| Parameter |
Value |
| Designation |
C/2006 A1 (Pojmanski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-02-22T04:21:22.887360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
600 |
| NEO |
- |
| M1 |
10.500 |
| K1 |
16.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2006-03-24.0000000 |
| e |
0.99976626 |
| q (au) |
0.555396 |
| a (au) |
2376.082997 |
| i (deg) |
92.736122 |
| Ω (om, deg) |
211.343233 |
| ω (w, deg) |
351.187789 |
| M (ma, deg) |
0.000254 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.583 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.583 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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 |
| 2006-01-04 |
2006-01-23 |
+11.6706 |
+1.828 |
| 2006-01-23 |
2006-02-21 |
-6.7238 |
-1.282 |
| 2006-02-22 |
2006-04-26 |
-8.0722 |
-1.039 |
| 2006-04-26 |
2006-12-12 |
-5.5681 |
-0.447 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
01:32:06.49 |
+33:24:45.7 |
HIP 7012 |
28.48 |
| 2026-07-29 12:00 |
01:32:05.88 |
+33:24:58.5 |
HIP 7216 |
28.33 |
| 2026-07-30 00:00 |
01:32:05.25 |
+33:25:11.2 |
HIP 7216 |
28.18 |
| 2026-07-30 12:00 |
01:32:04.60 |
+33:25:23.8 |
HIP 7216 |
28.04 |
| 2026-07-31 00:00 |
01:32:03.91 |
+33:25:36.2 |
HIP 7216 |
27.91 |
| 2026-07-31 12:00 |
01:32:03.21 |
+33:25:48.4 |
HIP 7216 |
27.78 |
| 2026-08-01 00:00 |
01:32:02.47 |
+33:26:00.6 |
HIP 7216 |
27.66 |
| 2026-08-01 12:00 |
01:32:01.71 |
+33:26:12.5 |
HIP 7216 |
27.55 |
| 2026-08-02 00:00 |
01:32:00.92 |
+33:26:24.3 |
HIP 7216 |
27.44 |
| 2026-08-02 12:00 |
01:32:00.11 |
+33:26:36.0 |
HIP 7216 |
27.34 |
| 2026-08-03 00:00 |
01:31:59.27 |
+33:26:47.5 |
HIP 7216 |
27.24 |
| 2026-08-03 12:00 |
01:31:58.41 |
+33:26:58.9 |
HIP 7216 |
27.16 |
| 2026-08-04 00:00 |
01:31:57.52 |
+33:27:10.1 |
HIP 7216 |
27.07 |
| 2026-08-04 12:00 |
01:31:56.60 |
+33:27:21.2 |
HIP 7216 |
27.00 |
| 2026-08-05 00:00 |
01:31:55.66 |
+33:27:32.1 |
HIP 7216 |
26.93 |
| 2026-08-05 12:00 |
01:31:54.69 |
+33:27:42.9 |
HIP 7216 |
26.87 |
| 2026-08-06 00:00 |
01:31:53.70 |
+33:27:53.5 |
HIP 7216 |
26.82 |
| 2026-08-06 12:00 |
01:31:52.68 |
+33:28:03.9 |
HIP 7216 |
26.78 |
| 2026-08-07 00:00 |
01:31:51.63 |
+33:28:14.2 |
HIP 7216 |
26.74 |
| 2026-08-07 12:00 |
01:31:50.56 |
+33:28:24.3 |
HIP 7216 |
26.71 |
| 2026-08-08 00:00 |
01:31:49.46 |
+33:28:34.3 |
HIP 7216 |
26.69 |
| 2026-08-08 12:00 |
01:31:48.34 |
+33:28:44.1 |
HIP 7216 |
26.68 |
| 2026-08-09 00:00 |
01:31:47.19 |
+33:28:53.7 |
HIP 7216 |
26.67 |
| 2026-08-09 12:00 |
01:31:46.02 |
+33:29:03.2 |
HIP 7216 |
26.68 |
| 2026-08-10 00:00 |
01:31:44.82 |
+33:29:12.5 |
HIP 7216 |
26.69 |
| 2026-08-10 12:00 |
01:31:43.59 |
+33:29:21.7 |
HIP 7216 |
26.71 |
| 2026-08-11 00:00 |
01:31:42.34 |
+33:29:30.6 |
HIP 7216 |
26.74 |
| 2026-08-11 12:00 |
01:31:41.07 |
+33:29:39.5 |
HIP 7216 |
26.78 |
| 2026-08-12 00:00 |
01:31:39.77 |
+33:29:48.1 |
HIP 7216 |
26.83 |
| 2026-08-12 12:00 |
01:31:38.44 |
+33:29:56.6 |
HIP 7216 |
26.88 |
| 2026-08-13 00:00 |
01:31:37.09 |
+33:30:04.9 |
HIP 7216 |
26.95 |
| 2026-08-13 12:00 |
01:31:35.72 |
+33:30:13.0 |
HIP 7216 |
27.02 |
| 2026-08-14 00:00 |
01:31:34.32 |
+33:30:21.0 |
HIP 7216 |
27.10 |
| 2026-08-14 12:00 |
01:31:32.89 |
+33:30:28.7 |
HIP 7216 |
27.19 |
| 2026-08-15 00:00 |
01:31:31.44 |
+33:30:36.4 |
HIP 7216 |
27.30 |
| 2026-08-15 12:00 |
01:31:29.97 |
+33:30:43.8 |
HIP 7216 |
27.41 |
| 2026-08-16 00:00 |
01:31:28.47 |
+33:30:51.1 |
HIP 7012 |
27.49 |
| 2026-08-16 12:00 |
01:31:26.94 |
+33:30:58.1 |
HIP 7012 |
27.42 |
| 2026-08-17 00:00 |
01:31:25.40 |
+33:31:05.0 |
HIP 7012 |
27.34 |
| 2026-08-17 12:00 |
01:31:23.83 |
+33:31:11.8 |
HIP 7012 |
27.27 |
| 2026-08-18 00:00 |
01:31:22.23 |
+33:31:18.3 |
HIP 7012 |
27.20 |
| 2026-08-18 12:00 |
01:31:20.61 |
+33:31:24.7 |
HIP 7012 |
27.12 |
| 2026-08-19 00:00 |
01:31:18.97 |
+33:31:30.9 |
HIP 7012 |
27.05 |