| 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
$$
M_a = (8.015 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.015 |
| n |
2.000 |
| gf |
0.897 |
| gb |
-0.935 |
| k |
1.000 |
| δ90 |
4.434 |
| 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) |
| 2026-06-01 00:00 |
03:53:49.11 |
+21:05:50.6 |
HIP 18244 |
4.85 |
| 2026-06-01 12:00 |
03:53:55.00 |
+21:05:54.2 |
HIP 18244 |
3.65 |
| 2026-06-02 00:00 |
03:54:00.89 |
+21:05:57.8 |
HIP 18244 |
2.64 |
| 2026-06-02 12:00 |
03:54:06.77 |
+21:06:01.4 |
HIP 18244 |
2.09 |
| 2026-06-03 00:00 |
03:54:12.64 |
+21:06:04.9 |
HIP 18244 |
2.35 |
| 2026-06-03 12:00 |
03:54:18.49 |
+21:06:08.5 |
HIP 18244 |
3.23 |
| 2026-06-04 00:00 |
03:54:24.34 |
+21:06:12.0 |
HIP 18244 |
4.36 |
| 2026-06-04 12:00 |
03:54:30.18 |
+21:06:15.4 |
HIP 18244 |
5.60 |
| 2026-06-05 00:00 |
03:54:36.01 |
+21:06:18.8 |
HIP 18244 |
6.88 |
| 2026-06-05 12:00 |
03:54:41.83 |
+21:06:22.2 |
HIP 18244 |
8.19 |
| 2026-06-06 00:00 |
03:54:47.64 |
+21:06:25.6 |
HIP 18244 |
9.51 |
| 2026-06-06 12:00 |
03:54:53.43 |
+21:06:28.9 |
HIP 18244 |
10.83 |
| 2026-06-07 00:00 |
03:54:59.21 |
+21:06:32.2 |
HIP 18244 |
12.16 |
| 2026-06-07 12:00 |
03:55:04.99 |
+21:06:35.4 |
HIP 18244 |
13.49 |
| 2026-06-08 00:00 |
03:55:10.75 |
+21:06:38.6 |
HIP 18244 |
14.82 |
| 2026-06-08 12:00 |
03:55:16.49 |
+21:06:41.8 |
HIP 18244 |
16.15 |
| 2026-06-09 00:00 |
03:55:22.22 |
+21:06:44.9 |
HIP 18244 |
17.48 |
| 2026-06-09 12:00 |
03:55:27.94 |
+21:06:48.0 |
HIP 18244 |
18.80 |
| 2026-06-10 00:00 |
03:55:33.65 |
+21:06:51.0 |
HIP 18244 |
20.13 |
| 2026-06-10 12:00 |
03:55:39.34 |
+21:06:54.0 |
HIP 18244 |
21.45 |
| 2026-06-11 00:00 |
03:55:45.02 |
+21:06:56.9 |
HIP 18405 |
21.25 |
| 2026-06-11 12:00 |
03:55:50.68 |
+21:06:59.8 |
HIP 18405 |
21.02 |
| 2026-06-12 00:00 |
03:55:56.33 |
+21:07:02.6 |
HIP 18405 |
20.88 |
| 2026-06-12 12:00 |
03:56:01.96 |
+21:07:05.4 |
HIP 18490 |
20.32 |
| 2026-06-13 00:00 |
03:56:07.58 |
+21:07:08.2 |
HIP 18490 |
19.27 |
| 2026-06-13 12:00 |
03:56:13.18 |
+21:07:10.8 |
HIP 18490 |
18.25 |
| 2026-06-14 00:00 |
03:56:18.76 |
+21:07:13.5 |
HIP 18490 |
17.28 |
| 2026-06-14 12:00 |
03:56:24.33 |
+21:07:16.1 |
HIP 18490 |
16.35 |
| 2026-06-15 00:00 |
03:56:29.88 |
+21:07:18.6 |
HIP 18490 |
15.48 |
| 2026-06-15 12:00 |
03:56:35.41 |
+21:07:21.0 |
HIP 18490 |
14.68 |
| 2026-06-16 00:00 |
03:56:40.92 |
+21:07:23.5 |
HIP 18490 |
13.95 |
| 2026-06-16 12:00 |
03:56:46.41 |
+21:07:25.8 |
HIP 18490 |
13.31 |
| 2026-06-17 00:00 |
03:56:51.89 |
+21:07:28.1 |
HIP 18490 |
12.77 |
| 2026-06-17 12:00 |
03:56:57.35 |
+21:07:30.3 |
HIP 18490 |
12.34 |
| 2026-06-18 00:00 |
03:57:02.79 |
+21:07:32.5 |
HIP 18490 |
12.04 |
| 2026-06-18 12:00 |
03:57:08.20 |
+21:07:34.6 |
HIP 18490 |
11.86 |
| 2026-06-19 00:00 |
03:57:13.60 |
+21:07:36.6 |
HIP 18490 |
11.82 |
| 2026-06-19 12:00 |
03:57:18.98 |
+21:07:38.6 |
HIP 18490 |
11.91 |
| 2026-06-20 00:00 |
03:57:24.33 |
+21:07:40.5 |
HIP 18490 |
12.13 |
| 2026-06-20 12:00 |
03:57:29.67 |
+21:07:42.4 |
HIP 18490 |
12.47 |
| 2026-06-21 00:00 |
03:57:34.98 |
+21:07:44.2 |
HIP 18490 |
12.92 |
| 2026-06-21 12:00 |
03:57:40.28 |
+21:07:45.9 |
HIP 18490 |
13.47 |
| 2026-06-22 00:00 |
03:57:45.55 |
+21:07:47.5 |
HIP 18490 |
14.10 |