| Parameter |
Value |
| Designation |
C/2014 S3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-08-13T07:42:24.215040Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:07Z |
| Obs used |
48 |
| NEO |
- |
| M1 |
17.500 |
| K1 |
8.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-10-08.0000000 |
| e |
0.97675738 |
| q (au) |
2.049265 |
| a (au) |
88.168442 |
| i (deg) |
169.320625 |
| Ω (om, deg) |
356.051072 |
| ω (w, deg) |
293.142060 |
| M (ma, deg) |
0.066286 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.884 + 3.181\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.884 |
| n |
3.181 |
| gf |
0.984 |
| gb |
-0.557 |
| k |
0.999 |
| δ90 |
9.807 |
| 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 |
18:15:57.99 |
-12:23:52.9 |
HIP 89436 |
12.84 |
| 2026-06-01 12:00 |
18:15:53.28 |
-12:23:49.5 |
HIP 89436 |
11.88 |
| 2026-06-02 00:00 |
18:15:48.56 |
-12:23:46.1 |
HIP 89436 |
10.94 |
| 2026-06-02 12:00 |
18:15:43.82 |
-12:23:42.9 |
HIP 89436 |
10.05 |
| 2026-06-03 00:00 |
18:15:39.07 |
-12:23:39.7 |
HIP 89436 |
9.22 |
| 2026-06-03 12:00 |
18:15:34.30 |
-12:23:36.7 |
HIP 89436 |
8.46 |
| 2026-06-04 00:00 |
18:15:29.52 |
-12:23:33.7 |
HIP 89436 |
7.80 |
| 2026-06-04 12:00 |
18:15:24.72 |
-12:23:30.9 |
HIP 89436 |
7.26 |
| 2026-06-05 00:00 |
18:15:19.91 |
-12:23:28.2 |
HIP 89436 |
6.88 |
| 2026-06-05 12:00 |
18:15:15.08 |
-12:23:25.6 |
HIP 89436 |
6.69 |
| 2026-06-06 00:00 |
18:15:10.25 |
-12:23:23.0 |
HIP 89436 |
6.70 |
| 2026-06-06 12:00 |
18:15:05.39 |
-12:23:20.6 |
HIP 89436 |
6.91 |
| 2026-06-07 00:00 |
18:15:00.53 |
-12:23:18.3 |
HIP 89436 |
7.31 |
| 2026-06-07 12:00 |
18:14:55.65 |
-12:23:16.1 |
HIP 89436 |
7.87 |
| 2026-06-08 00:00 |
18:14:50.76 |
-12:23:14.0 |
HIP 89436 |
8.56 |
| 2026-06-08 12:00 |
18:14:45.86 |
-12:23:12.0 |
HIP 89436 |
9.36 |
| 2026-06-09 00:00 |
18:14:40.95 |
-12:23:10.1 |
HIP 89436 |
10.23 |
| 2026-06-09 12:00 |
18:14:36.03 |
-12:23:08.3 |
HIP 89436 |
11.17 |
| 2026-06-10 00:00 |
18:14:31.09 |
-12:23:06.7 |
HIP 89436 |
12.15 |
| 2026-06-10 12:00 |
18:14:26.15 |
-12:23:05.1 |
HIP 89436 |
13.17 |
| 2026-06-11 00:00 |
18:14:21.19 |
-12:23:03.6 |
HIP 89436 |
14.23 |
| 2026-06-11 12:00 |
18:14:16.23 |
-12:23:02.3 |
HIP 89436 |
15.30 |
| 2026-06-12 00:00 |
18:14:11.26 |
-12:23:01.0 |
HIP 89436 |
16.40 |
| 2026-06-12 12:00 |
18:14:06.27 |
-12:22:59.9 |
HIP 89436 |
17.51 |
| 2026-06-13 00:00 |
18:14:01.28 |
-12:22:58.8 |
HIP 89436 |
18.64 |
| 2026-06-13 12:00 |
18:13:56.29 |
-12:22:57.9 |
HIP 89436 |
19.78 |
| 2026-06-14 00:00 |
18:13:51.28 |
-12:22:57.1 |
HIP 89436 |
20.93 |
| 2026-06-14 12:00 |
18:13:46.27 |
-12:22:56.4 |
HIP 89436 |
22.09 |
| 2026-06-15 00:00 |
18:13:41.25 |
-12:22:55.8 |
HIP 89436 |
23.25 |
| 2026-06-15 12:00 |
18:13:36.22 |
-12:22:55.3 |
HIP 89436 |
24.43 |
| 2026-06-16 00:00 |
18:13:31.19 |
-12:22:54.9 |
HIP 89436 |
25.61 |
| 2026-06-16 12:00 |
18:13:26.15 |
-12:22:54.6 |
HIP 89436 |
26.79 |
| 2026-06-17 00:00 |
18:13:21.11 |
-12:22:54.5 |
HIP 89436 |
27.98 |
| 2026-06-17 12:00 |
18:13:16.06 |
-12:22:54.4 |
HIP 89436 |
29.17 |
| 2026-06-18 00:00 |
18:13:11.01 |
-12:22:54.4 |
HIP 89436 |
30.37 |
| 2026-06-18 12:00 |
18:13:05.95 |
-12:22:54.6 |
HIP 89436 |
31.57 |
| 2026-06-19 00:00 |
18:13:00.89 |
-12:22:54.8 |
HIP 89436 |
32.77 |
| 2026-06-19 12:00 |
18:12:55.83 |
-12:22:55.2 |
HIP 89436 |
33.98 |
| 2026-06-20 00:00 |
18:12:50.76 |
-12:22:55.7 |
HIP 89436 |
35.19 |
| 2026-06-20 12:00 |
18:12:45.69 |
-12:22:56.3 |
HIP 89436 |
36.40 |
| 2026-06-21 00:00 |
18:12:40.62 |
-12:22:56.9 |
HIP 89436 |
37.61 |
| 2026-06-21 12:00 |
18:12:35.55 |
-12:22:57.7 |
HIP 89436 |
38.83 |
| 2026-06-22 00:00 |
18:12:30.47 |
-12:22:58.6 |
HIP 89436 |
40.04 |