124P/Mrkos
| Parameter |
Value |
| Designation |
124P/Mrkos |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-04-09T15:02:35.545920Z |
| Orbit solution date (soln_date, UTC) |
2026-01-13T08:12:54Z |
| Obs used |
2990 |
| NEO |
- |
| M1 |
16.400 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-09-15.0000000 |
| e |
0.50390395 |
| q (au) |
1.645371 |
| a (au) |
3.316638 |
| i (deg) |
31.528557 |
| Ω (om, deg) |
0.412979 |
| ω (w, deg) |
183.718863 |
| M (ma, deg) |
25.842747 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.663 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.663 |
| n |
2.000 |
| gf |
0.936 |
| gb |
-0.740 |
| k |
0.875 |
| δ90 |
1.000 |
| 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) |
| 2026-02-03 00:00 |
09:04:49.03 |
+64:34:48.9 |
HIP 44666 |
14.68 |
| 2026-02-03 12:00 |
09:03:34.41 |
+64:31:58.8 |
HIP 44666 |
22.17 |
| 2026-02-04 00:00 |
09:02:19.88 |
+64:28:58.0 |
HIP 44666 |
30.30 |
| 2026-02-04 12:00 |
09:01:05.50 |
+64:25:46.6 |
HIP 44021 |
21.84 |
| 2026-02-05 00:00 |
08:59:51.31 |
+64:22:24.5 |
HIP 44021 |
13.19 |
| 2026-02-05 12:00 |
08:58:37.34 |
+64:18:51.8 |
HIP 44021 |
4.66 |
| 2026-02-06 00:00 |
08:57:23.63 |
+64:15:08.3 |
HIP 44021 |
4.89 |
| 2026-02-06 12:00 |
08:56:10.23 |
+64:11:14.2 |
HIP 44021 |
13.56 |
| 2026-02-07 00:00 |
08:54:57.17 |
+64:07:09.4 |
HIP 43745 |
21.76 |
| 2026-02-07 12:00 |
08:53:44.50 |
+64:02:53.9 |
HIP 43745 |
18.27 |
| 2026-02-08 00:00 |
08:52:32.25 |
+63:58:27.7 |
HIP 43745 |
18.79 |
| 2026-02-08 12:00 |
08:51:20.47 |
+63:53:50.8 |
HIP 43745 |
23.11 |
| 2026-02-09 00:00 |
08:50:09.19 |
+63:49:03.4 |
HIP 43332 |
27.00 |
| 2026-02-09 12:00 |
08:48:58.44 |
+63:44:05.3 |
HIP 43278 |
24.63 |
| 2026-02-10 00:00 |
08:47:48.26 |
+63:38:56.7 |
HIP 43278 |
21.04 |
| 2026-02-10 12:00 |
08:46:38.70 |
+63:33:37.6 |
HIP 42906 |
20.89 |
| 2026-02-11 00:00 |
08:45:29.78 |
+63:28:07.9 |
HIP 42801 |
17.20 |
| 2026-02-11 12:00 |
08:44:21.53 |
+63:22:27.9 |
HIP 42801 |
7.94 |
| 2026-02-12 00:00 |
08:43:14.00 |
+63:16:37.5 |
HIP 42801 |
3.44 |
| 2026-02-12 12:00 |
08:42:07.21 |
+63:10:36.8 |
HIP 42725 |
5.22 |
| 2026-02-13 00:00 |
08:41:01.19 |
+63:04:25.8 |
HIP 42725 |
9.62 |
| 2026-02-13 12:00 |
08:39:55.97 |
+62:58:04.7 |
HIP 42725 |
18.61 |
| 2026-02-14 00:00 |
08:38:51.58 |
+62:51:33.5 |
HIP 42725 |
28.15 |
| 2026-02-14 12:00 |
08:37:48.06 |
+62:44:52.4 |
HIP 41944 |
33.13 |
| 2026-02-15 00:00 |
08:36:45.41 |
+62:38:01.2 |
HIP 41944 |
28.59 |
| 2026-02-15 12:00 |
08:35:43.68 |
+62:31:00.3 |
HIP 41944 |
27.23 |
| 2026-02-16 00:00 |
08:34:42.88 |
+62:23:49.6 |
HIP 41944 |
29.56 |
| 2026-02-16 12:00 |
08:33:43.04 |
+62:16:29.3 |
HIP 41748 |
27.46 |
| 2026-02-17 00:00 |
08:32:44.18 |
+62:08:59.5 |
HIP 41748 |
17.40 |
| 2026-02-17 12:00 |
08:31:46.32 |
+62:01:20.2 |
HIP 41748 |
7.61 |
| 2026-02-18 00:00 |
08:30:49.48 |
+61:53:31.7 |
HIP 41748 |
4.84 |
| 2026-02-18 12:00 |
08:29:53.68 |
+61:45:33.9 |
HIP 41689 |
1.93 |
| 2026-02-19 00:00 |
08:28:58.93 |
+61:37:27.1 |
HIP 41689 |
9.15 |
| 2026-02-19 12:00 |
08:28:05.26 |
+61:29:11.3 |
HIP 41689 |
19.53 |
| 2026-02-20 00:00 |
08:27:12.66 |
+61:20:46.6 |
HIP 41568 |
15.63 |
| 2026-02-20 12:00 |
08:26:21.17 |
+61:12:13.3 |
HIP 41568 |
16.33 |
| 2026-02-21 00:00 |
08:25:30.79 |
+61:03:31.3 |
HIP 41097 |
19.88 |
| 2026-02-21 12:00 |
08:24:41.53 |
+60:54:41.0 |
HIP 41097 |
21.29 |
| 2026-02-22 00:00 |
08:23:53.40 |
+60:45:42.3 |
HIP 41060 |
11.55 |
| 2026-02-22 12:00 |
08:23:06.41 |
+60:36:35.4 |
HIP 41060 |
3.03 |
| 2026-02-23 00:00 |
08:22:20.57 |
+60:27:20.5 |
HIP 41060 |
10.92 |
| 2026-02-23 12:00 |
08:21:35.88 |
+60:17:57.6 |
HIP 41031 |
16.23 |
| 2026-02-24 00:00 |
08:20:52.35 |
+60:08:27.1 |
HIP 41031 |
12.96 |