP 77929 |
29.88 |
| 2026-10-13 00:00 |
15:53:40.38 |
+06:52:56.1 |
HIP 77929 |
29.49 |
| 2026-10-13 12:00 |
15:53:46.18 |
+06:52:15.9 |
HIP 77929 |
29.18 |
| 2026-10-14 00:00 |
15:53:52.01 |
+06:51:36.0 |
HIP 77929 |
28.94 |
| 2026-10-14 12:00 |
15:53:57.87 |
+06:50:56.3 |
HIP 77929 |
28.78 |
| 2026-10-15 00:00 |
15:54:03.75 |
+06:50:16.7 |
HIP 77929 |
28.71 |
| 2026-10-15 12:00 |
15:54:09.66 |
+06:49:37.4 |
HIP 77929 |
28.72 |
| 2026-10-16 00:00 |
15:54:15.60 |
+06:48:58.3 |
HIP 77929 |
28.81 |