C/2006 VZ13 (LINEAR)
| Parameter |
Value |
| 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 |
- |
Osculating Elements
| Parameter |
Value |
| 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 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.897 + 4.279\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.897 |
| n |
4.279 |
| gf |
1.000 |
| gb |
-0.999 |
| k |
0.997 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2007-04-21 |
2007-06-18 |
-9.3482 |
+2.007 |
| 2007-06-18 |
2007-08-09 |
+1.4866 |
+0.135 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
05:32:22.30 |
+05:46:13.6 |
HIP 25938 |
17.00 |
| 2026-02-03 12:00 |
05:32:20.17 |
+05:46:24.4 |
HIP 25938 |
16.72 |
| 2026-02-04 00:00 |
05:32:18.06 |
+05:46:35.2 |
HIP 25938 |
16.45 |
| 2026-02-04 12:00 |
05:32:15.98 |
+05:46:46.2 |
HIP 25938 |
16.19 |
| 2026-02-05 00:00 |
05:32:13.92 |
+05:46:57.2 |
HIP 25938 |
15.95 |
| 2026-02-05 12:00 |
05:32:11.88 |
+05:47:08.3 |
HIP 25938 |
15.72 |
| 2026-02-06 00:00 |
05:32:09.86 |
+05:47:19.5 |
HIP 25938 |
15.51 |
| 2026-02-06 12:00 |
05:32:07.87 |
+05:47:30.8 |
HIP 25938 |
15.31 |
| 2026-02-07 00:00 |
05:32:05.90 |
+05:47:42.1 |
HIP 25938 |
15.12 |
| 2026-02-07 12:00 |
05:32:03.95 |
+05:47:53.5 |
HIP 25938 |
14.95 |
| 2026-02-08 00:00 |
05:32:02.03 |
+05:48:05.1 |
HIP 25938 |
14.80 |
| 2026-02-08 12:00 |
05:32:00.13 |
+05:48:16.7 |
HIP 25938 |
14.66 |
| 2026-02-09 00:00 |
05:31:58.25 |
+05:48:28.4 |
HIP 25938 |
14.53 |
| 2026-02-09 12:00 |
05:31:56.40 |
+05:48:40.1 |
HIP 25938 |
14.42 |
| 2026-02-10 00:00 |
05:31:54.57 |
+05:48:52.0 |
HIP 25938 |
14.32 |
| 2026-02-10 12:00 |
05:31:52.76 |
+05:49:03.9 |
HIP 25938 |
14.23 |
| 2026-02-11 00:00 |
05:31:50.98 |
+05:49:15.9 |
HIP 25938 |
14.16 |
| 2026-02-11 12:00 |
05:31:49.23 |
+05:49:28.0 |
HIP 25938 |
14.10 |
| 2026-02-12 00:00 |
05:31:47.50 |
+05:49:40.1 |
HIP 25938 |
14.05 |
| 2026-02-12 12:00 |
05:31:45.79 |
+05:49:52.3 |
HIP 25938 |
14.02 |
| 2026-02-13 00:00 |
05:31:44.11 |
+05:50:04.6 |
HIP 25938 |
14.00 |
| 2026-02-13 12:00 |
05:31:42.45 |
+05:50:17.0 |
HIP 25938 |
13.99 |
| 2026-02-14 00:00 |
05:31:40.82 |
+05:50:29.4 |
HIP 25938 |
13.99 |
| 2026-02-14 12:00 |
05:31:39.21 |
+05:50:41.9 |
HIP 25938 |
14.00 |
| 2026-02-15 00:00 |
05:31:37.63 |
+05:50:54.5 |
HIP 25813 |
13.93 |
| 2026-02-15 12:00 |
05:31:36.07 |
+05:51:07.2 |
HIP 25813 |
13.49 |
| 2026-02-16 00:00 |
05:31:34.54 |
+05:51:19.9 |
HIP 25813 |
13.05 |
| 2026-02-16 12:00 |
05:31:33.03 |
+05:51:32.7 |
HIP 25813 |
12.62 |
| 2026-02-17 00:00 |
05:31:31.55 |
+05:51:45.5 |
HIP 25813 |
12.20 |
| 2026-02-17 12:00 |
05:31:30.10 |
+05:51:58.4 |
HIP 25813 |
11.78 |
| 2026-02-18 00:00 |
05:31:28.67 |
+05:52:11.4 |
HIP 25813 |
11.37 |
| 2026-02-18 12:00 |
05:31:27.27 |
+05:52:24.4 |
HIP 25813 |
10.96 |
| 2026-02-19 00:00 |
05:31:25.89 |
+05:52:37.5 |
HIP 25813 |
10.56 |
| 2026-02-19 12:00 |
05:31:24.54 |
+05:52:50.7 |
HIP 25813 |
10.16 |
| 2026-02-20 00:00 |
05:31:23.21 |
+05:53:03.9 |
HIP 25813 |
9.77 |
| 2026-02-20 12:00 |
05:31:21.92 |
+05:53:17.2 |
HIP 25813 |
9.39 |
| 2026-02-21 00:00 |
05:31:20.64 |
+05:53:30.5 |
HIP 25813 |
9.01 |
| 2026-02-21 12:00 |
05:31:19.40 |
+05:53:43.9 |
HIP 25813 |
8.64 |
| 2026-02-22 00:00 |
05:31:18.18 |
+05:53:57.3 |
HIP 25813 |
8.28 |
| 2026-02-22 12:00 |
05:31:16.98 |
+05:54:10.8 |
HIP 25813 |
7.92 |
| 2026-02-23 00:00 |
05:31:15.82 |
+05:54:24.4 |
HIP 25813 |
7.57 |
| 2026-02-23 12:00 |
05:31:14.68 |
+05:54:38.0 |
HIP 25813 |
7.23 |
| 2026-02-24 00:00 |
05:31:13.56 |
+05:54:51.6 |
HIP 25813 |
6.90 |