| Parameter |
Value |
| Designation |
C/2019 K5 (Young) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-06-22T18:02:04.787520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:56Z |
| Obs used |
734 |
| NEO |
- |
| M1 |
12.100 |
| K1 |
9.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-05-25T14:10:08.054400Z |
| Discovery magnitude (MPC) |
17.10 o |
| Discovery observatory (MPC) |
T08 · ATLAS-MLO, Mauna Loa |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-09-13.0000000 |
| e |
0.98653488 |
| q (au) |
2.035047 |
| a (au) |
151.134694 |
| i (deg) |
15.315381 |
| Ω (om, deg) |
177.188411 |
| ω (w, deg) |
174.916616 |
| M (ma, deg) |
0.043630 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.210 + 4.027\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.210 |
| n |
4.027 |
| gf |
1.000 |
| gb |
-0.801 |
| k |
0.998 |
| 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) |
| 2026-05-12 00:00 |
08:46:37.08 |
+07:16:16.5 |
HIP 43143 |
22.39 |
| 2026-05-12 12:00 |
08:46:39.09 |
+07:16:27.6 |
HIP 43143 |
22.01 |
| 2026-05-13 00:00 |
08:46:41.16 |
+07:16:38.6 |
HIP 43143 |
21.64 |
| 2026-05-13 12:00 |
08:46:43.27 |
+07:16:49.2 |
HIP 43143 |
21.28 |
| 2026-05-14 00:00 |
08:46:45.43 |
+07:16:59.6 |
HIP 43143 |
20.92 |
| 2026-05-14 12:00 |
08:46:47.65 |
+07:17:09.8 |
HIP 43143 |
20.57 |
| 2026-05-15 00:00 |
08:46:49.91 |
+07:17:19.7 |
HIP 43143 |
20.24 |
| 2026-05-15 12:00 |
08:46:52.22 |
+07:17:29.4 |
HIP 43143 |
19.91 |
| 2026-05-16 00:00 |
08:46:54.57 |
+07:17:38.7 |
HIP 43143 |
19.60 |
| 2026-05-16 12:00 |
08:46:56.98 |
+07:17:47.9 |
HIP 43143 |
19.31 |
| 2026-05-17 00:00 |
08:46:59.43 |
+07:17:56.8 |
HIP 43143 |
19.03 |
| 2026-05-17 12:00 |
08:47:01.93 |
+07:18:05.4 |
HIP 43143 |
18.77 |
| 2026-05-18 00:00 |
08:47:04.48 |
+07:18:13.8 |
HIP 43143 |
18.53 |
| 2026-05-18 12:00 |
08:47:07.07 |
+07:18:21.9 |
HIP 43143 |
18.31 |
| 2026-05-19 00:00 |
08:47:09.72 |
+07:18:29.7 |
HIP 43143 |
18.12 |
| 2026-05-19 12:00 |
08:47:12.41 |
+07:18:37.3 |
HIP 43143 |
17.96 |
| 2026-05-20 00:00 |
08:47:15.14 |
+07:18:44.7 |
HIP 43143 |
17.82 |
| 2026-05-20 12:00 |
08:47:17.92 |
+07:18:51.8 |
HIP 43143 |
17.71 |
| 2026-05-21 00:00 |
08:47:20.75 |
+07:18:58.6 |
HIP 43143 |
17.64 |
| 2026-05-21 12:00 |
08:47:23.62 |
+07:19:05.2 |
HIP 43143 |
17.60 |
| 2026-05-22 00:00 |
08:47:26.54 |
+07:19:11.5 |
HIP 43143 |
17.60 |
| 2026-05-22 12:00 |
08:47:29.50 |
+07:19:17.5 |
HIP 43143 |
17.63 |
| 2026-05-23 00:00 |
08:47:32.51 |
+07:19:23.3 |
HIP 43143 |
17.70 |
| 2026-05-23 12:00 |
08:47:35.56 |
+07:19:28.9 |
HIP 43143 |
17.81 |
| 2026-05-24 00:00 |
08:47:38.66 |
+07:19:34.2 |
HIP 43143 |
17.96 |
| 2026-05-24 12:00 |
08:47:41.80 |
+07:19:39.2 |
HIP 43143 |
18.15 |
| 2026-05-25 00:00 |
08:47:44.98 |
+07:19:44.0 |
HIP 43143 |
18.38 |
| 2026-05-25 12:00 |
08:47:48.21 |
+07:19:48.5 |
HIP 43143 |
18.64 |
| 2026-05-26 00:00 |
08:47:51.48 |
+07:19:52.8 |
HIP 43143 |
18.95 |
| 2026-05-26 12:00 |
08:47:54.80 |
+07:19:56.8 |
HIP 43143 |
19.29 |
| 2026-05-27 00:00 |
08:47:58.15 |
+07:20:00.5 |
HIP 43143 |
19.68 |
| 2026-05-27 12:00 |
08:48:01.55 |
+07:20:04.0 |
HIP 43143 |
20.10 |
| 2026-05-28 00:00 |
08:48:04.99 |
+07:20:07.3 |
HIP 43143 |
20.55 |
| 2026-05-28 12:00 |
08:48:08.48 |
+07:20:10.2 |
HIP 43143 |
21.04 |
| 2026-05-29 00:00 |
08:48:12.00 |
+07:20:13.0 |
HIP 43143 |
21.57 |
| 2026-05-29 12:00 |
08:48:15.57 |
+07:20:15.5 |
HIP 43143 |
22.12 |
| 2026-05-30 00:00 |
08:48:19.18 |
+07:20:17.7 |
HIP 43143 |
22.71 |
| 2026-05-30 12:00 |
08:48:22.82 |
+07:20:19.7 |
HIP 43143 |
23.33 |
| 2026-05-31 00:00 |
08:48:26.51 |
+07:20:21.4 |
HIP 43349 |
23.62 |
| 2026-05-31 12:00 |
08:48:30.24 |
+07:20:22.8 |
HIP 43349 |
22.81 |
| 2026-06-01 00:00 |
08:48:34.01 |
+07:20:24.1 |
HIP 43349 |
22.01 |
| 2026-06-01 12:00 |
08:48:37.82 |
+07:20:25.0 |
HIP 43349 |
21.21 |
| 2026-06-02 00:00 |
08:48:41.67 |
+07:20:25.7 |
HIP 43349 |
20.42 |