| Parameter |
Value |
| Designation |
C/2013 V5 (Oukaimeden) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-09-28T05:21:10.025280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:42Z |
| Obs used |
1519 |
| NEO |
- |
| M1 |
10.800 |
| K1 |
7.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-05-07.0000000 |
| e |
0.99872022 |
| q (au) |
0.625586 |
| a (au) |
488.821430 |
| i (deg) |
154.885490 |
| Ω (om, deg) |
278.616285 |
| ω (w, deg) |
314.568126 |
| M (ma, deg) |
359.986847 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.416 + 3.189\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.416 |
| n |
3.189 |
| gf |
1.000 |
| gb |
-0.569 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2013-11-12 |
2014-08-23 |
+2.6983 |
-1.565 |
| 2014-08-23 |
2014-09-28 |
-5.6126 |
-1.006 |
| 2014-09-28 |
2014-10-14 |
+11.8900 |
+2.906 |
| 2014-10-14 |
2015-02-17 |
+5.1684 |
+0.565 |
| 2015-02-17 |
2015-04-19 |
+0.6936 |
+3.285 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
11:09:14.30 |
+29:40:56.5 |
HIP 54488 |
12.52 |
| 2026-05-12 12:00 |
11:09:12.20 |
+29:40:43.0 |
HIP 54488 |
12.13 |
| 2026-05-13 00:00 |
11:09:10.13 |
+29:40:29.3 |
HIP 54488 |
11.75 |
| 2026-05-13 12:00 |
11:09:08.10 |
+29:40:15.4 |
HIP 54488 |
11.38 |
| 2026-05-14 00:00 |
11:09:06.10 |
+29:40:01.1 |
HIP 54488 |
11.02 |
| 2026-05-14 12:00 |
11:09:04.15 |
+29:39:46.6 |
HIP 54488 |
10.67 |
| 2026-05-15 00:00 |
11:09:02.23 |
+29:39:31.9 |
HIP 54488 |
10.32 |
| 2026-05-15 12:00 |
11:09:00.34 |
+29:39:16.9 |
HIP 54488 |
9.99 |
| 2026-05-16 00:00 |
11:08:58.49 |
+29:39:01.7 |
HIP 54488 |
9.67 |
| 2026-05-16 12:00 |
11:08:56.68 |
+29:38:46.2 |
HIP 54488 |
9.35 |
| 2026-05-17 00:00 |
11:08:54.91 |
+29:38:30.4 |
HIP 54488 |
9.04 |
| 2026-05-17 12:00 |
11:08:53.17 |
+29:38:14.4 |
HIP 54488 |
8.75 |
| 2026-05-18 00:00 |
11:08:51.48 |
+29:37:58.2 |
HIP 54488 |
8.47 |
| 2026-05-18 12:00 |
11:08:49.81 |
+29:37:41.7 |
HIP 54488 |
8.20 |
| 2026-05-19 00:00 |
11:08:48.19 |
+29:37:25.0 |
HIP 54488 |
7.94 |
| 2026-05-19 12:00 |
11:08:46.60 |
+29:37:08.1 |
HIP 54488 |
7.69 |
| 2026-05-20 00:00 |
11:08:45.05 |
+29:36:50.9 |
HIP 54488 |
7.45 |
| 2026-05-20 12:00 |
11:08:43.54 |
+29:36:33.4 |
HIP 54488 |
7.23 |
| 2026-05-21 00:00 |
11:08:42.07 |
+29:36:15.8 |
HIP 54488 |
7.03 |
| 2026-05-21 12:00 |
11:08:40.63 |
+29:35:57.9 |
HIP 54488 |
6.84 |
| 2026-05-22 00:00 |
11:08:39.23 |
+29:35:39.8 |
HIP 54488 |
6.66 |
| 2026-05-22 12:00 |
11:08:37.87 |
+29:35:21.4 |
HIP 54488 |
6.51 |
| 2026-05-23 00:00 |
11:08:36.55 |
+29:35:02.8 |
HIP 54488 |
6.37 |
| 2026-05-23 12:00 |
11:08:35.26 |
+29:34:44.0 |
HIP 54488 |
6.24 |
| 2026-05-24 00:00 |
11:08:34.01 |
+29:34:25.0 |
HIP 54488 |
6.14 |
| 2026-05-24 12:00 |
11:08:32.80 |
+29:34:05.8 |
HIP 54488 |
6.05 |
| 2026-05-25 00:00 |
11:08:31.63 |
+29:33:46.3 |
HIP 54488 |
5.99 |
| 2026-05-25 12:00 |
11:08:30.49 |
+29:33:26.7 |
HIP 54488 |
5.94 |
| 2026-05-26 00:00 |
11:08:29.39 |
+29:33:06.8 |
HIP 54488 |
5.91 |
| 2026-05-26 12:00 |
11:08:28.33 |
+29:32:46.7 |
HIP 54488 |
5.91 |
| 2026-05-27 00:00 |
11:08:27.31 |
+29:32:26.4 |
HIP 54488 |
5.92 |
| 2026-05-27 12:00 |
11:08:26.32 |
+29:32:05.8 |
HIP 54488 |
5.95 |
| 2026-05-28 00:00 |
11:08:25.38 |
+29:31:45.1 |
HIP 54488 |
6.00 |
| 2026-05-28 12:00 |
11:08:24.47 |
+29:31:24.2 |
HIP 54488 |
6.06 |
| 2026-05-29 00:00 |
11:08:23.59 |
+29:31:03.1 |
HIP 54488 |
6.15 |
| 2026-05-29 12:00 |
11:08:22.76 |
+29:30:41.7 |
HIP 54488 |
6.24 |
| 2026-05-30 00:00 |
11:08:21.96 |
+29:30:20.2 |
HIP 54488 |
6.36 |
| 2026-05-30 12:00 |
11:08:21.20 |
+29:29:58.5 |
HIP 54488 |
6.49 |
| 2026-05-31 00:00 |
11:08:20.48 |
+29:29:36.5 |
HIP 54488 |
6.63 |
| 2026-05-31 12:00 |
11:08:19.79 |
+29:29:14.4 |
HIP 54488 |
6.78 |
| 2026-06-01 00:00 |
11:08:19.14 |
+29:28:52.1 |
HIP 54488 |
6.95 |
| 2026-06-01 12:00 |
11:08:18.53 |
+29:28:29.6 |
HIP 54488 |
7.12 |
| 2026-06-02 00:00 |
11:08:17.96 |
+29:28:06.9 |
HIP 54488 |
7.31 |