| Parameter |
Value |
| Designation |
C/2014 R3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-08-08T05:34:28.655040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:59Z |
| Obs used |
830 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
8.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2017-04-03.0000000 |
| e |
0.99948030 |
| q (au) |
7.275646 |
| a (au) |
13999.773040 |
| i (deg) |
90.839681 |
| Ω (om, deg) |
334.108495 |
| ω (w, deg) |
113.426046 |
| M (ma, deg) |
0.000141 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.131 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.131 |
| n |
6.000 |
| gf |
0.987 |
| gb |
-0.825 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2014-09-06 |
2016-08-05 |
+27.2341 |
-23.512 |
| 2016-08-10 |
2020-02-27 |
+1.4895 |
-1.473 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
09:10:37.28 |
-28:13:41.9 |
HIP 45051 |
2.81 |
| 2026-03-26 12:00 |
09:10:32.59 |
-28:12:57.0 |
HIP 45051 |
1.91 |
| 2026-03-27 00:00 |
09:10:27.94 |
-28:12:11.9 |
HIP 45051 |
1.62 |
| 2026-03-27 12:00 |
09:10:23.35 |
-28:11:26.6 |
HIP 45051 |
2.19 |
| 2026-03-28 00:00 |
09:10:18.79 |
-28:10:41.1 |
HIP 45051 |
3.17 |
| 2026-03-28 12:00 |
09:10:14.29 |
-28:09:55.4 |
HIP 45051 |
4.30 |
| 2026-03-29 00:00 |
09:10:09.83 |
-28:09:09.6 |
HIP 45051 |
5.46 |
| 2026-03-29 12:00 |
09:10:05.43 |
-28:08:23.5 |
HIP 45051 |
6.65 |
| 2026-03-30 00:00 |
09:10:01.06 |
-28:07:37.3 |
HIP 45051 |
7.85 |
| 2026-03-30 12:00 |
09:09:56.75 |
-28:06:51.0 |
HIP 45051 |
9.04 |
| 2026-03-31 00:00 |
09:09:52.49 |
-28:06:04.4 |
HIP 45051 |
10.24 |
| 2026-03-31 12:00 |
09:09:48.27 |
-28:05:17.7 |
HIP 45051 |
11.43 |
| 2026-04-01 00:00 |
09:09:44.11 |
-28:04:30.9 |
HIP 45051 |
12.62 |
| 2026-04-01 12:00 |
09:09:39.99 |
-28:03:43.9 |
HIP 45051 |
13.81 |
| 2026-04-02 00:00 |
09:09:35.92 |
-28:02:56.8 |
HIP 45051 |
14.98 |
| 2026-04-02 12:00 |
09:09:31.90 |
-28:02:09.6 |
HIP 45051 |
16.16 |
| 2026-04-03 00:00 |
09:09:27.93 |
-28:01:22.2 |
HIP 45051 |
17.32 |
| 2026-04-03 12:00 |
09:09:24.01 |
-28:00:34.7 |
HIP 45051 |
18.49 |
| 2026-04-04 00:00 |
09:09:20.14 |
-27:59:47.1 |
HIP 45051 |
19.64 |
| 2026-04-04 12:00 |
09:09:16.32 |
-27:58:59.3 |
HIP 45051 |
20.79 |
| 2026-04-05 00:00 |
09:09:12.55 |
-27:58:11.5 |
HIP 44826 |
19.77 |
| 2026-04-05 12:00 |
09:09:08.83 |
-27:57:23.6 |
HIP 44826 |
18.62 |
| 2026-04-06 00:00 |
09:09:05.17 |
-27:56:35.5 |
HIP 44826 |
17.49 |
| 2026-04-06 12:00 |
09:09:01.55 |
-27:55:47.4 |
HIP 44826 |
16.36 |
| 2026-04-07 00:00 |
09:08:57.98 |
-27:54:59.1 |
HIP 44826 |
15.24 |
| 2026-04-07 12:00 |
09:08:54.47 |
-27:54:10.8 |
HIP 44826 |
14.13 |
| 2026-04-08 00:00 |
09:08:51.01 |
-27:53:22.4 |
HIP 44826 |
13.02 |
| 2026-04-08 12:00 |
09:08:47.60 |
-27:52:34.0 |
HIP 44826 |
11.93 |
| 2026-04-09 00:00 |
09:08:44.24 |
-27:51:45.4 |
HIP 44826 |
10.85 |
| 2026-04-09 12:00 |
09:08:40.93 |
-27:50:56.8 |
HIP 44826 |
9.78 |
| 2026-04-10 00:00 |
09:08:37.67 |
-27:50:08.2 |
HIP 44826 |
8.72 |
| 2026-04-10 12:00 |
09:08:34.47 |
-27:49:19.5 |
HIP 44826 |
7.68 |
| 2026-04-11 00:00 |
09:08:31.32 |
-27:48:30.7 |
HIP 44826 |
6.67 |
| 2026-04-11 12:00 |
09:08:28.22 |
-27:47:41.9 |
HIP 44826 |
5.68 |
| 2026-04-12 00:00 |
09:08:25.17 |
-27:46:53.1 |
HIP 44826 |
4.74 |
| 2026-04-12 12:00 |
09:08:22.18 |
-27:46:04.2 |
HIP 44826 |
3.87 |
| 2026-04-13 00:00 |
09:08:19.24 |
-27:45:15.3 |
HIP 44826 |
3.12 |
| 2026-04-13 12:00 |
09:08:16.35 |
-27:44:26.4 |
HIP 44826 |
2.60 |
| 2026-04-14 00:00 |
09:08:13.52 |
-27:43:37.5 |
HIP 44826 |
2.44 |
| 2026-04-14 12:00 |
09:08:10.74 |
-27:42:48.5 |
HIP 44826 |
2.70 |
| 2026-04-15 00:00 |
09:08:08.01 |
-27:41:59.6 |
HIP 44826 |
3.27 |
| 2026-04-15 12:00 |
09:08:05.34 |
-27:41:10.6 |
HIP 44826 |
4.03 |
| 2026-04-16 00:00 |
09:08:02.72 |
-27:40:21.7 |
HIP 44826 |
4.87 |