| Parameter |
Value |
| Designation |
P/2018 V5 (Trujillo-Sheppard) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-10-03T20:45:02.079360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:48Z |
| Obs used |
21 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
19.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-11-06T12:29:37.939200Z |
| Discovery magnitude (MPC) |
22.21 G |
| Discovery observatory (MPC) |
T09 · Subaru Telescope, Maunakea |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-08-01.0000000 |
| e |
0.47462980 |
| q (au) |
4.707643 |
| a (au) |
8.960620 |
| i (deg) |
10.580193 |
| Ω (om, deg) |
171.328440 |
| ω (w, deg) |
260.805603 |
| M (ma, deg) |
357.653302 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.719 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.719 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.584 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
14:18:10.60 |
-05:06:24.2 |
HIP 70016 |
21.24 |
| 2026-06-01 12:00 |
14:18:04.43 |
-05:06:01.2 |
HIP 70016 |
22.81 |
| 2026-06-02 00:00 |
14:17:58.32 |
-05:05:38.6 |
HIP 70016 |
24.37 |
| 2026-06-02 12:00 |
14:17:52.27 |
-05:05:16.5 |
HIP 70016 |
25.92 |
| 2026-06-03 00:00 |
14:17:46.27 |
-05:04:54.8 |
HIP 70016 |
27.45 |
| 2026-06-03 12:00 |
14:17:40.33 |
-05:04:33.6 |
HIP 70016 |
28.96 |
| 2026-06-04 00:00 |
14:17:34.45 |
-05:04:12.8 |
HIP 70016 |
30.46 |
| 2026-06-04 12:00 |
14:17:28.63 |
-05:03:52.5 |
HIP 70016 |
31.95 |
| 2026-06-05 00:00 |
14:17:22.86 |
-05:03:32.6 |
HIP 70016 |
33.42 |
| 2026-06-05 12:00 |
14:17:17.16 |
-05:03:13.2 |
HIP 70016 |
34.87 |
| 2026-06-06 00:00 |
14:17:11.51 |
-05:02:54.3 |
HIP 69775 |
36.16 |
| 2026-06-06 12:00 |
14:17:05.93 |
-05:02:35.8 |
HIP 69775 |
36.28 |
| 2026-06-07 00:00 |
14:17:00.41 |
-05:02:17.8 |
HIP 69775 |
36.45 |
| 2026-06-07 12:00 |
14:16:54.95 |
-05:02:00.2 |
HIP 69775 |
36.66 |
| 2026-06-08 00:00 |
14:16:49.55 |
-05:01:43.1 |
HIP 69775 |
36.92 |
| 2026-06-08 12:00 |
14:16:44.21 |
-05:01:26.5 |
HIP 69586 |
36.53 |
| 2026-06-09 00:00 |
14:16:38.94 |
-05:01:10.4 |
HIP 69586 |
35.53 |
| 2026-06-09 12:00 |
14:16:33.73 |
-05:00:54.7 |
HIP 69572 |
34.33 |
| 2026-06-10 00:00 |
14:16:28.59 |
-05:00:39.5 |
HIP 69572 |
33.06 |
| 2026-06-10 12:00 |
14:16:23.51 |
-05:00:24.7 |
HIP 69572 |
31.81 |
| 2026-06-11 00:00 |
14:16:18.50 |
-05:00:10.5 |
HIP 69572 |
30.57 |
| 2026-06-11 12:00 |
14:16:13.55 |
-04:59:56.7 |
HIP 69572 |
29.36 |
| 2026-06-12 00:00 |
14:16:08.67 |
-04:59:43.4 |
HIP 69572 |
28.18 |
| 2026-06-12 12:00 |
14:16:03.86 |
-04:59:30.5 |
HIP 69572 |
27.01 |
| 2026-06-13 00:00 |
14:15:59.11 |
-04:59:18.2 |
HIP 69572 |
25.87 |
| 2026-06-13 12:00 |
14:15:54.43 |
-04:59:06.3 |
HIP 69572 |
24.75 |
| 2026-06-14 00:00 |
14:15:49.83 |
-04:58:54.9 |
HIP 69572 |
23.66 |
| 2026-06-14 12:00 |
14:15:45.29 |
-04:58:44.0 |
HIP 69572 |
22.59 |
| 2026-06-15 00:00 |
14:15:40.82 |
-04:58:33.6 |
HIP 69572 |
21.55 |
| 2026-06-15 12:00 |
14:15:36.42 |
-04:58:23.7 |
HIP 69572 |
20.53 |
| 2026-06-16 00:00 |
14:15:32.09 |
-04:58:14.2 |
HIP 69572 |
19.55 |
| 2026-06-16 12:00 |
14:15:27.83 |
-04:58:05.2 |
HIP 69572 |
18.60 |
| 2026-06-17 00:00 |
14:15:23.64 |
-04:57:56.7 |
HIP 69572 |
17.68 |
| 2026-06-17 12:00 |
14:15:19.53 |
-04:57:48.8 |
HIP 69572 |
16.80 |
| 2026-06-18 00:00 |
14:15:15.48 |
-04:57:41.2 |
HIP 69572 |
15.95 |
| 2026-06-18 12:00 |
14:15:11.51 |
-04:57:34.2 |
HIP 69572 |
15.14 |
| 2026-06-19 00:00 |
14:15:07.61 |
-04:57:27.7 |
HIP 69572 |
14.37 |
| 2026-06-19 12:00 |
14:15:03.79 |
-04:57:21.6 |
HIP 69572 |
13.65 |
| 2026-06-20 00:00 |
14:15:00.04 |
-04:57:16.0 |
HIP 69572 |
12.98 |
| 2026-06-20 12:00 |
14:14:56.36 |
-04:57:11.0 |
HIP 69572 |
12.36 |
| 2026-06-21 00:00 |
14:14:52.76 |
-04:57:06.4 |
HIP 69572 |
11.79 |
| 2026-06-21 12:00 |
14:14:49.23 |
-04:57:02.2 |
HIP 69572 |
11.29 |
| 2026-06-22 00:00 |
14:14:45.77 |
-04:56:58.6 |
HIP 69572 |
10.84 |