| 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 |
-1.000 |
| 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 |
-9.3464 |
+2.007 |
| 2007-06-18 |
2007-08-09 |
+1.4862 |
+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) |
| 2026-06-01 00:00 |
05:35:06.59 |
+06:34:48.1 |
HIP 26170 |
5.42 |
| 2026-06-01 12:00 |
05:35:09.37 |
+06:34:54.0 |
HIP 26170 |
6.11 |
| 2026-06-02 00:00 |
05:35:12.15 |
+06:34:59.7 |
HIP 26170 |
6.80 |
| 2026-06-02 12:00 |
05:35:14.94 |
+06:35:05.4 |
HIP 26170 |
7.50 |
| 2026-06-03 00:00 |
05:35:17.74 |
+06:35:11.0 |
HIP 26170 |
8.19 |
| 2026-06-03 12:00 |
05:35:20.54 |
+06:35:16.5 |
HIP 26170 |
8.89 |
| 2026-06-04 00:00 |
05:35:23.34 |
+06:35:21.9 |
HIP 26170 |
9.59 |
| 2026-06-04 12:00 |
05:35:26.15 |
+06:35:27.2 |
HIP 26170 |
10.29 |
| 2026-06-05 00:00 |
05:35:28.96 |
+06:35:32.3 |
HIP 26238 |
10.42 |
| 2026-06-05 12:00 |
05:35:31.78 |
+06:35:37.4 |
HIP 26238 |
10.45 |
| 2026-06-06 00:00 |
05:35:34.60 |
+06:35:42.4 |
HIP 26313 |
10.37 |
| 2026-06-06 12:00 |
05:35:37.43 |
+06:35:47.2 |
HIP 26313 |
9.68 |
| 2026-06-07 00:00 |
05:35:40.26 |
+06:35:52.0 |
HIP 26313 |
8.99 |
| 2026-06-07 12:00 |
05:35:43.09 |
+06:35:56.6 |
HIP 26313 |
8.30 |
| 2026-06-08 00:00 |
05:35:45.92 |
+06:36:01.2 |
HIP 26313 |
7.61 |
| 2026-06-08 12:00 |
05:35:48.76 |
+06:36:05.6 |
HIP 26313 |
6.93 |
| 2026-06-09 00:00 |
05:35:51.60 |
+06:36:09.9 |
HIP 26313 |
6.25 |
| 2026-06-09 12:00 |
05:35:54.45 |
+06:36:14.2 |
HIP 26313 |
5.59 |
| 2026-06-10 00:00 |
05:35:57.30 |
+06:36:18.3 |
HIP 26313 |
4.93 |
| 2026-06-10 12:00 |
05:36:00.14 |
+06:36:22.3 |
HIP 26313 |
4.30 |
| 2026-06-11 00:00 |
05:36:02.99 |
+06:36:26.2 |
HIP 26313 |
3.69 |
| 2026-06-11 12:00 |
05:36:05.85 |
+06:36:30.0 |
HIP 26313 |
3.13 |
| 2026-06-12 00:00 |
05:36:08.70 |
+06:36:33.7 |
HIP 26313 |
2.64 |
| 2026-06-12 12:00 |
05:36:11.56 |
+06:36:37.3 |
HIP 26313 |
2.27 |
| 2026-06-13 00:00 |
05:36:14.41 |
+06:36:40.8 |
HIP 26313 |
2.09 |
| 2026-06-13 12:00 |
05:36:17.27 |
+06:36:44.1 |
HIP 26313 |
2.15 |
| 2026-06-14 00:00 |
05:36:20.13 |
+06:36:47.4 |
HIP 26313 |
2.43 |
| 2026-06-14 12:00 |
05:36:22.99 |
+06:36:50.5 |
HIP 26313 |
2.86 |
| 2026-06-15 00:00 |
05:36:25.85 |
+06:36:53.6 |
HIP 26313 |
3.39 |
| 2026-06-15 12:00 |
05:36:28.71 |
+06:36:56.5 |
HIP 26313 |
3.97 |
| 2026-06-16 00:00 |
05:36:31.57 |
+06:36:59.3 |
HIP 26313 |
4.60 |
| 2026-06-16 12:00 |
05:36:34.43 |
+06:37:02.1 |
HIP 26313 |
5.25 |
| 2026-06-17 00:00 |
05:36:37.29 |
+06:37:04.7 |
HIP 26313 |
5.91 |
| 2026-06-17 12:00 |
05:36:40.15 |
+06:37:07.2 |
HIP 26313 |
6.58 |
| 2026-06-18 00:00 |
05:36:43.00 |
+06:37:09.5 |
HIP 26313 |
7.26 |
| 2026-06-18 12:00 |
05:36:45.86 |
+06:37:11.8 |
HIP 26313 |
7.95 |
| 2026-06-19 00:00 |
05:36:48.72 |
+06:37:14.0 |
HIP 26313 |
8.64 |
| 2026-06-19 12:00 |
05:36:51.57 |
+06:37:16.1 |
HIP 26313 |
9.33 |
| 2026-06-20 00:00 |
05:36:54.42 |
+06:37:18.0 |
HIP 26313 |
10.02 |
| 2026-06-20 12:00 |
05:36:57.27 |
+06:37:19.8 |
HIP 26313 |
10.72 |
| 2026-06-21 00:00 |
05:37:00.12 |
+06:37:21.6 |
HIP 26313 |
11.42 |
| 2026-06-21 12:00 |
05:37:02.97 |
+06:37:23.2 |
HIP 26313 |
12.11 |
| 2026-06-22 00:00 |
05:37:05.81 |
+06:37:24.7 |
HIP 26313 |
12.81 |