C/1952 W1 (Mrkos)
| 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) |
| 2026-02-03 00:00 |
20:20:32.05 |
+45:43:02.0 |
HIP 100437 |
16.93 |
| 2026-02-03 12:00 |
20:20:33.71 |
+45:43:07.0 |
HIP 100437 |
16.63 |
| 2026-02-04 00:00 |
20:20:35.37 |
+45:43:12.1 |
HIP 100437 |
16.32 |
| 2026-02-04 12:00 |
20:20:37.02 |
+45:43:17.4 |
HIP 100437 |
16.02 |
| 2026-02-05 00:00 |
20:20:38.67 |
+45:43:22.8 |
HIP 100437 |
15.72 |
| 2026-02-05 12:00 |
20:20:40.32 |
+45:43:28.4 |
HIP 100437 |
15.42 |
| 2026-02-06 00:00 |
20:20:41.96 |
+45:43:34.1 |
HIP 100437 |
15.12 |
| 2026-02-06 12:00 |
20:20:43.60 |
+45:43:39.9 |
HIP 100437 |
14.81 |
| 2026-02-07 00:00 |
20:20:45.24 |
+45:43:45.9 |
HIP 100437 |
14.51 |
| 2026-02-07 12:00 |
20:20:46.87 |
+45:43:52.0 |
HIP 100437 |
14.21 |
| 2026-02-08 00:00 |
20:20:48.50 |
+45:43:58.2 |
HIP 100437 |
13.91 |
| 2026-02-08 12:00 |
20:20:50.13 |
+45:44:04.6 |
HIP 100437 |
13.61 |
| 2026-02-09 00:00 |
20:20:51.75 |
+45:44:11.1 |
HIP 100437 |
13.31 |
| 2026-02-09 12:00 |
20:20:53.37 |
+45:44:17.7 |
HIP 100437 |
13.00 |
| 2026-02-10 00:00 |
20:20:54.98 |
+45:44:24.5 |
HIP 100437 |
12.70 |
| 2026-02-10 12:00 |
20:20:56.59 |
+45:44:31.4 |
HIP 100437 |
12.40 |
| 2026-02-11 00:00 |
20:20:58.19 |
+45:44:38.4 |
HIP 100437 |
12.10 |
| 2026-02-11 12:00 |
20:20:59.79 |
+45:44:45.6 |
HIP 100437 |
11.80 |
| 2026-02-12 00:00 |
20:21:01.38 |
+45:44:52.9 |
HIP 100437 |
11.50 |
| 2026-02-12 12:00 |
20:21:02.97 |
+45:45:00.3 |
HIP 100437 |
11.20 |
| 2026-02-13 00:00 |
20:21:04.56 |
+45:45:07.9 |
HIP 100437 |
10.91 |
| 2026-02-13 12:00 |
20:21:06.14 |
+45:45:15.6 |
HIP 100437 |
10.61 |
| 2026-02-14 00:00 |
20:21:07.71 |
+45:45:23.4 |
HIP 100437 |
10.31 |
| 2026-02-14 12:00 |
20:21:09.28 |
+45:45:31.3 |
HIP 100437 |
10.01 |
| 2026-02-15 00:00 |
20:21:10.84 |
+45:45:39.4 |
HIP 100437 |
9.72 |
| 2026-02-15 12:00 |
20:21:12.40 |
+45:45:47.6 |
HIP 100437 |
9.43 |
| 2026-02-16 00:00 |
20:21:13.95 |
+45:45:55.9 |
HIP 100437 |
9.13 |
| 2026-02-16 12:00 |
20:21:15.49 |
+45:46:04.3 |
HIP 100437 |
8.84 |
| 2026-02-17 00:00 |
20:21:17.03 |
+45:46:12.9 |
HIP 100437 |
8.55 |
| 2026-02-17 12:00 |
20:21:18.56 |
+45:46:21.6 |
HIP 100437 |
8.26 |
| 2026-02-18 00:00 |
20:21:20.09 |
+45:46:30.4 |
HIP 100437 |
7.98 |
| 2026-02-18 12:00 |
20:21:21.61 |
+45:46:39.3 |
HIP 100437 |
7.70 |
| 2026-02-19 00:00 |
20:21:23.12 |
+45:46:48.4 |
HIP 100437 |
7.41 |
| 2026-02-19 12:00 |
20:21:24.63 |
+45:46:57.6 |
HIP 100437 |
7.14 |
| 2026-02-20 00:00 |
20:21:26.13 |
+45:47:06.9 |
HIP 100437 |
6.86 |
| 2026-02-20 12:00 |
20:21:27.62 |
+45:47:16.3 |
HIP 100437 |
6.59 |
| 2026-02-21 00:00 |
20:21:29.11 |
+45:47:25.8 |
HIP 100437 |
6.32 |
| 2026-02-21 12:00 |
20:21:30.59 |
+45:47:35.5 |
HIP 100437 |
6.06 |
| 2026-02-22 00:00 |
20:21:32.06 |
+45:47:45.2 |
HIP 100437 |
5.80 |
| 2026-02-22 12:00 |
20:21:33.52 |
+45:47:55.1 |
HIP 100437 |
5.55 |
| 2026-02-23 00:00 |
20:21:34.98 |
+45:48:05.1 |
HIP 100437 |
5.31 |
| 2026-02-23 12:00 |
20:21:36.43 |
+45:48:15.3 |
HIP 100437 |
5.07 |
| 2026-02-24 00:00 |
20:21:37.87 |
+45:48:25.5 |
HIP 100437 |
4.84 |