| Parameter |
Value |
| Designation |
P/2014 O3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-04-17T13:13:10.761600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:57Z |
| Obs used |
53 |
| NEO |
- |
| M1 |
14.100 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-07-17.0000000 |
| e |
0.38501995 |
| q (au) |
4.640620 |
| a (au) |
7.545968 |
| i (deg) |
7.806572 |
| Ω (om, deg) |
87.704076 |
| ω (w, deg) |
204.364367 |
| M (ma, deg) |
4.300672 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.936 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.936 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.855 |
| k |
0.800 |
| δ90 |
9.991 |
| 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) |
| 2026-03-26 00:00 |
08:12:34.07 |
+25:01:31.0 |
HIP 40157 |
11.48 |
| 2026-03-26 12:00 |
08:12:31.47 |
+25:01:29.8 |
HIP 40157 |
11.17 |
| 2026-03-27 00:00 |
08:12:28.97 |
+25:01:28.2 |
HIP 40157 |
10.89 |
| 2026-03-27 12:00 |
08:12:26.57 |
+25:01:26.2 |
HIP 40157 |
10.65 |
| 2026-03-28 00:00 |
08:12:24.28 |
+25:01:23.9 |
HIP 40157 |
10.45 |
| 2026-03-28 12:00 |
08:12:22.10 |
+25:01:21.3 |
HIP 40157 |
10.29 |
| 2026-03-29 00:00 |
08:12:20.02 |
+25:01:18.3 |
HIP 40157 |
10.16 |
| 2026-03-29 12:00 |
08:12:18.04 |
+25:01:14.9 |
HIP 40157 |
10.06 |
| 2026-03-30 00:00 |
08:12:16.17 |
+25:01:11.2 |
HIP 40157 |
10.00 |
| 2026-03-30 12:00 |
08:12:14.40 |
+25:01:07.1 |
HIP 40157 |
9.97 |
| 2026-03-31 00:00 |
08:12:12.74 |
+25:01:02.7 |
HIP 40157 |
9.96 |
| 2026-03-31 12:00 |
08:12:11.19 |
+25:00:57.9 |
HIP 40157 |
9.98 |
| 2026-04-01 00:00 |
08:12:09.74 |
+25:00:52.7 |
HIP 40157 |
10.02 |
| 2026-04-01 12:00 |
08:12:08.39 |
+25:00:47.3 |
HIP 40157 |
10.08 |
| 2026-04-02 00:00 |
08:12:07.15 |
+25:00:41.4 |
HIP 40157 |
10.15 |
| 2026-04-02 12:00 |
08:12:06.02 |
+25:00:35.3 |
HIP 40157 |
10.24 |
| 2026-04-03 00:00 |
08:12:04.99 |
+25:00:28.7 |
HIP 40157 |
10.34 |
| 2026-04-03 12:00 |
08:12:04.07 |
+25:00:21.9 |
HIP 40157 |
10.46 |
| 2026-04-04 00:00 |
08:12:03.25 |
+25:00:14.7 |
HIP 40157 |
10.58 |
| 2026-04-04 12:00 |
08:12:02.54 |
+25:00:07.1 |
HIP 40157 |
10.71 |
| 2026-04-05 00:00 |
08:12:01.93 |
+24:59:59.3 |
HIP 40157 |
10.85 |
| 2026-04-05 12:00 |
08:12:01.43 |
+24:59:51.0 |
HIP 40157 |
10.99 |
| 2026-04-06 00:00 |
08:12:01.03 |
+24:59:42.5 |
HIP 40157 |
11.14 |
| 2026-04-06 12:00 |
08:12:00.74 |
+24:59:33.6 |
HIP 40157 |
11.29 |
| 2026-04-07 00:00 |
08:12:00.55 |
+24:59:24.4 |
HIP 40157 |
11.45 |
| 2026-04-07 12:00 |
08:12:00.47 |
+24:59:14.8 |
HIP 40157 |
11.61 |
| 2026-04-08 00:00 |
08:12:00.49 |
+24:59:04.9 |
HIP 40157 |
11.77 |
| 2026-04-08 12:00 |
08:12:00.62 |
+24:58:54.7 |
HIP 40157 |
11.94 |
| 2026-04-09 00:00 |
08:12:00.86 |
+24:58:44.2 |
HIP 40157 |
12.11 |
| 2026-04-09 12:00 |
08:12:01.20 |
+24:58:33.3 |
HIP 40157 |
12.29 |
| 2026-04-10 00:00 |
08:12:01.64 |
+24:58:22.1 |
HIP 40157 |
12.47 |
| 2026-04-10 12:00 |
08:12:02.19 |
+24:58:10.6 |
HIP 40157 |
12.65 |
| 2026-04-11 00:00 |
08:12:02.85 |
+24:57:58.7 |
HIP 40157 |
12.85 |
| 2026-04-11 12:00 |
08:12:03.61 |
+24:57:46.5 |
HIP 40157 |
13.05 |
| 2026-04-12 00:00 |
08:12:04.47 |
+24:57:34.0 |
HIP 40157 |
13.25 |
| 2026-04-12 12:00 |
08:12:05.44 |
+24:57:21.2 |
HIP 40157 |
13.47 |
| 2026-04-13 00:00 |
08:12:06.52 |
+24:57:08.1 |
HIP 40157 |
13.70 |
| 2026-04-13 12:00 |
08:12:07.70 |
+24:56:54.6 |
HIP 40157 |
13.93 |
| 2026-04-14 00:00 |
08:12:08.98 |
+24:56:40.8 |
HIP 40157 |
14.18 |
| 2026-04-14 12:00 |
08:12:10.37 |
+24:56:26.8 |
HIP 40157 |
14.44 |
| 2026-04-15 00:00 |
08:12:11.86 |
+24:56:12.3 |
HIP 40157 |
14.71 |
| 2026-04-15 12:00 |
08:12:13.46 |
+24:55:57.6 |
HIP 40157 |
15.00 |
| 2026-04-16 00:00 |
08:12:15.16 |
+24:55:42.6 |
HIP 40157 |
15.31 |