| Parameter |
Value |
| Designation |
C/2014 AA52 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-02-27T15:22:13.177920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:46Z |
| Obs used |
399 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-10-20.0000000 |
| e |
1.00042389 |
| q (au) |
2.002638 |
| a (au) |
-4724.452107 |
| i (deg) |
105.211201 |
| Ω (om, deg) |
330.493052 |
| ω (w, deg) |
292.259254 |
| M (ma, deg) |
-0.000397 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.277 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.277 |
| n |
2.000 |
| gf |
0.997 |
| gb |
-0.501 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-06-01 00:00 |
18:12:09.48 |
+50:35:24.0 |
HIP 89092 |
11.42 |
| 2026-06-01 12:00 |
18:12:02.51 |
+50:35:50.7 |
HIP 89092 |
10.24 |
| 2026-06-02 00:00 |
18:11:55.51 |
+50:36:16.9 |
HIP 89092 |
9.07 |
| 2026-06-02 12:00 |
18:11:48.49 |
+50:36:42.5 |
HIP 89092 |
7.89 |
| 2026-06-03 00:00 |
18:11:41.45 |
+50:37:07.6 |
HIP 89092 |
6.73 |
| 2026-06-03 12:00 |
18:11:34.38 |
+50:37:32.1 |
HIP 89092 |
5.57 |
| 2026-06-04 00:00 |
18:11:27.29 |
+50:37:56.1 |
HIP 89092 |
4.43 |
| 2026-06-04 12:00 |
18:11:20.18 |
+50:38:19.6 |
HIP 89092 |
3.33 |
| 2026-06-05 00:00 |
18:11:13.05 |
+50:38:42.5 |
HIP 89092 |
2.30 |
| 2026-06-05 12:00 |
18:11:05.90 |
+50:39:04.9 |
HIP 89092 |
1.53 |
| 2026-06-06 00:00 |
18:10:58.73 |
+50:39:26.7 |
HIP 89092 |
1.50 |
| 2026-06-06 12:00 |
18:10:51.54 |
+50:39:48.0 |
HIP 89092 |
2.22 |
| 2026-06-07 00:00 |
18:10:44.33 |
+50:40:08.7 |
HIP 89092 |
3.24 |
| 2026-06-07 12:00 |
18:10:37.10 |
+50:40:28.8 |
HIP 89092 |
4.34 |
| 2026-06-08 00:00 |
18:10:29.86 |
+50:40:48.5 |
HIP 89092 |
5.48 |
| 2026-06-08 12:00 |
18:10:22.60 |
+50:41:07.5 |
HIP 89092 |
6.63 |
| 2026-06-09 00:00 |
18:10:15.32 |
+50:41:26.0 |
HIP 89092 |
7.80 |
| 2026-06-09 12:00 |
18:10:08.02 |
+50:41:44.0 |
HIP 89092 |
8.97 |
| 2026-06-10 00:00 |
18:10:00.71 |
+50:42:01.4 |
HIP 89092 |
10.14 |
| 2026-06-10 12:00 |
18:09:53.39 |
+50:42:18.2 |
HIP 89092 |
11.32 |
| 2026-06-11 00:00 |
18:09:46.05 |
+50:42:34.4 |
HIP 89092 |
12.50 |
| 2026-06-11 12:00 |
18:09:38.70 |
+50:42:50.1 |
HIP 89092 |
13.68 |
| 2026-06-12 00:00 |
18:09:31.33 |
+50:43:05.3 |
HIP 89092 |
14.86 |
| 2026-06-12 12:00 |
18:09:23.95 |
+50:43:19.8 |
HIP 89092 |
16.04 |
| 2026-06-13 00:00 |
18:09:16.56 |
+50:43:33.8 |
HIP 88810 |
17.19 |
| 2026-06-13 12:00 |
18:09:09.16 |
+50:43:47.3 |
HIP 88810 |
16.11 |
| 2026-06-14 00:00 |
18:09:01.75 |
+50:44:00.1 |
HIP 88810 |
15.04 |
| 2026-06-14 12:00 |
18:08:54.32 |
+50:44:12.4 |
HIP 88810 |
14.01 |
| 2026-06-15 00:00 |
18:08:46.89 |
+50:44:24.1 |
HIP 88810 |
13.00 |
| 2026-06-15 12:00 |
18:08:39.45 |
+50:44:35.2 |
HIP 88810 |
12.04 |
| 2026-06-16 00:00 |
18:08:32.00 |
+50:44:45.8 |
HIP 88810 |
11.13 |
| 2026-06-16 12:00 |
18:08:24.55 |
+50:44:55.8 |
HIP 88810 |
10.28 |
| 2026-06-17 00:00 |
18:08:17.08 |
+50:45:05.2 |
HIP 88810 |
9.51 |
| 2026-06-17 12:00 |
18:08:09.61 |
+50:45:14.1 |
HIP 88810 |
8.84 |
| 2026-06-18 00:00 |
18:08:02.14 |
+50:45:22.3 |
HIP 88810 |
8.30 |
| 2026-06-18 12:00 |
18:07:54.66 |
+50:45:30.0 |
HIP 88810 |
7.91 |
| 2026-06-19 00:00 |
18:07:47.17 |
+50:45:37.1 |
HIP 88810 |
7.70 |
| 2026-06-19 12:00 |
18:07:39.69 |
+50:45:43.7 |
HIP 88810 |
7.68 |
| 2026-06-20 00:00 |
18:07:32.19 |
+50:45:49.6 |
HIP 88732 |
7.06 |
| 2026-06-20 12:00 |
18:07:24.70 |
+50:45:55.0 |
HIP 88732 |
6.01 |
| 2026-06-21 00:00 |
18:07:17.20 |
+50:45:59.8 |
HIP 88732 |
5.03 |
| 2026-06-21 12:00 |
18:07:09.71 |
+50:46:04.1 |
HIP 88732 |
4.17 |
| 2026-06-22 00:00 |
18:07:02.21 |
+50:46:07.7 |
HIP 88732 |
3.51 |