459P/Catalina
| 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) |
| 2026-02-03 00:00 |
19:14:46.52 |
-19:37:53.5 |
HIP 94637 |
13.21 |
| 2026-02-03 12:00 |
19:15:11.33 |
-19:36:52.7 |
HIP 94637 |
10.92 |
| 2026-02-04 00:00 |
19:15:36.08 |
-19:35:51.8 |
HIP 94637 |
11.58 |
| 2026-02-04 12:00 |
19:16:00.77 |
-19:34:50.6 |
HIP 94637 |
14.80 |
| 2026-02-05 00:00 |
19:16:25.41 |
-19:33:49.1 |
HIP 94738 |
15.84 |
| 2026-02-05 12:00 |
19:16:49.99 |
-19:32:47.4 |
HIP 94738 |
14.46 |
| 2026-02-06 00:00 |
19:17:14.50 |
-19:31:45.5 |
HIP 94738 |
15.37 |
| 2026-02-06 12:00 |
19:17:38.96 |
-19:30:43.4 |
HIP 94738 |
18.22 |
| 2026-02-07 00:00 |
19:18:03.35 |
-19:29:41.0 |
HIP 94738 |
22.27 |
| 2026-02-07 12:00 |
19:18:27.68 |
-19:28:38.4 |
HIP 95014 |
22.60 |
| 2026-02-08 00:00 |
19:18:51.95 |
-19:27:35.5 |
HIP 95014 |
16.84 |
| 2026-02-08 12:00 |
19:19:16.15 |
-19:26:32.5 |
HIP 95014 |
11.15 |
| 2026-02-09 00:00 |
19:19:40.29 |
-19:25:29.2 |
HIP 95014 |
5.69 |
| 2026-02-09 12:00 |
19:20:04.36 |
-19:24:25.7 |
HIP 95014 |
2.73 |
| 2026-02-10 00:00 |
19:20:28.37 |
-19:23:22.0 |
HIP 95014 |
7.00 |
| 2026-02-10 12:00 |
19:20:52.31 |
-19:22:18.1 |
HIP 95014 |
12.51 |
| 2026-02-11 00:00 |
19:21:16.18 |
-19:21:14.0 |
HIP 95159 |
8.71 |
| 2026-02-11 12:00 |
19:21:39.98 |
-19:20:09.7 |
HIP 95159 |
6.13 |
| 2026-02-12 00:00 |
19:22:03.71 |
-19:19:05.2 |
HIP 95159 |
8.04 |
| 2026-02-12 12:00 |
19:22:27.36 |
-19:18:00.5 |
HIP 95159 |
12.50 |
| 2026-02-13 00:00 |
19:22:50.95 |
-19:16:55.6 |
HIP 95159 |
17.66 |
| 2026-02-13 12:00 |
19:23:14.46 |
-19:15:50.6 |
HIP 95159 |
23.05 |
| 2026-02-14 00:00 |
19:23:37.90 |
-19:14:45.3 |
HIP 95407 |
22.64 |
| 2026-02-14 12:00 |
19:24:01.27 |
-19:13:39.9 |
HIP 95407 |
19.18 |
| 2026-02-15 00:00 |
19:24:24.56 |
-19:12:34.2 |
HIP 95407 |
16.93 |
| 2026-02-15 12:00 |
19:24:47.77 |
-19:11:28.4 |
HIP 95407 |
16.37 |
| 2026-02-16 00:00 |
19:25:10.90 |
-19:10:22.5 |
HIP 95407 |
17.65 |
| 2026-02-16 12:00 |
19:25:33.96 |
-19:09:16.4 |
HIP 95407 |
20.41 |
| 2026-02-17 00:00 |
19:25:56.93 |
-19:08:10.1 |
HIP 95407 |
24.14 |
| 2026-02-17 12:00 |
19:26:19.83 |
-19:07:03.6 |
HIP 95711 |
27.91 |
| 2026-02-18 00:00 |
19:26:42.65 |
-19:05:57.1 |
HIP 95711 |
24.00 |
| 2026-02-18 12:00 |
19:27:05.38 |
-19:04:50.3 |
HIP 95711 |
20.84 |
| 2026-02-19 00:00 |
19:27:28.03 |
-19:03:43.4 |
HIP 95711 |
18.79 |
| 2026-02-19 12:00 |
19:27:50.59 |
-19:02:36.4 |
HIP 95711 |
18.21 |
| 2026-02-20 00:00 |
19:28:13.07 |
-19:01:29.2 |
HIP 95711 |
19.22 |
| 2026-02-20 12:00 |
19:28:35.47 |
-19:00:21.9 |
HIP 95711 |
21.58 |
| 2026-02-21 00:00 |
19:28:57.77 |
-18:59:14.5 |
HIP 95711 |
24.91 |
| 2026-02-21 12:00 |
19:29:20.00 |
-18:58:07.0 |
HIP 95711 |
28.85 |
| 2026-02-22 00:00 |
19:29:42.13 |
-18:56:59.3 |
HIP 95711 |
33.18 |
| 2026-02-22 12:00 |
19:30:04.17 |
-18:55:51.5 |
HIP 96064 |
31.33 |
| 2026-02-23 00:00 |
19:30:26.12 |
-18:54:43.6 |
HIP 96064 |
26.38 |
| 2026-02-23 12:00 |
19:30:47.98 |
-18:53:35.6 |
HIP 96064 |
21.61 |
| 2026-02-24 00:00 |
19:31:09.75 |
-18:52:27.5 |
HIP 96064 |
17.18 |