| Parameter |
Value |
| Designation |
C/1952 W1 (Mrkos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1953-01-24T20:37:26.682240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:10Z |
| Obs used |
6 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1953-05-04.0000000 |
| e |
1.00019124 |
| q (au) |
0.777758 |
| a (au) |
-4066.956181 |
| i (deg) |
97.176622 |
| Ω (om, deg) |
343.578585 |
| ω (w, deg) |
253.819495 |
| M (ma, deg) |
0.000377 |
Magnitude
Scatter + Global Linear
$$
M_a = (8.778 + 4.911\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
8.778 |
| n |
4.911 |
| gf |
0.800 |
| gb |
-0.677 |
| 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) |
| 2026-03-26 00:00 |
20:22:46.88 |
+46:01:33.9 |
HIP 100437 |
15.64 |
| 2026-03-26 12:00 |
20:22:47.68 |
+46:01:49.4 |
HIP 100437 |
15.93 |
| 2026-03-27 00:00 |
20:22:48.48 |
+46:02:04.9 |
HIP 100437 |
16.23 |
| 2026-03-27 12:00 |
20:22:49.26 |
+46:02:20.4 |
HIP 100437 |
16.52 |
| 2026-03-28 00:00 |
20:22:50.02 |
+46:02:36.0 |
HIP 100437 |
16.81 |
| 2026-03-28 12:00 |
20:22:50.78 |
+46:02:51.6 |
HIP 100437 |
17.10 |
| 2026-03-29 00:00 |
20:22:51.52 |
+46:03:07.3 |
HIP 100437 |
17.39 |
| 2026-03-29 12:00 |
20:22:52.24 |
+46:03:23.1 |
HIP 100437 |
17.68 |
| 2026-03-30 00:00 |
20:22:52.96 |
+46:03:38.8 |
HIP 100437 |
17.97 |
| 2026-03-30 12:00 |
20:22:53.66 |
+46:03:54.7 |
HIP 100437 |
18.26 |
| 2026-03-31 00:00 |
20:22:54.35 |
+46:04:10.5 |
HIP 100437 |
18.55 |
| 2026-03-31 12:00 |
20:22:55.02 |
+46:04:26.4 |
HIP 100437 |
18.84 |
| 2026-04-01 00:00 |
20:22:55.68 |
+46:04:42.4 |
HIP 100437 |
19.13 |
| 2026-04-01 12:00 |
20:22:56.33 |
+46:04:58.4 |
HIP 100437 |
19.42 |
| 2026-04-02 00:00 |
20:22:56.97 |
+46:05:14.4 |
HIP 100562 |
19.31 |
| 2026-04-02 12:00 |
20:22:57.59 |
+46:05:30.5 |
HIP 100562 |
19.02 |
| 2026-04-03 00:00 |
20:22:58.20 |
+46:05:46.6 |
HIP 100562 |
18.73 |
| 2026-04-03 12:00 |
20:22:58.79 |
+46:06:02.7 |
HIP 100562 |
18.44 |
| 2026-04-04 00:00 |
20:22:59.37 |
+46:06:18.9 |
HIP 100562 |
18.16 |
| 2026-04-04 12:00 |
20:22:59.94 |
+46:06:35.1 |
HIP 100562 |
17.87 |
| 2026-04-05 00:00 |
20:23:00.50 |
+46:06:51.4 |
HIP 100562 |
17.58 |
| 2026-04-05 12:00 |
20:23:01.04 |
+46:07:07.6 |
HIP 100562 |
17.30 |
| 2026-04-06 00:00 |
20:23:01.56 |
+46:07:24.0 |
HIP 100562 |
17.01 |
| 2026-04-06 12:00 |
20:23:02.08 |
+46:07:40.3 |
HIP 100562 |
16.73 |
| 2026-04-07 00:00 |
20:23:02.58 |
+46:07:56.7 |
HIP 100562 |
16.44 |
| 2026-04-07 12:00 |
20:23:03.06 |
+46:08:13.0 |
HIP 100562 |
16.15 |
| 2026-04-08 00:00 |
20:23:03.54 |
+46:08:29.5 |
HIP 100562 |
15.87 |
| 2026-04-08 12:00 |
20:23:03.99 |
+46:08:45.9 |
HIP 100562 |
15.58 |
| 2026-04-09 00:00 |
20:23:04.44 |
+46:09:02.4 |
HIP 100562 |
15.30 |
| 2026-04-09 12:00 |
20:23:04.87 |
+46:09:18.8 |
HIP 100562 |
15.01 |
| 2026-04-10 00:00 |
20:23:05.28 |
+46:09:35.4 |
HIP 100562 |
14.73 |
| 2026-04-10 12:00 |
20:23:05.69 |
+46:09:51.9 |
HIP 100562 |
14.44 |
| 2026-04-11 00:00 |
20:23:06.08 |
+46:10:08.4 |
HIP 100562 |
14.16 |
| 2026-04-11 12:00 |
20:23:06.45 |
+46:10:25.0 |
HIP 100562 |
13.88 |
| 2026-04-12 00:00 |
20:23:06.81 |
+46:10:41.6 |
HIP 100562 |
13.59 |
| 2026-04-12 12:00 |
20:23:07.16 |
+46:10:58.2 |
HIP 100562 |
13.31 |
| 2026-04-13 00:00 |
20:23:07.49 |
+46:11:14.8 |
HIP 100562 |
13.03 |
| 2026-04-13 12:00 |
20:23:07.81 |
+46:11:31.4 |
HIP 100562 |
12.75 |
| 2026-04-14 00:00 |
20:23:08.11 |
+46:11:48.1 |
HIP 100562 |
12.47 |
| 2026-04-14 12:00 |
20:23:08.40 |
+46:12:04.7 |
HIP 100562 |
12.19 |
| 2026-04-15 00:00 |
20:23:08.67 |
+46:12:21.4 |
HIP 100562 |
11.91 |
| 2026-04-15 12:00 |
20:23:08.93 |
+46:12:38.0 |
HIP 100562 |
11.63 |
| 2026-04-16 00:00 |
20:23:09.18 |
+46:12:54.7 |
HIP 100562 |
11.35 |