| Parameter |
Value |
| Designation |
124P/Mrkos |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-04-09T18:17:12.704640Z |
| Orbit solution date (soln_date, UTC) |
2026-05-08T13:42:12Z |
| Obs used |
3385 |
| NEO |
- |
| M1 |
16.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-02-21.0000000 |
| e |
0.50401453 |
| q (au) |
1.645769 |
| a (au) |
3.318181 |
| i (deg) |
31.532546 |
| Ω (om, deg) |
0.402145 |
| ω (w, deg) |
183.768516 |
| M (ma, deg) |
111.247425 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.726 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.726 |
| n |
2.000 |
| gf |
0.987 |
| gb |
-0.682 |
| k |
0.854 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
09:04:54.77 |
+26:32:14.7 |
HIP 44592 |
22.47 |
| 2026-05-12 12:00 |
09:05:41.88 |
+26:18:51.0 |
HIP 44592 |
12.23 |
| 2026-05-13 00:00 |
09:06:29.13 |
+26:05:27.9 |
HIP 44670 |
4.47 |
| 2026-05-13 12:00 |
09:07:16.51 |
+25:52:05.4 |
HIP 44806 |
16.70 |
| 2026-05-14 00:00 |
09:08:04.02 |
+25:38:43.5 |
HIP 44806 |
2.69 |
| 2026-05-14 12:00 |
09:08:51.67 |
+25:25:22.2 |
HIP 44995 |
17.30 |
| 2026-05-15 00:00 |
09:09:39.44 |
+25:12:01.5 |
HIP 44995 |
4.14 |
| 2026-05-15 12:00 |
09:10:27.35 |
+24:58:41.3 |
HIP 44995 |
18.01 |
| 2026-05-16 00:00 |
09:11:15.38 |
+24:45:21.8 |
HIP 44995 |
34.98 |
| 2026-05-16 12:00 |
09:12:03.53 |
+24:32:02.9 |
HIP 45268 |
24.99 |
| 2026-05-17 00:00 |
09:12:51.81 |
+24:18:44.5 |
HIP 45268 |
9.48 |
| 2026-05-17 12:00 |
09:13:40.21 |
+24:05:26.8 |
HIP 45268 |
12.26 |
| 2026-05-18 00:00 |
09:14:28.72 |
+23:52:09.6 |
HIP 45423 |
13.75 |
| 2026-05-18 12:00 |
09:15:17.36 |
+23:38:53.1 |
HIP 45423 |
7.43 |
| 2026-05-19 00:00 |
09:16:06.10 |
+23:25:37.1 |
HIP 45494 |
1.87 |
| 2026-05-19 12:00 |
09:16:54.96 |
+23:12:21.8 |
HIP 45606 |
13.93 |
| 2026-05-20 00:00 |
09:17:43.93 |
+22:59:07.0 |
HIP 45606 |
5.63 |
| 2026-05-20 12:00 |
09:18:33.01 |
+22:45:52.9 |
HIP 45606 |
21.77 |
| 2026-05-21 00:00 |
09:19:22.19 |
+22:32:39.3 |
HIP 45830 |
19.11 |
| 2026-05-21 12:00 |
09:20:11.48 |
+22:19:26.4 |
HIP 45830 |
20.57 |
| 2026-05-22 00:00 |
09:21:00.87 |
+22:06:14.1 |
HIP 45844 |
26.09 |
| 2026-05-22 12:00 |
09:21:50.36 |
+21:53:02.4 |
HIP 45844 |
19.22 |
| 2026-05-23 00:00 |
09:22:39.95 |
+21:39:51.3 |
HIP 45936 |
13.71 |
| 2026-05-23 12:00 |
09:23:29.63 |
+21:26:40.8 |
HIP 46038 |
8.29 |
| 2026-05-24 00:00 |
09:24:19.41 |
+21:13:30.9 |
HIP 46038 |
14.15 |
| 2026-05-24 12:00 |
09:25:09.28 |
+21:00:21.7 |
HIP 46038 |
30.81 |
| 2026-05-25 00:00 |
09:25:59.25 |
+20:47:13.0 |
HIP 46292 |
21.24 |
| 2026-05-25 12:00 |
09:26:49.30 |
+20:34:05.0 |
HIP 46292 |
9.12 |
| 2026-05-26 00:00 |
09:27:39.45 |
+20:20:57.5 |
HIP 46292 |
18.33 |
| 2026-05-26 12:00 |
09:28:29.68 |
+20:07:50.7 |
HIP 46419 |
19.98 |
| 2026-05-27 00:00 |
09:29:19.99 |
+19:54:44.5 |
HIP 46419 |
20.28 |
| 2026-05-27 12:00 |
09:30:10.39 |
+19:41:39.0 |
HIP 46751 |
28.88 |
| 2026-05-28 00:00 |
09:31:00.88 |
+19:28:34.0 |
HIP 46570 |
28.10 |
| 2026-05-28 12:00 |
09:31:51.44 |
+19:15:29.6 |
HIP 46570 |
30.20 |
| 2026-05-29 00:00 |
09:32:42.09 |
+19:02:25.9 |
HIP 46910 |
22.61 |
| 2026-05-29 12:00 |
09:33:32.82 |
+18:49:22.8 |
HIP 46910 |
5.36 |
| 2026-05-30 00:00 |
09:34:23.62 |
+18:36:20.2 |
HIP 46910 |
13.25 |
| 2026-05-30 12:00 |
09:35:14.51 |
+18:23:18.3 |
HIP 46900 |
26.27 |
| 2026-05-31 00:00 |
09:36:05.47 |
+18:10:17.0 |
HIP 46986 |
24.62 |
| 2026-05-31 12:00 |
09:36:56.51 |
+17:57:16.3 |
HIP 46986 |
33.55 |
| 2026-06-01 00:00 |
09:37:47.62 |
+17:44:16.2 |
HIP 47274 |
23.29 |
| 2026-06-01 12:00 |
09:38:38.80 |
+17:31:16.7 |
HIP 47375 |
7.73 |
| 2026-06-02 00:00 |
09:39:30.06 |
+17:18:17.8 |
HIP 47375 |
11.07 |