| Parameter |
Value |
| Designation |
P/2014 U4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-08-03T22:12:56.600640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:01Z |
| Obs used |
61 |
| NEO |
- |
| M1 |
19.100 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-10-27.0000000 |
| e |
0.47100403 |
| q (au) |
1.843417 |
| a (au) |
3.484747 |
| i (deg) |
6.456987 |
| Ω (om, deg) |
12.045421 |
| ω (w, deg) |
347.730100 |
| M (ma, deg) |
12.738279 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.883 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.883 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.634 |
| k |
0.800 |
| δ90 |
10.000 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
15:07:13.38 |
-23:52:14.2 |
HIP 73992 |
19.41 |
| 2026-06-01 12:00 |
15:06:50.08 |
-23:50:51.7 |
HIP 73896 |
19.25 |
| 2026-06-02 00:00 |
15:06:26.94 |
-23:49:29.0 |
HIP 73830 |
15.56 |
| 2026-06-02 12:00 |
15:06:03.96 |
-23:48:06.1 |
HIP 73830 |
10.15 |
| 2026-06-03 00:00 |
15:05:41.13 |
-23:46:43.0 |
HIP 73830 |
4.82 |
| 2026-06-03 12:00 |
15:05:18.47 |
-23:45:19.8 |
HIP 73830 |
1.31 |
| 2026-06-04 00:00 |
15:04:55.98 |
-23:43:56.4 |
HIP 73830 |
6.12 |
| 2026-06-04 12:00 |
15:04:33.66 |
-23:42:33.0 |
HIP 73830 |
11.37 |
| 2026-06-05 00:00 |
15:04:11.51 |
-23:41:09.5 |
HIP 73830 |
16.61 |
| 2026-06-05 12:00 |
15:03:49.54 |
-23:39:45.9 |
HIP 73830 |
21.82 |
| 2026-06-06 00:00 |
15:03:27.76 |
-23:38:22.3 |
HIP 73830 |
26.99 |
| 2026-06-06 12:00 |
15:03:06.17 |
-23:36:58.7 |
HIP 73830 |
32.13 |
| 2026-06-07 00:00 |
15:02:44.77 |
-23:35:35.1 |
HIP 73830 |
37.22 |
| 2026-06-07 12:00 |
15:02:23.56 |
-23:34:11.6 |
HIP 73432 |
36.33 |
| 2026-06-08 00:00 |
15:02:02.56 |
-23:32:48.1 |
HIP 73432 |
33.83 |
| 2026-06-08 12:00 |
15:01:41.75 |
-23:31:24.7 |
HIP 73432 |
31.95 |
| 2026-06-09 00:00 |
15:01:21.16 |
-23:30:01.4 |
HIP 73432 |
30.79 |
| 2026-06-09 12:00 |
15:01:00.77 |
-23:28:38.3 |
HIP 73432 |
30.39 |
| 2026-06-10 00:00 |
15:00:40.60 |
-23:27:15.3 |
HIP 73432 |
30.77 |
| 2026-06-10 12:00 |
15:00:20.65 |
-23:25:52.5 |
HIP 73432 |
31.88 |
| 2026-06-11 00:00 |
15:00:00.92 |
-23:24:30.0 |
HIP 73222 |
30.22 |
| 2026-06-11 12:00 |
14:59:41.42 |
-23:23:07.6 |
HIP 73222 |
26.24 |
| 2026-06-12 00:00 |
14:59:22.14 |
-23:21:45.5 |
HIP 73222 |
22.56 |
| 2026-06-12 12:00 |
14:59:03.10 |
-23:20:23.7 |
HIP 73222 |
19.34 |
| 2026-06-13 00:00 |
14:58:44.29 |
-23:19:02.2 |
HIP 73222 |
16.80 |
| 2026-06-13 12:00 |
14:58:25.72 |
-23:17:41.1 |
HIP 73222 |
15.23 |
| 2026-06-14 00:00 |
14:58:07.40 |
-23:16:20.3 |
HIP 73222 |
14.89 |
| 2026-06-14 12:00 |
14:57:49.32 |
-23:14:59.8 |
HIP 73222 |
15.82 |
| 2026-06-15 00:00 |
14:57:31.49 |
-23:13:39.8 |
HIP 73222 |
17.78 |
| 2026-06-15 12:00 |
14:57:13.91 |
-23:12:20.2 |
HIP 73104 |
18.57 |
| 2026-06-16 00:00 |
14:56:56.58 |
-23:11:01.0 |
HIP 73104 |
15.45 |
| 2026-06-16 12:00 |
14:56:39.51 |
-23:09:42.3 |
HIP 73104 |
12.97 |
| 2026-06-17 00:00 |
14:56:22.71 |
-23:08:24.1 |
HIP 73104 |
11.49 |
| 2026-06-17 12:00 |
14:56:06.17 |
-23:07:06.4 |
HIP 73104 |
11.34 |
| 2026-06-18 00:00 |
14:55:49.89 |
-23:05:49.3 |
HIP 73104 |
12.52 |
| 2026-06-18 12:00 |
14:55:33.88 |
-23:04:32.7 |
HIP 73104 |
14.65 |
| 2026-06-19 00:00 |
14:55:18.14 |
-23:03:16.6 |
HIP 73104 |
17.36 |
| 2026-06-19 12:00 |
14:55:02.68 |
-23:02:01.2 |
HIP 73104 |
20.37 |
| 2026-06-20 00:00 |
14:54:47.48 |
-23:00:46.4 |
HIP 73104 |
23.54 |
| 2026-06-20 12:00 |
14:54:32.57 |
-22:59:32.2 |
HIP 73104 |
26.79 |
| 2026-06-21 00:00 |
14:54:17.93 |
-22:58:18.7 |
HIP 73104 |
30.07 |
| 2026-06-21 12:00 |
14:54:03.58 |
-22:57:05.8 |
HIP 72839 |
32.73 |
| 2026-06-22 00:00 |
14:53:49.50 |
-22:55:53.7 |
HIP 72839 |
33.02 |