| 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) |
| 2026-03-26 00:00 |
08:47:22.23 |
+06:42:04.6 |
HIP 43109 |
19.11 |
| 2026-03-26 12:00 |
08:47:19.29 |
+06:42:34.9 |
HIP 43109 |
19.24 |
| 2026-03-27 00:00 |
08:47:16.39 |
+06:43:05.1 |
HIP 43109 |
19.41 |
| 2026-03-27 12:00 |
08:47:13.55 |
+06:43:35.2 |
HIP 43109 |
19.63 |
| 2026-03-28 00:00 |
08:47:10.76 |
+06:44:05.2 |
HIP 43109 |
19.88 |
| 2026-03-28 12:00 |
08:47:08.01 |
+06:44:35.0 |
HIP 43109 |
20.16 |
| 2026-03-29 00:00 |
08:47:05.32 |
+06:45:04.7 |
HIP 43109 |
20.48 |
| 2026-03-29 12:00 |
08:47:02.68 |
+06:45:34.2 |
HIP 43109 |
20.82 |
| 2026-03-30 00:00 |
08:47:00.09 |
+06:46:03.6 |
HIP 43109 |
21.19 |
| 2026-03-30 12:00 |
08:46:57.56 |
+06:46:32.8 |
HIP 43109 |
21.58 |
| 2026-03-31 00:00 |
08:46:55.07 |
+06:47:02.0 |
HIP 43109 |
22.00 |
| 2026-03-31 12:00 |
08:46:52.64 |
+06:47:30.9 |
HIP 43109 |
22.43 |
| 2026-04-01 00:00 |
08:46:50.25 |
+06:47:59.7 |
HIP 43109 |
22.88 |
| 2026-04-01 12:00 |
08:46:47.92 |
+06:48:28.4 |
HIP 43109 |
23.34 |
| 2026-04-02 00:00 |
08:46:45.65 |
+06:48:56.9 |
HIP 43109 |
23.81 |
| 2026-04-02 12:00 |
08:46:43.42 |
+06:49:25.2 |
HIP 43109 |
24.30 |
| 2026-04-03 00:00 |
08:46:41.25 |
+06:49:53.4 |
HIP 43109 |
24.79 |
| 2026-04-03 12:00 |
08:46:39.13 |
+06:50:21.4 |
HIP 43109 |
25.29 |
| 2026-04-04 00:00 |
08:46:37.06 |
+06:50:49.3 |
HIP 43109 |
25.80 |
| 2026-04-04 12:00 |
08:46:35.04 |
+06:51:17.0 |
HIP 43109 |
26.31 |
| 2026-04-05 00:00 |
08:46:33.08 |
+06:51:44.6 |
HIP 43109 |
26.82 |
| 2026-04-05 12:00 |
08:46:31.17 |
+06:52:11.9 |
HIP 43109 |
27.34 |
| 2026-04-06 00:00 |
08:46:29.32 |
+06:52:39.2 |
HIP 43109 |
27.85 |
| 2026-04-06 12:00 |
08:46:27.51 |
+06:53:06.2 |
HIP 43109 |
28.37 |
| 2026-04-07 00:00 |
08:46:25.76 |
+06:53:33.1 |
HIP 43109 |
28.89 |
| 2026-04-07 12:00 |
08:46:24.07 |
+06:53:59.8 |
HIP 43109 |
29.40 |
| 2026-04-08 00:00 |
08:46:22.42 |
+06:54:26.3 |
HIP 43109 |
29.91 |
| 2026-04-08 12:00 |
08:46:20.84 |
+06:54:52.6 |
HIP 43109 |
30.43 |
| 2026-04-09 00:00 |
08:46:19.30 |
+06:55:18.8 |
HIP 43109 |
30.93 |
| 2026-04-09 12:00 |
08:46:17.82 |
+06:55:44.8 |
HIP 43109 |
31.44 |
| 2026-04-10 00:00 |
08:46:16.39 |
+06:56:10.6 |
HIP 43109 |
31.94 |
| 2026-04-10 12:00 |
08:46:15.02 |
+06:56:36.2 |
HIP 43109 |
32.43 |
| 2026-04-11 00:00 |
08:46:13.70 |
+06:57:01.6 |
HIP 43109 |
32.93 |
| 2026-04-11 12:00 |
08:46:12.43 |
+06:57:26.9 |
HIP 43109 |
33.41 |
| 2026-04-12 00:00 |
08:46:11.22 |
+06:57:51.9 |
HIP 43109 |
33.89 |
| 2026-04-12 12:00 |
08:46:10.06 |
+06:58:16.8 |
HIP 43109 |
34.37 |
| 2026-04-13 00:00 |
08:46:08.96 |
+06:58:41.5 |
HIP 43109 |
34.84 |
| 2026-04-13 12:00 |
08:46:07.91 |
+06:59:05.9 |
HIP 43109 |
35.30 |
| 2026-04-14 00:00 |
08:46:06.92 |
+06:59:30.2 |
HIP 43109 |
35.76 |
| 2026-04-14 12:00 |
08:46:05.98 |
+06:59:54.3 |
HIP 43109 |
36.21 |
| 2026-04-15 00:00 |
08:46:05.09 |
+07:00:18.2 |
HIP 43109 |
36.65 |
| 2026-04-15 12:00 |
08:46:04.26 |
+07:00:41.9 |
HIP 43109 |
37.09 |
| 2026-04-16 00:00 |
08:46:03.49 |
+07:01:05.3 |
HIP 43109 |
37.52 |