| Parameter |
Value |
| Designation |
C/2014 A5 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-08-13T12:40:53.086080Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:06Z |
| Obs used |
42 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
17.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-08-21.0000000 |
| e |
0.96039227 |
| q (au) |
4.800361 |
| a (au) |
121.197575 |
| i (deg) |
31.993327 |
| Ω (om, deg) |
310.103183 |
| ω (w, deg) |
182.581087 |
| M (ma, deg) |
0.005519 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.124 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.124 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.615 |
| k |
0.800 |
| 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) |
| 2026-09-20 00:00 |
17:37:00.64 |
-45:57:17.1 |
HIP 86243 |
9.59 |
| 2026-09-20 12:00 |
17:37:01.89 |
-45:56:46.6 |
HIP 86243 |
9.04 |
| 2026-09-21 00:00 |
17:37:03.20 |
-45:56:16.1 |
HIP 86243 |
8.48 |
| 2026-09-21 12:00 |
17:37:04.57 |
-45:55:45.7 |
HIP 86243 |
7.92 |
| 2026-09-22 00:00 |
17:37:05.99 |
-45:55:15.4 |
HIP 86243 |
7.36 |
| 2026-09-22 12:00 |
17:37:07.47 |
-45:54:45.1 |
HIP 86243 |
6.79 |
| 2026-09-23 00:00 |
17:37:09.01 |
-45:54:14.9 |
HIP 86243 |
6.22 |
| 2026-09-23 12:00 |
17:37:10.60 |
-45:53:44.7 |
HIP 86243 |
5.65 |
| 2026-09-24 00:00 |
17:37:12.26 |
-45:53:14.6 |
HIP 86243 |
5.07 |
| 2026-09-24 12:00 |
17:37:13.96 |
-45:52:44.6 |
HIP 86243 |
4.49 |
| 2026-09-25 00:00 |
17:37:15.73 |
-45:52:14.7 |
HIP 86243 |
3.90 |
| 2026-09-25 12:00 |
17:37:17.55 |
-45:51:44.8 |
HIP 86243 |
3.32 |
| 2026-09-26 00:00 |
17:37:19.43 |
-45:51:15.0 |
HIP 86243 |
2.73 |
| 2026-09-26 12:00 |
17:37:21.36 |
-45:50:45.3 |
HIP 86243 |
2.13 |
| 2026-09-27 00:00 |
17:37:23.35 |
-45:50:15.7 |
HIP 86243 |
1.55 |
| 2026-09-27 12:00 |
17:37:25.39 |
-45:49:46.1 |
HIP 86243 |
0.98 |
| 2026-09-28 00:00 |
17:37:27.49 |
-45:49:16.6 |
HIP 86243 |
0.52 |
| 2026-09-28 12:00 |
17:37:29.65 |
-45:48:47.2 |
HIP 86243 |
0.59 |
| 2026-09-29 00:00 |
17:37:31.86 |
-45:48:17.9 |
HIP 86243 |
1.09 |
| 2026-09-29 12:00 |
17:37:34.12 |
-45:47:48.7 |
HIP 86243 |
1.69 |
| 2026-09-30 00:00 |
17:37:36.44 |
-45:47:19.5 |
HIP 86243 |
2.31 |
| 2026-09-30 12:00 |
17:37:38.82 |
-45:46:50.5 |
HIP 86243 |
2.94 |
| 2026-10-01 00:00 |
17:37:41.25 |
-45:46:21.5 |
HIP 86243 |
3.57 |
| 2026-10-01 12:00 |
17:37:43.73 |
-45:45:52.6 |
HIP 86243 |
4.22 |
| 2026-10-02 00:00 |
17:37:46.27 |
-45:45:23.8 |
HIP 86243 |
4.87 |
| 2026-10-02 12:00 |
17:37:48.87 |
-45:44:55.2 |
HIP 86243 |
5.53 |
| 2026-10-03 00:00 |
17:37:51.51 |
-45:44:26.6 |
HIP 86243 |
6.19 |
| 2026-10-03 12:00 |
17:37:54.21 |
-45:43:58.1 |
HIP 86243 |
6.86 |
| 2026-10-04 00:00 |
17:37:56.97 |
-45:43:29.7 |
HIP 86243 |
7.54 |
| 2026-10-04 12:00 |
17:37:59.78 |
-45:43:01.4 |
HIP 86243 |
8.22 |
| 2026-10-05 00:00 |
17:38:02.64 |
-45:42:33.2 |
HIP 86243 |
8.90 |
| 2026-10-05 12:00 |
17:38:05.56 |
-45:42:05.1 |
HIP 86368 |
9.04 |
| 2026-10-06 00:00 |
17:38:08.53 |
-45:41:37.1 |
HIP 86368 |
8.76 |
| 2026-10-06 12:00 |
17:38:11.55 |
-45:41:09.2 |
HIP 86368 |
8.53 |
| 2026-10-07 00:00 |
17:38:14.62 |
-45:40:41.4 |
HIP 86368 |
8.34 |
| 2026-10-07 12:00 |
17:38:17.75 |
-45:40:13.8 |
HIP 86368 |
8.19 |
| 2026-10-08 00:00 |
17:38:20.93 |
-45:39:46.2 |
HIP 86368 |
8.10 |
| 2026-10-08 12:00 |
17:38:24.16 |
-45:39:18.8 |
HIP 86368 |
8.07 |
| 2026-10-09 00:00 |
17:38:27.45 |
-45:38:51.4 |
HIP 86368 |
8.09 |
| 2026-10-09 12:00 |
17:38:30.78 |
-45:38:24.2 |
HIP 86368 |
8.18 |
| 2026-10-10 00:00 |
17:38:34.17 |
-45:37:57.1 |
HIP 86368 |
8.32 |
| 2026-10-10 12:00 |
17:38:37.61 |
-45:37:30.1 |
HIP 86368 |
8.52 |
| 2026-10-11 00:00 |
17:38:41.10 |
-45:37:03.3 |
HIP 86368 |
8.78 |