C/2014 OE4 (PANSTARRS)
| Parameter |
Value |
| Designation |
C/2014 OE4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-12-10T21:06:20.229120Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:42:38Z |
| Obs used |
1798 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
7.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2017-05-12.0000000 |
| e |
0.99972574 |
| q (au) |
6.244383 |
| a (au) |
22768.366062 |
| i (deg) |
81.347248 |
| Ω (om, deg) |
240.394924 |
| ω (w, deg) |
65.755220 |
| M (ma, deg) |
0.000044 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.003 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.003 |
| n |
2.000 |
| gf |
0.897 |
| gb |
-0.935 |
| k |
1.000 |
| δ90 |
4.682 |
| 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) |
| 2026-02-03 00:00 |
03:38:54.96 |
+21:22:42.8 |
HIP 16908 |
18.76 |
| 2026-02-03 12:00 |
03:38:53.99 |
+21:22:20.9 |
HIP 16908 |
18.50 |
| 2026-02-04 00:00 |
03:38:53.08 |
+21:21:59.2 |
HIP 16908 |
18.26 |
| 2026-02-04 12:00 |
03:38:52.22 |
+21:21:37.6 |
HIP 16908 |
18.04 |
| 2026-02-05 00:00 |
03:38:51.42 |
+21:21:16.3 |
HIP 16908 |
17.83 |
| 2026-02-05 12:00 |
03:38:50.67 |
+21:20:55.1 |
HIP 16908 |
17.65 |
| 2026-02-06 00:00 |
03:38:49.97 |
+21:20:34.2 |
HIP 16908 |
17.48 |
| 2026-02-06 12:00 |
03:38:49.33 |
+21:20:13.4 |
HIP 16908 |
17.34 |
| 2026-02-07 00:00 |
03:38:48.75 |
+21:19:52.9 |
HIP 16908 |
17.21 |
| 2026-02-07 12:00 |
03:38:48.22 |
+21:19:32.5 |
HIP 16908 |
17.11 |
| 2026-02-08 00:00 |
03:38:47.74 |
+21:19:12.3 |
HIP 16908 |
17.02 |
| 2026-02-08 12:00 |
03:38:47.32 |
+21:18:52.3 |
HIP 16908 |
16.96 |
| 2026-02-09 00:00 |
03:38:46.95 |
+21:18:32.6 |
HIP 16908 |
16.91 |
| 2026-02-09 12:00 |
03:38:46.63 |
+21:18:13.0 |
HIP 16908 |
16.88 |
| 2026-02-10 00:00 |
03:38:46.37 |
+21:17:53.6 |
HIP 16908 |
16.87 |
| 2026-02-10 12:00 |
03:38:46.17 |
+21:17:34.4 |
HIP 16908 |
16.87 |
| 2026-02-11 00:00 |
03:38:46.02 |
+21:17:15.4 |
HIP 16908 |
16.90 |
| 2026-02-11 12:00 |
03:38:45.92 |
+21:16:56.6 |
HIP 16908 |
16.94 |
| 2026-02-12 00:00 |
03:38:45.88 |
+21:16:38.0 |
HIP 16908 |
17.00 |
| 2026-02-12 12:00 |
03:38:45.89 |
+21:16:19.6 |
HIP 16908 |
17.08 |
| 2026-02-13 00:00 |
03:38:45.95 |
+21:16:01.4 |
HIP 16908 |
17.17 |
| 2026-02-13 12:00 |
03:38:46.07 |
+21:15:43.4 |
HIP 16908 |
17.28 |
| 2026-02-14 00:00 |
03:38:46.25 |
+21:15:25.6 |
HIP 16908 |
17.41 |
| 2026-02-14 12:00 |
03:38:46.47 |
+21:15:08.0 |
HIP 16908 |
17.55 |
| 2026-02-15 00:00 |
03:38:46.76 |
+21:14:50.6 |
HIP 16908 |
17.70 |
| 2026-02-15 12:00 |
03:38:47.09 |
+21:14:33.3 |
HIP 16908 |
17.87 |
| 2026-02-16 00:00 |
03:38:47.48 |
+21:14:16.3 |
HIP 16908 |
18.05 |
| 2026-02-16 12:00 |
03:38:47.92 |
+21:13:59.5 |
HIP 16908 |
18.25 |
| 2026-02-17 00:00 |
03:38:48.42 |
+21:13:42.9 |
HIP 16908 |
18.46 |
| 2026-02-17 12:00 |
03:38:48.97 |
+21:13:26.4 |
HIP 17026 |
18.67 |
| 2026-02-18 00:00 |
03:38:49.57 |
+21:13:10.2 |
HIP 17026 |
18.38 |
| 2026-02-18 12:00 |
03:38:50.22 |
+21:12:54.2 |
HIP 17026 |
18.10 |
| 2026-02-19 00:00 |
03:38:50.93 |
+21:12:38.3 |
HIP 17026 |
17.82 |
| 2026-02-19 12:00 |
03:38:51.70 |
+21:12:22.7 |
HIP 17026 |
17.54 |
| 2026-02-20 00:00 |
03:38:52.51 |
+21:12:07.2 |
HIP 17026 |
17.26 |
| 2026-02-20 12:00 |
03:38:53.38 |
+21:11:52.0 |
HIP 17026 |
16.99 |
| 2026-02-21 00:00 |
03:38:54.30 |
+21:11:36.9 |
HIP 17026 |
16.72 |
| 2026-02-21 12:00 |
03:38:55.27 |
+21:11:22.0 |
HIP 17026 |
16.45 |
| 2026-02-22 00:00 |
03:38:56.29 |
+21:11:07.3 |
HIP 17026 |
16.20 |
| 2026-02-22 12:00 |
03:38:57.37 |
+21:10:52.9 |
HIP 17026 |
15.94 |
| 2026-02-23 00:00 |
03:38:58.50 |
+21:10:38.6 |
HIP 17026 |
15.70 |
| 2026-02-23 12:00 |
03:38:59.68 |
+21:10:24.5 |
HIP 17026 |
15.46 |
| 2026-02-24 00:00 |
03:39:00.91 |
+21:10:10.6 |
HIP 17026 |
15.23 |