C/2014 R3 (PANSTARRS)
| 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) |
| 2026-02-03 00:00 |
09:21:27.02 |
-28:57:40.9 |
HIP 45842 |
12.90 |
| 2026-02-03 12:00 |
09:21:19.87 |
-28:57:40.4 |
HIP 45842 |
11.89 |
| 2026-02-04 00:00 |
09:21:12.72 |
-28:57:39.3 |
HIP 45842 |
11.00 |
| 2026-02-04 12:00 |
09:21:05.57 |
-28:57:37.6 |
HIP 45842 |
10.27 |
| 2026-02-05 00:00 |
09:20:58.41 |
-28:57:35.3 |
HIP 45842 |
9.73 |
| 2026-02-05 12:00 |
09:20:51.26 |
-28:57:32.5 |
HIP 45842 |
9.40 |
| 2026-02-06 00:00 |
09:20:44.10 |
-28:57:29.0 |
HIP 45842 |
9.33 |
| 2026-02-06 12:00 |
09:20:36.94 |
-28:57:25.0 |
HIP 45842 |
9.51 |
| 2026-02-07 00:00 |
09:20:29.77 |
-28:57:20.3 |
HIP 45842 |
9.92 |
| 2026-02-07 12:00 |
09:20:22.61 |
-28:57:15.1 |
HIP 45805 |
10.38 |
| 2026-02-08 00:00 |
09:20:15.45 |
-28:57:09.4 |
HIP 45805 |
10.72 |
| 2026-02-08 12:00 |
09:20:08.30 |
-28:57:03.0 |
HIP 45805 |
11.27 |
| 2026-02-09 00:00 |
09:20:01.14 |
-28:56:56.1 |
HIP 45805 |
12.01 |
| 2026-02-09 12:00 |
09:19:53.99 |
-28:56:48.5 |
HIP 45805 |
12.90 |
| 2026-02-10 00:00 |
09:19:46.84 |
-28:56:40.5 |
HIP 45805 |
13.93 |
| 2026-02-10 12:00 |
09:19:39.69 |
-28:56:31.8 |
HIP 45805 |
15.05 |
| 2026-02-11 00:00 |
09:19:32.55 |
-28:56:22.6 |
HIP 45805 |
16.25 |
| 2026-02-11 12:00 |
09:19:25.42 |
-28:56:12.8 |
HIP 45805 |
17.52 |
| 2026-02-12 00:00 |
09:19:18.28 |
-28:56:02.4 |
HIP 45805 |
18.84 |
| 2026-02-12 12:00 |
09:19:11.16 |
-28:55:51.5 |
HIP 45805 |
20.20 |
| 2026-02-13 00:00 |
09:19:04.04 |
-28:55:40.0 |
HIP 45805 |
21.59 |
| 2026-02-13 12:00 |
09:18:56.93 |
-28:55:28.0 |
HIP 45805 |
23.00 |
| 2026-02-14 00:00 |
09:18:49.83 |
-28:55:15.4 |
HIP 45805 |
24.44 |
| 2026-02-14 12:00 |
09:18:42.74 |
-28:55:02.2 |
HIP 45805 |
25.90 |
| 2026-02-15 00:00 |
09:18:35.66 |
-28:54:48.5 |
HIP 45805 |
27.37 |
| 2026-02-15 12:00 |
09:18:28.59 |
-28:54:34.2 |
HIP 45805 |
28.85 |
| 2026-02-16 00:00 |
09:18:21.52 |
-28:54:19.4 |
HIP 45487 |
29.33 |
| 2026-02-16 12:00 |
09:18:14.47 |
-28:54:04.1 |
HIP 45487 |
27.78 |
| 2026-02-17 00:00 |
09:18:07.43 |
-28:53:48.2 |
HIP 45487 |
26.23 |
| 2026-02-17 12:00 |
09:18:00.41 |
-28:53:31.8 |
HIP 45487 |
24.69 |
| 2026-02-18 00:00 |
09:17:53.39 |
-28:53:14.8 |
HIP 45487 |
23.15 |
| 2026-02-18 12:00 |
09:17:46.40 |
-28:52:57.3 |
HIP 45487 |
21.62 |
| 2026-02-19 00:00 |
09:17:39.41 |
-28:52:39.3 |
HIP 45487 |
20.10 |
| 2026-02-19 12:00 |
09:17:32.44 |
-28:52:20.7 |
HIP 45487 |
18.58 |
| 2026-02-20 00:00 |
09:17:25.49 |
-28:52:01.7 |
HIP 45487 |
17.08 |
| 2026-02-20 12:00 |
09:17:18.55 |
-28:51:42.1 |
HIP 45487 |
15.60 |
| 2026-02-21 00:00 |
09:17:11.63 |
-28:51:22.0 |
HIP 45487 |
14.13 |
| 2026-02-21 12:00 |
09:17:04.72 |
-28:51:01.4 |
HIP 45487 |
12.68 |
| 2026-02-22 00:00 |
09:16:57.84 |
-28:50:40.2 |
HIP 45487 |
11.28 |
| 2026-02-22 12:00 |
09:16:50.97 |
-28:50:18.6 |
HIP 45487 |
9.91 |
| 2026-02-23 00:00 |
09:16:44.12 |
-28:49:56.5 |
HIP 45487 |
8.62 |
| 2026-02-23 12:00 |
09:16:37.30 |
-28:49:33.9 |
HIP 45487 |
7.43 |
| 2026-02-24 00:00 |
09:16:30.49 |
-28:49:10.8 |
HIP 45487 |
6.41 |