メタデータ
| 項目 |
値 |
| Designation |
C/2006 VZ13 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-08-10T21:23:55.631040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:01Z |
| Obs used |
1025 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-06-13.0000000 |
| e |
1.00024586 |
| q (au) |
1.015252 |
| a (au) |
-4129.358475 |
| i (deg) |
134.793320 |
| Ω (om, deg) |
66.026904 |
| ω (w, deg) |
174.115312 |
| M (ma, deg) |
-0.000219 |
等級
散乱 + 全体線形
$$
M_a = (7.897 + 4.279\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.897 |
| n |
4.279 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.997 |
| 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 |
| 2007-04-21 |
2007-06-18 |
-9.3462 |
+2.007 |
| 2007-06-18 |
2007-08-09 |
+1.4861 |
+0.135 |
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 |
05:30:55.87 |
+06:09:23.7 |
HIP 25813 |
12.69 |
| 2026-03-26 12:00 |
05:30:56.39 |
+06:09:38.5 |
HIP 25813 |
12.96 |
| 2026-03-27 00:00 |
05:30:56.93 |
+06:09:53.2 |
HIP 25813 |
13.22 |
| 2026-03-27 12:00 |
05:30:57.50 |
+06:10:07.9 |
HIP 25813 |
13.49 |
| 2026-03-28 00:00 |
05:30:58.09 |
+06:10:22.7 |
HIP 25813 |
13.76 |
| 2026-03-28 12:00 |
05:30:58.71 |
+06:10:37.4 |
HIP 25813 |
14.03 |
| 2026-03-29 00:00 |
05:30:59.36 |
+06:10:52.0 |
HIP 25813 |
14.31 |
| 2026-03-29 12:00 |
05:31:00.03 |
+06:11:06.7 |
HIP 25813 |
14.58 |
| 2026-03-30 00:00 |
05:31:00.72 |
+06:11:21.4 |
HIP 25813 |
14.86 |
| 2026-03-30 12:00 |
05:31:01.44 |
+06:11:36.0 |
HIP 25813 |
15.14 |
| 2026-03-31 00:00 |
05:31:02.19 |
+06:11:50.6 |
HIP 25813 |
15.42 |
| 2026-03-31 12:00 |
05:31:02.96 |
+06:12:05.2 |
HIP 25846 |
15.56 |
| 2026-04-01 00:00 |
05:31:03.75 |
+06:12:19.7 |
HIP 25846 |
15.32 |
| 2026-04-01 12:00 |
05:31:04.57 |
+06:12:34.3 |
HIP 25846 |
15.08 |
| 2026-04-02 00:00 |
05:31:05.41 |
+06:12:48.8 |
HIP 25846 |
14.84 |
| 2026-04-02 12:00 |
05:31:06.28 |
+06:13:03.2 |
HIP 25846 |
14.61 |
| 2026-04-03 00:00 |
05:31:07.17 |
+06:13:17.7 |
HIP 25846 |
14.38 |
| 2026-04-03 12:00 |
05:31:08.09 |
+06:13:32.1 |
HIP 25846 |
14.16 |
| 2026-04-04 00:00 |
05:31:09.03 |
+06:13:46.5 |
HIP 25846 |
13.94 |
| 2026-04-04 12:00 |
05:31:09.99 |
+06:14:00.9 |
HIP 25846 |
13.73 |
| 2026-04-05 00:00 |
05:31:10.98 |
+06:14:15.2 |
HIP 25846 |
13.53 |
| 2026-04-05 12:00 |
05:31:11.99 |
+06:14:29.5 |
HIP 25846 |
13.33 |
| 2026-04-06 00:00 |
05:31:13.03 |
+06:14:43.8 |
HIP 25846 |
13.14 |
| 2026-04-06 12:00 |
05:31:14.09 |
+06:14:58.1 |
HIP 25846 |
12.96 |
| 2026-04-07 00:00 |
05:31:15.17 |
+06:15:12.3 |
HIP 25846 |
12.79 |
| 2026-04-07 12:00 |
05:31:16.28 |
+06:15:26.4 |
HIP 25846 |
12.62 |
| 2026-04-08 00:00 |
05:31:17.41 |
+06:15:40.6 |
HIP 25846 |
12.47 |
| 2026-04-08 12:00 |
05:31:18.56 |
+06:15:54.7 |
HIP 25846 |
12.33 |
| 2026-04-09 00:00 |
05:31:19.74 |
+06:16:08.7 |
HIP 25846 |
12.21 |
| 2026-04-09 12:00 |
05:31:20.94 |
+06:16:22.8 |
HIP 25846 |
12.09 |
| 2026-04-10 00:00 |
05:31:22.16 |
+06:16:36.7 |
HIP 25846 |
11.99 |
| 2026-04-10 12:00 |
05:31:23.40 |
+06:16:50.7 |
HIP 25846 |
11.90 |
| 2026-04-11 00:00 |
05:31:24.67 |
+06:17:04.6 |
HIP 25846 |
11.83 |
| 2026-04-11 12:00 |
05:31:25.96 |
+06:17:18.5 |
HIP 25846 |
11.78 |
| 2026-04-12 00:00 |
05:31:27.28 |
+06:17:32.3 |
HIP 25846 |
11.74 |
| 2026-04-12 12:00 |
05:31:28.61 |
+06:17:46.1 |
HIP 25846 |
11.72 |
| 2026-04-13 00:00 |
05:31:29.97 |
+06:17:59.8 |
HIP 25846 |
11.71 |
| 2026-04-13 12:00 |
05:31:31.35 |
+06:18:13.5 |
HIP 25846 |
11.72 |
| 2026-04-14 00:00 |
05:31:32.75 |
+06:18:27.1 |
HIP 25846 |
11.76 |
| 2026-04-14 12:00 |
05:31:34.18 |
+06:18:40.7 |
HIP 25846 |
11.81 |
| 2026-04-15 00:00 |
05:31:35.63 |
+06:18:54.2 |
HIP 25846 |
11.88 |
| 2026-04-15 12:00 |
05:31:37.09 |
+06:19:07.7 |
HIP 25846 |
11.97 |
| 2026-04-16 00:00 |
05:31:38.58 |
+06:19:21.2 |
HIP 25846 |
12.07 |