| Parameter |
Value |
| Designation |
C/2006 CK10 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-07-03T06:42:20.756160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
321 |
| NEO |
- |
| M1 |
15.100 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2006-05-25.0000000 |
| e |
0.99190031 |
| q (au) |
1.752169 |
| a (au) |
216.325607 |
| i (deg) |
144.262762 |
| Ω (om, deg) |
243.809967 |
| ω (w, deg) |
143.456329 |
| M (ma, deg) |
359.987832 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
20:46:59.19 |
-49:51:16.7 |
HIP 102676 |
14.67 |
| 2026-05-12 12:00 |
20:46:58.05 |
-49:51:42.4 |
HIP 102676 |
14.67 |
| 2026-05-13 00:00 |
20:46:56.87 |
-49:52:08.2 |
HIP 102676 |
14.70 |
| 2026-05-13 12:00 |
20:46:55.66 |
-49:52:34.1 |
HIP 102676 |
14.74 |
| 2026-05-14 00:00 |
20:46:54.40 |
-49:53:00.0 |
HIP 102676 |
14.81 |
| 2026-05-14 12:00 |
20:46:53.11 |
-49:53:26.0 |
HIP 102676 |
14.90 |
| 2026-05-15 00:00 |
20:46:51.78 |
-49:53:52.0 |
HIP 102676 |
15.01 |
| 2026-05-15 12:00 |
20:46:50.41 |
-49:54:18.0 |
HIP 102676 |
15.14 |
| 2026-05-16 00:00 |
20:46:49.00 |
-49:54:44.1 |
HIP 102676 |
15.29 |
| 2026-05-16 12:00 |
20:46:47.55 |
-49:55:10.2 |
HIP 102676 |
15.46 |
| 2026-05-17 00:00 |
20:46:46.07 |
-49:55:36.4 |
HIP 102676 |
15.64 |
| 2026-05-17 12:00 |
20:46:44.54 |
-49:56:02.5 |
HIP 102676 |
15.85 |
| 2026-05-18 00:00 |
20:46:42.98 |
-49:56:28.7 |
HIP 102676 |
16.08 |
| 2026-05-18 12:00 |
20:46:41.38 |
-49:56:55.0 |
HIP 102676 |
16.33 |
| 2026-05-19 00:00 |
20:46:39.74 |
-49:57:21.2 |
HIP 102676 |
16.59 |
| 2026-05-19 12:00 |
20:46:38.06 |
-49:57:47.5 |
HIP 102676 |
16.87 |
| 2026-05-20 00:00 |
20:46:36.35 |
-49:58:13.8 |
HIP 102676 |
17.17 |
| 2026-05-20 12:00 |
20:46:34.60 |
-49:58:40.1 |
HIP 102676 |
17.49 |
| 2026-05-21 00:00 |
20:46:32.81 |
-49:59:06.4 |
HIP 102676 |
17.82 |
| 2026-05-21 12:00 |
20:46:30.98 |
-49:59:32.8 |
HIP 102676 |
18.16 |
| 2026-05-22 00:00 |
20:46:29.11 |
-49:59:59.1 |
HIP 102676 |
18.52 |
| 2026-05-22 12:00 |
20:46:27.21 |
-50:00:25.5 |
HIP 102676 |
18.90 |
| 2026-05-23 00:00 |
20:46:25.27 |
-50:00:51.9 |
HIP 102676 |
19.28 |
| 2026-05-23 12:00 |
20:46:23.30 |
-50:01:18.2 |
HIP 102676 |
19.68 |
| 2026-05-24 00:00 |
20:46:21.28 |
-50:01:44.6 |
HIP 102676 |
20.10 |
| 2026-05-24 12:00 |
20:46:19.23 |
-50:02:11.0 |
HIP 102676 |
20.52 |
| 2026-05-25 00:00 |
20:46:17.14 |
-50:02:37.4 |
HIP 102676 |
20.96 |
| 2026-05-25 12:00 |
20:46:15.02 |
-50:03:03.7 |
HIP 102676 |
21.40 |
| 2026-05-26 00:00 |
20:46:12.86 |
-50:03:30.1 |
HIP 102676 |
21.86 |
| 2026-05-26 12:00 |
20:46:10.67 |
-50:03:56.5 |
HIP 102676 |
22.33 |
| 2026-05-27 00:00 |
20:46:08.43 |
-50:04:22.8 |
HIP 102676 |
22.80 |
| 2026-05-27 12:00 |
20:46:06.16 |
-50:04:49.2 |
HIP 102676 |
23.29 |
| 2026-05-28 00:00 |
20:46:03.86 |
-50:05:15.5 |
HIP 102676 |
23.79 |
| 2026-05-28 12:00 |
20:46:01.52 |
-50:05:41.8 |
HIP 102676 |
24.29 |
| 2026-05-29 00:00 |
20:45:59.15 |
-50:06:08.1 |
HIP 102676 |
24.80 |
| 2026-05-29 12:00 |
20:45:56.73 |
-50:06:34.4 |
HIP 102396 |
24.59 |
| 2026-05-30 00:00 |
20:45:54.29 |
-50:07:00.6 |
HIP 102396 |
24.04 |
| 2026-05-30 12:00 |
20:45:51.81 |
-50:07:26.8 |
HIP 102396 |
23.48 |
| 2026-05-31 00:00 |
20:45:49.29 |
-50:07:53.0 |
HIP 102396 |
22.93 |
| 2026-05-31 12:00 |
20:45:46.74 |
-50:08:19.2 |
HIP 102396 |
22.38 |
| 2026-06-01 00:00 |
20:45:44.15 |
-50:08:45.4 |
HIP 102396 |
21.82 |
| 2026-06-01 12:00 |
20:45:41.53 |
-50:09:11.5 |
HIP 102396 |
21.27 |
| 2026-06-02 00:00 |
20:45:38.88 |
-50:09:37.6 |
HIP 102396 |
20.73 |