| 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 |
-9.3462 |
+2.007 |
| 2007-06-18 |
2007-08-09 |
+1.4861 |
+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) |
| 2026-05-12 00:00 |
05:33:21.95 |
+06:29:31.7 |
HIP 26170 |
21.13 |
| 2026-05-12 12:00 |
05:33:24.36 |
+06:29:41.5 |
HIP 26170 |
20.51 |
| 2026-05-13 00:00 |
05:33:26.78 |
+06:29:51.1 |
HIP 26170 |
19.89 |
| 2026-05-13 12:00 |
05:33:29.22 |
+06:30:00.7 |
HIP 26170 |
19.27 |
| 2026-05-14 00:00 |
05:33:31.66 |
+06:30:10.1 |
HIP 26170 |
18.64 |
| 2026-05-14 12:00 |
05:33:34.13 |
+06:30:19.5 |
HIP 26170 |
18.02 |
| 2026-05-15 00:00 |
05:33:36.60 |
+06:30:28.8 |
HIP 26170 |
17.38 |
| 2026-05-15 12:00 |
05:33:39.08 |
+06:30:38.0 |
HIP 26170 |
16.75 |
| 2026-05-16 00:00 |
05:33:41.58 |
+06:30:47.1 |
HIP 26170 |
16.11 |
| 2026-05-16 12:00 |
05:33:44.09 |
+06:30:56.1 |
HIP 26170 |
15.48 |
| 2026-05-17 00:00 |
05:33:46.61 |
+06:31:05.0 |
HIP 26170 |
14.83 |
| 2026-05-17 12:00 |
05:33:49.14 |
+06:31:13.9 |
HIP 26170 |
14.19 |
| 2026-05-18 00:00 |
05:33:51.69 |
+06:31:22.6 |
HIP 26170 |
13.55 |
| 2026-05-18 12:00 |
05:33:54.24 |
+06:31:31.2 |
HIP 26170 |
12.90 |
| 2026-05-19 00:00 |
05:33:56.80 |
+06:31:39.8 |
HIP 26170 |
12.25 |
| 2026-05-19 12:00 |
05:33:59.38 |
+06:31:48.3 |
HIP 26170 |
11.59 |
| 2026-05-20 00:00 |
05:34:01.96 |
+06:31:56.6 |
HIP 26170 |
10.94 |
| 2026-05-20 12:00 |
05:34:04.56 |
+06:32:04.9 |
HIP 26170 |
10.28 |
| 2026-05-21 00:00 |
05:34:07.16 |
+06:32:13.1 |
HIP 26170 |
9.63 |
| 2026-05-21 12:00 |
05:34:09.78 |
+06:32:21.1 |
HIP 26170 |
8.97 |
| 2026-05-22 00:00 |
05:34:12.40 |
+06:32:29.1 |
HIP 26170 |
8.31 |
| 2026-05-22 12:00 |
05:34:15.04 |
+06:32:37.0 |
HIP 26170 |
7.64 |
| 2026-05-23 00:00 |
05:34:17.68 |
+06:32:44.8 |
HIP 26170 |
6.98 |
| 2026-05-23 12:00 |
05:34:20.33 |
+06:32:52.5 |
HIP 26170 |
6.31 |
| 2026-05-24 00:00 |
05:34:22.99 |
+06:33:00.1 |
HIP 26170 |
5.65 |
| 2026-05-24 12:00 |
05:34:25.66 |
+06:33:07.6 |
HIP 26170 |
4.98 |
| 2026-05-25 00:00 |
05:34:28.34 |
+06:33:15.0 |
HIP 26170 |
4.31 |
| 2026-05-25 12:00 |
05:34:31.02 |
+06:33:22.3 |
HIP 26170 |
3.65 |
| 2026-05-26 00:00 |
05:34:33.72 |
+06:33:29.5 |
HIP 26170 |
2.99 |
| 2026-05-26 12:00 |
05:34:36.42 |
+06:33:36.6 |
HIP 26170 |
2.34 |
| 2026-05-27 00:00 |
05:34:39.13 |
+06:33:43.6 |
HIP 26170 |
1.71 |
| 2026-05-27 12:00 |
05:34:41.84 |
+06:33:50.5 |
HIP 26170 |
1.14 |
| 2026-05-28 00:00 |
05:34:44.56 |
+06:33:57.3 |
HIP 26170 |
0.78 |
| 2026-05-28 12:00 |
05:34:47.29 |
+06:34:04.0 |
HIP 26170 |
0.93 |
| 2026-05-29 00:00 |
05:34:50.03 |
+06:34:10.6 |
HIP 26170 |
1.43 |
| 2026-05-29 12:00 |
05:34:52.78 |
+06:34:17.1 |
HIP 26170 |
2.05 |
| 2026-05-30 00:00 |
05:34:55.53 |
+06:34:23.5 |
HIP 26170 |
2.70 |
| 2026-05-30 12:00 |
05:34:58.28 |
+06:34:29.8 |
HIP 26170 |
3.37 |
| 2026-05-31 00:00 |
05:35:01.04 |
+06:34:36.0 |
HIP 26170 |
4.05 |
| 2026-05-31 12:00 |
05:35:03.81 |
+06:34:42.1 |
HIP 26170 |
4.73 |
| 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 |