| 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) |
| 2026-09-20 00:00 |
09:24:04.48 |
-27:43:11.9 |
HIP 46140 |
18.17 |
| 2026-09-20 12:00 |
09:24:08.43 |
-27:44:13.9 |
HIP 46140 |
16.91 |
| 2026-09-21 00:00 |
09:24:12.36 |
-27:45:16.2 |
HIP 46140 |
15.65 |
| 2026-09-21 12:00 |
09:24:16.26 |
-27:46:18.8 |
HIP 46140 |
14.41 |
| 2026-09-22 00:00 |
09:24:20.12 |
-27:47:21.6 |
HIP 46140 |
13.19 |
| 2026-09-22 12:00 |
09:24:23.96 |
-27:48:24.6 |
HIP 46140 |
12.00 |
| 2026-09-23 00:00 |
09:24:27.77 |
-27:49:27.9 |
HIP 46140 |
10.83 |
| 2026-09-23 12:00 |
09:24:31.54 |
-27:50:31.5 |
HIP 46140 |
9.72 |
| 2026-09-24 00:00 |
09:24:35.29 |
-27:51:35.3 |
HIP 46140 |
8.66 |
| 2026-09-24 12:00 |
09:24:39.00 |
-27:52:39.3 |
HIP 46140 |
7.69 |
| 2026-09-25 00:00 |
09:24:42.68 |
-27:53:43.6 |
HIP 46140 |
6.84 |
| 2026-09-25 12:00 |
09:24:46.33 |
-27:54:48.1 |
HIP 46140 |
6.17 |
| 2026-09-26 00:00 |
09:24:49.95 |
-27:55:52.9 |
HIP 46140 |
5.73 |
| 2026-09-26 12:00 |
09:24:53.53 |
-27:56:57.9 |
HIP 46140 |
5.57 |
| 2026-09-27 00:00 |
09:24:57.08 |
-27:58:03.1 |
HIP 46140 |
5.73 |
| 2026-09-27 12:00 |
09:25:00.60 |
-27:59:08.5 |
HIP 46140 |
6.17 |
| 2026-09-28 00:00 |
09:25:04.09 |
-28:00:14.2 |
HIP 46140 |
6.84 |
| 2026-09-28 12:00 |
09:25:07.54 |
-28:01:20.1 |
HIP 46140 |
7.68 |
| 2026-09-29 00:00 |
09:25:10.96 |
-28:02:26.1 |
HIP 46140 |
8.64 |
| 2026-09-29 12:00 |
09:25:14.34 |
-28:03:32.5 |
HIP 46140 |
9.68 |
| 2026-09-30 00:00 |
09:25:17.69 |
-28:04:39.0 |
HIP 46140 |
10.78 |
| 2026-09-30 12:00 |
09:25:21.01 |
-28:05:45.7 |
HIP 46140 |
11.93 |
| 2026-10-01 00:00 |
09:25:24.29 |
-28:06:52.6 |
HIP 46140 |
13.10 |
| 2026-10-01 12:00 |
09:25:27.53 |
-28:07:59.8 |
HIP 46140 |
14.30 |
| 2026-10-02 00:00 |
09:25:30.74 |
-28:09:07.1 |
HIP 46140 |
15.51 |
| 2026-10-02 12:00 |
09:25:33.91 |
-28:10:14.6 |
HIP 46140 |
16.73 |
| 2026-10-03 00:00 |
09:25:37.05 |
-28:11:22.3 |
HIP 46140 |
17.97 |
| 2026-10-03 12:00 |
09:25:40.15 |
-28:12:30.2 |
HIP 46140 |
19.21 |
| 2026-10-04 00:00 |
09:25:43.21 |
-28:13:38.3 |
HIP 46140 |
20.46 |
| 2026-10-04 12:00 |
09:25:46.24 |
-28:14:46.6 |
HIP 46140 |
21.71 |
| 2026-10-05 00:00 |
09:25:49.23 |
-28:15:55.1 |
HIP 46242 |
22.38 |
| 2026-10-05 12:00 |
09:25:52.18 |
-28:17:03.7 |
HIP 46242 |
21.32 |
| 2026-10-06 00:00 |
09:25:55.09 |
-28:18:12.5 |
HIP 46242 |
20.29 |
| 2026-10-06 12:00 |
09:25:57.97 |
-28:19:21.5 |
HIP 46242 |
19.28 |
| 2026-10-07 00:00 |
09:26:00.80 |
-28:20:30.7 |
HIP 46242 |
18.32 |
| 2026-10-07 12:00 |
09:26:03.60 |
-28:21:40.0 |
HIP 46242 |
17.39 |
| 2026-10-08 00:00 |
09:26:06.36 |
-28:22:49.4 |
HIP 46242 |
16.50 |
| 2026-10-08 12:00 |
09:26:09.08 |
-28:23:59.1 |
HIP 46242 |
15.67 |
| 2026-10-09 00:00 |
09:26:11.75 |
-28:25:08.8 |
HIP 46242 |
14.91 |
| 2026-10-09 12:00 |
09:26:14.39 |
-28:26:18.7 |
HIP 46242 |
14.21 |
| 2026-10-10 00:00 |
09:26:16.99 |
-28:27:28.8 |
HIP 46242 |
13.59 |
| 2026-10-10 12:00 |
09:26:19.54 |
-28:28:39.0 |
HIP 46242 |
13.07 |
| 2026-10-11 00:00 |
09:26:22.06 |
-28:29:49.4 |
HIP 46242 |
12.65 |