| 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) |
| 2026-07-29 00:00 |
20:19:38.92 |
+46:46:44.1 |
HIP 100250 |
4.57 |
| 2026-07-29 12:00 |
20:19:37.21 |
+46:46:41.6 |
HIP 100250 |
4.79 |
| 2026-07-30 00:00 |
20:19:35.50 |
+46:46:38.9 |
HIP 100250 |
5.02 |
| 2026-07-30 12:00 |
20:19:33.79 |
+46:46:36.1 |
HIP 100250 |
5.26 |
| 2026-07-31 00:00 |
20:19:32.08 |
+46:46:33.2 |
HIP 100250 |
5.51 |
| 2026-07-31 12:00 |
20:19:30.38 |
+46:46:30.2 |
HIP 100250 |
5.77 |
| 2026-08-01 00:00 |
20:19:28.67 |
+46:46:27.0 |
HIP 100250 |
6.02 |
| 2026-08-01 12:00 |
20:19:26.97 |
+46:46:23.6 |
HIP 100250 |
6.29 |
| 2026-08-02 00:00 |
20:19:25.27 |
+46:46:20.2 |
HIP 100250 |
6.55 |
| 2026-08-02 12:00 |
20:19:23.57 |
+46:46:16.6 |
HIP 100250 |
6.82 |
| 2026-08-03 00:00 |
20:19:21.87 |
+46:46:12.8 |
HIP 100250 |
7.10 |
| 2026-08-03 12:00 |
20:19:20.18 |
+46:46:08.9 |
HIP 100250 |
7.38 |
| 2026-08-04 00:00 |
20:19:18.48 |
+46:46:04.9 |
HIP 100250 |
7.65 |
| 2026-08-04 12:00 |
20:19:16.79 |
+46:46:00.7 |
HIP 100250 |
7.94 |
| 2026-08-05 00:00 |
20:19:15.10 |
+46:45:56.5 |
HIP 100250 |
8.22 |
| 2026-08-05 12:00 |
20:19:13.42 |
+46:45:52.0 |
HIP 100250 |
8.50 |
| 2026-08-06 00:00 |
20:19:11.73 |
+46:45:47.5 |
HIP 100250 |
8.79 |
| 2026-08-06 12:00 |
20:19:10.05 |
+46:45:42.8 |
HIP 100250 |
9.08 |
| 2026-08-07 00:00 |
20:19:08.37 |
+46:45:37.9 |
HIP 100250 |
9.37 |
| 2026-08-07 12:00 |
20:19:06.69 |
+46:45:32.9 |
HIP 100250 |
9.66 |
| 2026-08-08 00:00 |
20:19:05.02 |
+46:45:27.8 |
HIP 100250 |
9.95 |
| 2026-08-08 12:00 |
20:19:03.35 |
+46:45:22.6 |
HIP 100250 |
10.25 |
| 2026-08-09 00:00 |
20:19:01.69 |
+46:45:17.2 |
HIP 100250 |
10.54 |
| 2026-08-09 12:00 |
20:19:00.02 |
+46:45:11.7 |
HIP 100250 |
10.83 |
| 2026-08-10 00:00 |
20:18:58.36 |
+46:45:06.0 |
HIP 100250 |
11.13 |
| 2026-08-10 12:00 |
20:18:56.71 |
+46:45:00.3 |
HIP 100250 |
11.42 |
| 2026-08-11 00:00 |
20:18:55.06 |
+46:44:54.3 |
HIP 100250 |
11.72 |
| 2026-08-11 12:00 |
20:18:53.41 |
+46:44:48.3 |
HIP 100250 |
12.02 |
| 2026-08-12 00:00 |
20:18:51.77 |
+46:44:42.1 |
HIP 100131 |
12.15 |
| 2026-08-12 12:00 |
20:18:50.13 |
+46:44:35.8 |
HIP 100131 |
12.02 |
| 2026-08-13 00:00 |
20:18:48.49 |
+46:44:29.4 |
HIP 100131 |
11.89 |
| 2026-08-13 12:00 |
20:18:46.86 |
+46:44:22.8 |
HIP 100131 |
11.77 |
| 2026-08-14 00:00 |
20:18:45.23 |
+46:44:16.1 |
HIP 100131 |
11.65 |
| 2026-08-14 12:00 |
20:18:43.61 |
+46:44:09.2 |
HIP 100131 |
11.54 |
| 2026-08-15 00:00 |
20:18:42.00 |
+46:44:02.3 |
HIP 100131 |
11.43 |
| 2026-08-15 12:00 |
20:18:40.39 |
+46:43:55.2 |
HIP 100131 |
11.33 |
| 2026-08-16 00:00 |
20:18:38.78 |
+46:43:48.0 |
HIP 100131 |
11.23 |
| 2026-08-16 12:00 |
20:18:37.18 |
+46:43:40.6 |
HIP 100131 |
11.14 |
| 2026-08-17 00:00 |
20:18:35.58 |
+46:43:33.1 |
HIP 100131 |
11.05 |
| 2026-08-17 12:00 |
20:18:33.99 |
+46:43:25.5 |
HIP 100131 |
10.97 |
| 2026-08-18 00:00 |
20:18:32.41 |
+46:43:17.8 |
HIP 100131 |
10.90 |
| 2026-08-18 12:00 |
20:18:30.83 |
+46:43:10.0 |
HIP 100131 |
10.82 |
| 2026-08-19 00:00 |
20:18:29.26 |
+46:43:02.0 |
HIP 100131 |
10.76 |