| Parameter |
Value |
| Designation |
459P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-01-28T07:40:35.670720Z |
| Orbit solution date (soln_date, UTC) |
2024-07-07T00:42:23Z |
| Obs used |
1061 |
| NEO |
- |
| M1 |
17.200 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2010-10-08T10:01:56.064000Z |
| Discovery magnitude (MPC) |
20.10 V |
| Discovery observatory (MPC) |
691 · Steward Observatory, Kitt Peak-Spacewatch |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-12-21.0000000 |
| e |
0.52243972 |
| q (au) |
1.600719 |
| a (au) |
3.351867 |
| i (deg) |
13.708393 |
| Ω (om, deg) |
272.043349 |
| ω (w, deg) |
189.881941 |
| M (ma, deg) |
111.091091 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.932 + 2.395\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.932 |
| n |
2.395 |
| gf |
1.000 |
| gb |
-0.887 |
| k |
0.999 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
19:20:29.92 |
-16:53:21.0 |
HIP 95063 |
9.33 |
| 2026-07-29 12:00 |
19:20:09.96 |
-16:53:57.7 |
HIP 95063 |
10.15 |
| 2026-07-30 00:00 |
19:19:50.09 |
-16:54:34.4 |
HIP 95063 |
12.85 |
| 2026-07-30 12:00 |
19:19:30.31 |
-16:55:11.1 |
HIP 95063 |
16.50 |
| 2026-07-31 00:00 |
19:19:10.64 |
-16:55:47.8 |
HIP 94839 |
19.10 |
| 2026-07-31 12:00 |
19:18:51.05 |
-16:56:24.5 |
HIP 94839 |
14.46 |
| 2026-08-01 00:00 |
19:18:31.58 |
-16:57:01.2 |
HIP 94839 |
9.91 |
| 2026-08-01 12:00 |
19:18:12.20 |
-16:57:37.9 |
HIP 94839 |
5.63 |
| 2026-08-02 00:00 |
19:17:52.93 |
-16:58:14.6 |
HIP 94839 |
3.00 |
| 2026-08-02 12:00 |
19:17:33.78 |
-16:58:51.3 |
HIP 94839 |
5.41 |
| 2026-08-03 00:00 |
19:17:14.73 |
-16:59:27.9 |
HIP 94839 |
9.58 |
| 2026-08-03 12:00 |
19:16:55.80 |
-17:00:04.5 |
HIP 94706 |
10.05 |
| 2026-08-04 00:00 |
19:16:36.99 |
-17:00:41.1 |
HIP 94706 |
5.90 |
| 2026-08-04 12:00 |
19:16:18.30 |
-17:01:17.7 |
HIP 94706 |
3.15 |
| 2026-08-05 00:00 |
19:15:59.73 |
-17:01:54.2 |
HIP 94706 |
5.05 |
| 2026-08-05 12:00 |
19:15:41.29 |
-17:02:30.7 |
HIP 94706 |
8.98 |
| 2026-08-06 00:00 |
19:15:22.97 |
-17:03:07.2 |
HIP 94647 |
11.83 |
| 2026-08-06 12:00 |
19:15:04.79 |
-17:03:43.6 |
HIP 94647 |
13.96 |
| 2026-08-07 00:00 |
19:14:46.74 |
-17:04:19.9 |
HIP 94647 |
16.95 |
| 2026-08-07 12:00 |
19:14:28.83 |
-17:04:56.2 |
HIP 94435 |
17.63 |
| 2026-08-08 00:00 |
19:14:11.05 |
-17:05:32.4 |
HIP 94435 |
13.35 |
| 2026-08-08 12:00 |
19:13:53.42 |
-17:06:08.5 |
HIP 94435 |
9.12 |
| 2026-08-09 00:00 |
19:13:35.93 |
-17:06:44.6 |
HIP 94435 |
4.95 |
| 2026-08-09 12:00 |
19:13:18.59 |
-17:07:20.6 |
HIP 94435 |
1.28 |
| 2026-08-10 00:00 |
19:13:01.40 |
-17:07:56.6 |
HIP 94435 |
3.68 |
| 2026-08-10 12:00 |
19:12:44.35 |
-17:08:32.4 |
HIP 94435 |
7.71 |
| 2026-08-11 00:00 |
19:12:27.47 |
-17:09:08.1 |
HIP 94435 |
11.76 |
| 2026-08-11 12:00 |
19:12:10.74 |
-17:09:43.8 |
HIP 94435 |
15.78 |
| 2026-08-12 00:00 |
19:11:54.16 |
-17:10:19.4 |
HIP 94435 |
19.78 |
| 2026-08-12 12:00 |
19:11:37.75 |
-17:10:54.8 |
HIP 94435 |
23.74 |
| 2026-08-13 00:00 |
19:11:21.51 |
-17:11:30.2 |
HIP 94435 |
27.66 |
| 2026-08-13 12:00 |
19:11:05.43 |
-17:12:05.4 |
HIP 94110 |
30.71 |
| 2026-08-14 00:00 |
19:10:49.51 |
-17:12:40.5 |
HIP 94110 |
28.22 |
| 2026-08-14 12:00 |
19:10:33.77 |
-17:13:15.5 |
HIP 94049 |
24.93 |
| 2026-08-15 00:00 |
19:10:18.20 |
-17:13:50.4 |
HIP 94049 |
21.17 |
| 2026-08-15 12:00 |
19:10:02.80 |
-17:14:25.1 |
HIP 94049 |
17.46 |
| 2026-08-16 00:00 |
19:09:47.58 |
-17:14:59.8 |
HIP 94049 |
13.79 |
| 2026-08-16 12:00 |
19:09:32.54 |
-17:15:34.2 |
HIP 94049 |
10.17 |
| 2026-08-17 00:00 |
19:09:17.68 |
-17:16:08.6 |
HIP 94049 |
6.62 |
| 2026-08-17 12:00 |
19:09:03.00 |
-17:16:42.8 |
HIP 94049 |
3.21 |
| 2026-08-18 00:00 |
19:08:48.50 |
-17:17:16.8 |
HIP 94049 |
1.40 |
| 2026-08-18 12:00 |
19:08:34.19 |
-17:17:50.8 |
HIP 94049 |
4.23 |
| 2026-08-19 00:00 |
19:08:20.07 |
-17:18:24.5 |
HIP 94049 |
7.56 |