| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
11:08:17.42 |
+29:27:44.0 |
HIP 54488 |
7.50 |
| 2026-06-03 00:00 |
11:08:16.92 |
+29:27:20.9 |
HIP 54488 |
7.71 |
| 2026-06-03 12:00 |
11:08:16.46 |
+29:26:57.7 |
HIP 54488 |
7.92 |
| 2026-06-04 00:00 |
11:08:16.04 |
+29:26:34.3 |
HIP 54488 |
8.14 |
| 2026-06-04 12:00 |
11:08:15.65 |
+29:26:10.7 |
HIP 54488 |
8.37 |
| 2026-06-05 00:00 |
11:08:15.30 |
+29:25:46.9 |
HIP 54488 |
8.60 |
| 2026-06-05 12:00 |
11:08:14.99 |
+29:25:22.9 |
HIP 54488 |
8.84 |
| 2026-06-06 00:00 |
11:08:14.72 |
+29:24:58.8 |
HIP 54488 |
9.09 |
| 2026-06-06 12:00 |
11:08:14.48 |
+29:24:34.4 |
HIP 54488 |
9.34 |
| 2026-06-07 00:00 |
11:08:14.28 |
+29:24:10.0 |
HIP 54488 |
9.60 |
| 2026-06-07 12:00 |
11:08:14.11 |
+29:23:45.3 |
HIP 54488 |
9.86 |
| 2026-06-08 00:00 |
11:08:13.99 |
+29:23:20.5 |
HIP 54488 |
10.13 |
| 2026-06-08 12:00 |
11:08:13.90 |
+29:22:55.5 |
HIP 54488 |
10.41 |
| 2026-06-09 00:00 |
11:08:13.85 |
+29:22:30.3 |
HIP 54488 |
10.68 |
| 2026-06-09 12:00 |
11:08:13.83 |
+29:22:05.0 |
HIP 54488 |
10.97 |
| 2026-06-10 00:00 |
11:08:13.85 |
+29:21:39.5 |
HIP 54488 |
11.26 |
| 2026-06-10 12:00 |
11:08:13.91 |
+29:21:13.9 |
HIP 54488 |
11.55 |
| 2026-06-11 00:00 |
11:08:14.00 |
+29:20:48.1 |
HIP 54488 |
11.85 |
| 2026-06-11 12:00 |
11:08:14.14 |
+29:20:22.2 |
HIP 54488 |
12.15 |
| 2026-06-12 00:00 |
11:08:14.31 |
+29:19:56.1 |
HIP 54488 |
12.46 |
| 2026-06-12 12:00 |
11:08:14.51 |
+29:19:29.8 |
HIP 54488 |
12.77 |
| 2026-06-13 00:00 |
11:08:14.75 |
+29:19:03.4 |
HIP 54488 |
13.08 |
| 2026-06-13 12:00 |
11:08:15.03 |
+29:18:36.9 |
HIP 54488 |
13.40 |
| 2026-06-14 00:00 |
11:08:15.35 |
+29:18:10.2 |
HIP 54488 |
13.73 |
| 2026-06-14 12:00 |
11:08:15.70 |
+29:17:43.4 |
HIP 54488 |
14.06 |
| 2026-06-15 00:00 |
11:08:16.09 |
+29:17:16.4 |
HIP 54488 |
14.39 |
| 2026-06-15 12:00 |
11:08:16.51 |
+29:16:49.3 |
HIP 54488 |
14.73 |
| 2026-06-16 00:00 |
11:08:16.97 |
+29:16:22.0 |
HIP 54488 |
15.08 |
| 2026-06-16 12:00 |
11:08:17.47 |
+29:15:54.7 |
HIP 54488 |
15.42 |
| 2026-06-17 00:00 |
11:08:18.00 |
+29:15:27.2 |
HIP 54480 |
15.40 |
| 2026-06-17 12:00 |
11:08:18.57 |
+29:14:59.5 |
HIP 54480 |
14.93 |
| 2026-06-18 00:00 |
11:08:19.17 |
+29:14:31.7 |
HIP 54480 |
14.45 |
| 2026-06-18 12:00 |
11:08:19.81 |
+29:14:03.9 |
HIP 54480 |
13.97 |
| 2026-06-19 00:00 |
11:08:20.48 |
+29:13:35.8 |
HIP 54480 |
13.48 |
| 2026-06-19 12:00 |
11:08:21.20 |
+29:13:07.7 |
HIP 54480 |
12.99 |
| 2026-06-20 00:00 |
11:08:21.94 |
+29:12:39.5 |
HIP 54480 |
12.50 |
| 2026-06-20 12:00 |
11:08:22.72 |
+29:12:11.1 |
HIP 54480 |
12.00 |
| 2026-06-21 00:00 |
11:08:23.54 |
+29:11:42.6 |
HIP 54480 |
11.49 |
| 2026-06-21 12:00 |
11:08:24.39 |
+29:11:14.0 |
HIP 54480 |
10.98 |
| 2026-06-22 00:00 |
11:08:25.27 |
+29:10:45.3 |
HIP 54480 |
10.47 |