| Parameter |
Value |
| Designation |
C/1948 E1 (Pajdusakova-Mrkos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1948-05-16T15:18:31.078080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
12 |
| NEO |
- |
| M1 |
5.300 |
| K1 |
12.250 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1949-03-06.0000000 |
| e |
1.00093013 |
| q (au) |
2.107136 |
| a (au) |
-2265.428601 |
| i (deg) |
92.917661 |
| Ω (om, deg) |
247.655064 |
| ω (w, deg) |
66.906940 |
| M (ma, deg) |
0.002682 |
Magnitude
Scatter + Global Linear
$$
M_a = (2.842 + 5.735\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
2.842 |
| n |
5.735 |
| gf |
0.999 |
| gb |
-0.682 |
| k |
0.981 |
| δ90 |
9.995 |
| 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) |
| 2026-06-01 00:00 |
04:45:56.73 |
-27:53:07.4 |
HIP 22192 |
13.71 |
| 2026-06-01 12:00 |
04:45:58.02 |
-27:53:05.7 |
HIP 22192 |
13.61 |
| 2026-06-02 00:00 |
04:45:59.32 |
-27:53:04.1 |
HIP 22192 |
13.51 |
| 2026-06-02 12:00 |
04:46:00.61 |
-27:53:02.6 |
HIP 22192 |
13.41 |
| 2026-06-03 00:00 |
04:46:01.91 |
-27:53:01.2 |
HIP 22192 |
13.31 |
| 2026-06-03 12:00 |
04:46:03.21 |
-27:52:59.9 |
HIP 22192 |
13.22 |
| 2026-06-04 00:00 |
04:46:04.50 |
-27:52:58.7 |
HIP 22192 |
13.14 |
| 2026-06-04 12:00 |
04:46:05.80 |
-27:52:57.7 |
HIP 22192 |
13.05 |
| 2026-06-05 00:00 |
04:46:07.09 |
-27:52:56.7 |
HIP 22192 |
12.98 |
| 2026-06-05 12:00 |
04:46:08.39 |
-27:52:55.9 |
HIP 22192 |
12.90 |
| 2026-06-06 00:00 |
04:46:09.68 |
-27:52:55.2 |
HIP 22192 |
12.83 |
| 2026-06-06 12:00 |
04:46:10.98 |
-27:52:54.6 |
HIP 22192 |
12.76 |
| 2026-06-07 00:00 |
04:46:12.27 |
-27:52:54.1 |
HIP 22192 |
12.70 |
| 2026-06-07 12:00 |
04:46:13.57 |
-27:52:53.7 |
HIP 22192 |
12.64 |
| 2026-06-08 00:00 |
04:46:14.86 |
-27:52:53.4 |
HIP 22192 |
12.59 |
| 2026-06-08 12:00 |
04:46:16.15 |
-27:52:53.3 |
HIP 22192 |
12.54 |
| 2026-06-09 00:00 |
04:46:17.44 |
-27:52:53.2 |
HIP 22192 |
12.50 |
| 2026-06-09 12:00 |
04:46:18.73 |
-27:52:53.3 |
HIP 22192 |
12.46 |
| 2026-06-10 00:00 |
04:46:20.02 |
-27:52:53.5 |
HIP 22192 |
12.42 |
| 2026-06-10 12:00 |
04:46:21.31 |
-27:52:53.8 |
HIP 22192 |
12.39 |
| 2026-06-11 00:00 |
04:46:22.60 |
-27:52:54.2 |
HIP 22192 |
12.37 |
| 2026-06-11 12:00 |
04:46:23.89 |
-27:52:54.7 |
HIP 22192 |
12.34 |
| 2026-06-12 00:00 |
04:46:25.17 |
-27:52:55.3 |
HIP 22192 |
12.33 |
| 2026-06-12 12:00 |
04:46:26.46 |
-27:52:56.0 |
HIP 22192 |
12.32 |
| 2026-06-13 00:00 |
04:46:27.74 |
-27:52:56.9 |
HIP 22192 |
12.31 |
| 2026-06-13 12:00 |
04:46:29.02 |
-27:52:57.9 |
HIP 22192 |
12.31 |
| 2026-06-14 00:00 |
04:46:30.30 |
-27:52:58.9 |
HIP 22192 |
12.31 |
| 2026-06-14 12:00 |
04:46:31.58 |
-27:53:00.1 |
HIP 22192 |
12.31 |
| 2026-06-15 00:00 |
04:46:32.85 |
-27:53:01.4 |
HIP 22192 |
12.33 |
| 2026-06-15 12:00 |
04:46:34.12 |
-27:53:02.9 |
HIP 22192 |
12.34 |
| 2026-06-16 00:00 |
04:46:35.40 |
-27:53:04.4 |
HIP 22192 |
12.36 |
| 2026-06-16 12:00 |
04:46:36.66 |
-27:53:06.0 |
HIP 22192 |
12.39 |
| 2026-06-17 00:00 |
04:46:37.93 |
-27:53:07.8 |
HIP 22192 |
12.41 |
| 2026-06-17 12:00 |
04:46:39.20 |
-27:53:09.7 |
HIP 22192 |
12.45 |
| 2026-06-18 00:00 |
04:46:40.46 |
-27:53:11.6 |
HIP 22192 |
12.48 |
| 2026-06-18 12:00 |
04:46:41.72 |
-27:53:13.7 |
HIP 22192 |
12.53 |
| 2026-06-19 00:00 |
04:46:42.97 |
-27:53:15.9 |
HIP 22192 |
12.57 |
| 2026-06-19 12:00 |
04:46:44.23 |
-27:53:18.2 |
HIP 22192 |
12.62 |
| 2026-06-20 00:00 |
04:46:45.48 |
-27:53:20.7 |
HIP 22192 |
12.68 |
| 2026-06-20 12:00 |
04:46:46.73 |
-27:53:23.2 |
HIP 22192 |
12.73 |
| 2026-06-21 00:00 |
04:46:47.97 |
-27:53:25.8 |
HIP 22192 |
12.80 |
| 2026-06-21 12:00 |
04:46:49.22 |
-27:53:28.6 |
HIP 22192 |
12.86 |
| 2026-06-22 00:00 |
04:46:50.46 |
-27:53:31.5 |
HIP 22192 |
12.93 |