| Parameter |
Value |
| Designation |
C/2014 W6 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-03-19T00:07:11.818560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:03Z |
| Obs used |
139 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-01-30.0000000 |
| e |
1.00174154 |
| q (au) |
3.087625 |
| a (au) |
-1772.929151 |
| i (deg) |
53.564298 |
| Ω (om, deg) |
338.129791 |
| ω (w, deg) |
209.854804 |
| M (ma, deg) |
-0.000634 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.657 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.657 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
22:31:45.49 |
-18:38:31.2 |
HIP 111406 |
34.44 |
| 2026-03-26 12:00 |
22:31:49.54 |
-18:38:08.2 |
HIP 111406 |
33.52 |
| 2026-03-27 00:00 |
22:31:53.57 |
-18:37:45.3 |
HIP 111406 |
32.61 |
| 2026-03-27 12:00 |
22:31:57.59 |
-18:37:22.7 |
HIP 111406 |
31.71 |
| 2026-03-28 00:00 |
22:32:01.58 |
-18:37:00.2 |
HIP 111406 |
30.82 |
| 2026-03-28 12:00 |
22:32:05.56 |
-18:36:38.0 |
HIP 111406 |
29.94 |
| 2026-03-29 00:00 |
22:32:09.51 |
-18:36:15.9 |
HIP 111406 |
29.07 |
| 2026-03-29 12:00 |
22:32:13.45 |
-18:35:54.0 |
HIP 111406 |
28.22 |
| 2026-03-30 00:00 |
22:32:17.36 |
-18:35:32.3 |
HIP 111406 |
27.39 |
| 2026-03-30 12:00 |
22:32:21.26 |
-18:35:10.7 |
HIP 111406 |
26.56 |
| 2026-03-31 00:00 |
22:32:25.13 |
-18:34:49.4 |
HIP 111406 |
25.76 |
| 2026-03-31 12:00 |
22:32:28.99 |
-18:34:28.2 |
HIP 111406 |
24.97 |
| 2026-04-01 00:00 |
22:32:32.82 |
-18:34:07.3 |
HIP 111406 |
24.19 |
| 2026-04-01 12:00 |
22:32:36.63 |
-18:33:46.5 |
HIP 111406 |
23.44 |
| 2026-04-02 00:00 |
22:32:40.42 |
-18:33:25.9 |
HIP 111406 |
22.70 |
| 2026-04-02 12:00 |
22:32:44.19 |
-18:33:05.5 |
HIP 111406 |
21.99 |
| 2026-04-03 00:00 |
22:32:47.94 |
-18:32:45.3 |
HIP 111406 |
21.30 |
| 2026-04-03 12:00 |
22:32:51.66 |
-18:32:25.3 |
HIP 111406 |
20.63 |
| 2026-04-04 00:00 |
22:32:55.36 |
-18:32:05.5 |
HIP 111406 |
19.99 |
| 2026-04-04 12:00 |
22:32:59.04 |
-18:31:45.9 |
HIP 111406 |
19.38 |
| 2026-04-05 00:00 |
22:33:02.70 |
-18:31:26.5 |
HIP 111406 |
18.79 |
| 2026-04-05 12:00 |
22:33:06.34 |
-18:31:07.3 |
HIP 111406 |
18.23 |
| 2026-04-06 00:00 |
22:33:09.95 |
-18:30:48.2 |
HIP 111406 |
17.71 |
| 2026-04-06 12:00 |
22:33:13.53 |
-18:30:29.4 |
HIP 111406 |
17.22 |
| 2026-04-07 00:00 |
22:33:17.10 |
-18:30:10.8 |
HIP 111406 |
16.77 |
| 2026-04-07 12:00 |
22:33:20.64 |
-18:29:52.4 |
HIP 111406 |
16.36 |
| 2026-04-08 00:00 |
22:33:24.15 |
-18:29:34.2 |
HIP 111406 |
15.99 |
| 2026-04-08 12:00 |
22:33:27.64 |
-18:29:16.2 |
HIP 111406 |
15.66 |
| 2026-04-09 00:00 |
22:33:31.11 |
-18:28:58.4 |
HIP 111406 |
15.38 |
| 2026-04-09 12:00 |
22:33:34.55 |
-18:28:40.8 |
HIP 111406 |
15.14 |
| 2026-04-10 00:00 |
22:33:37.97 |
-18:28:23.4 |
HIP 111406 |
14.95 |
| 2026-04-10 12:00 |
22:33:41.36 |
-18:28:06.2 |
HIP 111406 |
14.80 |
| 2026-04-11 00:00 |
22:33:44.73 |
-18:27:49.2 |
HIP 111406 |
14.70 |
| 2026-04-11 12:00 |
22:33:48.07 |
-18:27:32.4 |
HIP 111406 |
14.65 |
| 2026-04-12 00:00 |
22:33:51.38 |
-18:27:15.9 |
HIP 111406 |
14.65 |
| 2026-04-12 12:00 |
22:33:54.67 |
-18:26:59.5 |
HIP 111406 |
14.69 |
| 2026-04-13 00:00 |
22:33:57.93 |
-18:26:43.4 |
HIP 111406 |
14.78 |
| 2026-04-13 12:00 |
22:34:01.16 |
-18:26:27.5 |
HIP 111406 |
14.90 |
| 2026-04-14 00:00 |
22:34:04.37 |
-18:26:11.8 |
HIP 111406 |
15.07 |
| 2026-04-14 12:00 |
22:34:07.55 |
-18:25:56.3 |
HIP 111477 |
14.75 |
| 2026-04-15 00:00 |
22:34:10.71 |
-18:25:41.0 |
HIP 111477 |
13.99 |
| 2026-04-15 12:00 |
22:34:13.83 |
-18:25:25.9 |
HIP 111477 |
13.24 |
| 2026-04-16 00:00 |
22:34:16.93 |
-18:25:11.1 |
HIP 111477 |
12.50 |