| 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
$$
M_a = (4.083 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.083 |
| n |
6.000 |
| gf |
0.858 |
| gb |
-0.825 |
| k |
0.809 |
| δ90 |
9.997 |
| 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 |
+27.2337 |
-23.512 |
| 2016-08-10 |
2020-02-27 |
+1.4894 |
-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) |
| 2026-06-01 00:00 |
09:07:47.08 |
-26:35:57.8 |
HIP 44887 |
16.16 |
| 2026-06-01 12:00 |
09:07:49.19 |
-26:35:28.4 |
HIP 44887 |
16.11 |
| 2026-06-02 00:00 |
09:07:51.35 |
-26:34:59.4 |
HIP 44887 |
16.08 |
| 2026-06-02 12:00 |
09:07:53.54 |
-26:34:30.7 |
HIP 44887 |
16.07 |
| 2026-06-03 00:00 |
09:07:55.78 |
-26:34:02.4 |
HIP 44887 |
16.07 |
| 2026-06-03 12:00 |
09:07:58.06 |
-26:33:34.4 |
HIP 44887 |
16.10 |
| 2026-06-04 00:00 |
09:08:00.38 |
-26:33:06.8 |
HIP 44887 |
16.14 |
| 2026-06-04 12:00 |
09:08:02.75 |
-26:32:39.6 |
HIP 44887 |
16.21 |
| 2026-06-05 00:00 |
09:08:05.15 |
-26:32:12.8 |
HIP 44887 |
16.29 |
| 2026-06-05 12:00 |
09:08:07.60 |
-26:31:46.4 |
HIP 44887 |
16.39 |
| 2026-06-06 00:00 |
09:08:10.09 |
-26:31:20.4 |
HIP 44887 |
16.51 |
| 2026-06-06 12:00 |
09:08:12.62 |
-26:30:54.7 |
HIP 44887 |
16.65 |
| 2026-06-07 00:00 |
09:08:15.19 |
-26:30:29.4 |
HIP 44887 |
16.81 |
| 2026-06-07 12:00 |
09:08:17.80 |
-26:30:04.5 |
HIP 44887 |
16.99 |
| 2026-06-08 00:00 |
09:08:20.45 |
-26:29:40.1 |
HIP 44887 |
17.18 |
| 2026-06-08 12:00 |
09:08:23.14 |
-26:29:16.0 |
HIP 44887 |
17.40 |
| 2026-06-09 00:00 |
09:08:25.87 |
-26:28:52.3 |
HIP 44887 |
17.64 |
| 2026-06-09 12:00 |
09:08:28.64 |
-26:28:29.0 |
HIP 44887 |
17.89 |
| 2026-06-10 00:00 |
09:08:31.45 |
-26:28:06.1 |
HIP 44887 |
18.16 |
| 2026-06-10 12:00 |
09:08:34.30 |
-26:27:43.6 |
HIP 44887 |
18.45 |
| 2026-06-11 00:00 |
09:08:37.18 |
-26:27:21.5 |
HIP 44887 |
18.75 |
| 2026-06-11 12:00 |
09:08:40.11 |
-26:26:59.8 |
HIP 44887 |
19.08 |
| 2026-06-12 00:00 |
09:08:43.07 |
-26:26:38.6 |
HIP 44887 |
19.41 |
| 2026-06-12 12:00 |
09:08:46.08 |
-26:26:17.7 |
HIP 44887 |
19.77 |
| 2026-06-13 00:00 |
09:08:49.11 |
-26:25:57.3 |
HIP 44887 |
20.14 |
| 2026-06-13 12:00 |
09:08:52.19 |
-26:25:37.3 |
HIP 44887 |
20.53 |
| 2026-06-14 00:00 |
09:08:55.30 |
-26:25:17.7 |
HIP 44887 |
20.93 |
| 2026-06-14 12:00 |
09:08:58.46 |
-26:24:58.5 |
HIP 44887 |
21.34 |
| 2026-06-15 00:00 |
09:09:01.64 |
-26:24:39.8 |
HIP 45044 |
20.85 |
| 2026-06-15 12:00 |
09:09:04.87 |
-26:24:21.4 |
HIP 45044 |
20.07 |
| 2026-06-16 00:00 |
09:09:08.12 |
-26:24:03.5 |
HIP 45044 |
19.28 |
| 2026-06-16 12:00 |
09:09:11.42 |
-26:23:46.1 |
HIP 45044 |
18.49 |
| 2026-06-17 00:00 |
09:09:14.75 |
-26:23:29.0 |
HIP 45044 |
17.69 |
| 2026-06-17 12:00 |
09:09:18.11 |
-26:23:12.4 |
HIP 45044 |
16.89 |
| 2026-06-18 00:00 |
09:09:21.51 |
-26:22:56.2 |
HIP 45044 |
16.08 |
| 2026-06-18 12:00 |
09:09:24.95 |
-26:22:40.5 |
HIP 45044 |
15.27 |
| 2026-06-19 00:00 |
09:09:28.41 |
-26:22:25.2 |
HIP 45044 |
14.45 |
| 2026-06-19 12:00 |
09:09:31.91 |
-26:22:10.3 |
HIP 45044 |
13.63 |
| 2026-06-20 00:00 |
09:09:35.45 |
-26:21:55.9 |
HIP 45044 |
12.80 |
| 2026-06-20 12:00 |
09:09:39.02 |
-26:21:41.9 |
HIP 45044 |
11.98 |
| 2026-06-21 00:00 |
09:09:42.62 |
-26:21:28.3 |
HIP 45044 |
11.14 |
| 2026-06-21 12:00 |
09:09:46.25 |
-26:21:15.2 |
HIP 45044 |
10.31 |
| 2026-06-22 00:00 |
09:09:49.91 |
-26:21:02.5 |
HIP 45044 |
9.47 |