| Parameter |
Value |
| Designation |
C/1953 X1 (Pajdusakova) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1954-01-24T16:04:30.538560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
8 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1953-12-12.0000000 |
| e |
0.99999670 |
| q (au) |
0.072306 |
| a (au) |
21896.357847 |
| i (deg) |
13.570931 |
| Ω (om, deg) |
115.246250 |
| ω (w, deg) |
94.072943 |
| M (ma, deg) |
359.999987 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
01:58:18.07 |
-02:16:47.8 |
HIP 9155 |
12.14 |
| 2026-06-01 12:00 |
01:58:18.95 |
-02:16:45.8 |
HIP 9155 |
12.21 |
| 2026-06-02 00:00 |
01:58:19.82 |
-02:16:43.9 |
HIP 9155 |
12.29 |
| 2026-06-02 12:00 |
01:58:20.69 |
-02:16:42.0 |
HIP 9155 |
12.37 |
| 2026-06-03 00:00 |
01:58:21.56 |
-02:16:40.2 |
HIP 9155 |
12.45 |
| 2026-06-03 12:00 |
01:58:22.41 |
-02:16:38.5 |
HIP 9155 |
12.54 |
| 2026-06-04 00:00 |
01:58:23.26 |
-02:16:36.8 |
HIP 9155 |
12.62 |
| 2026-06-04 12:00 |
01:58:24.11 |
-02:16:35.2 |
HIP 9155 |
12.72 |
| 2026-06-05 00:00 |
01:58:24.95 |
-02:16:33.6 |
HIP 9155 |
12.81 |
| 2026-06-05 12:00 |
01:58:25.78 |
-02:16:32.2 |
HIP 9155 |
12.91 |
| 2026-06-06 00:00 |
01:58:26.60 |
-02:16:30.7 |
HIP 9155 |
13.01 |
| 2026-06-06 12:00 |
01:58:27.42 |
-02:16:29.4 |
HIP 9155 |
13.11 |
| 2026-06-07 00:00 |
01:58:28.24 |
-02:16:28.0 |
HIP 9155 |
13.22 |
| 2026-06-07 12:00 |
01:58:29.04 |
-02:16:26.8 |
HIP 9155 |
13.32 |
| 2026-06-08 00:00 |
01:58:29.84 |
-02:16:25.6 |
HIP 9155 |
13.43 |
| 2026-06-08 12:00 |
01:58:30.64 |
-02:16:24.5 |
HIP 9155 |
13.54 |
| 2026-06-09 00:00 |
01:58:31.42 |
-02:16:23.4 |
HIP 9155 |
13.65 |
| 2026-06-09 12:00 |
01:58:32.20 |
-02:16:22.4 |
HIP 9155 |
13.77 |
| 2026-06-10 00:00 |
01:58:32.98 |
-02:16:21.5 |
HIP 9155 |
13.88 |
| 2026-06-10 12:00 |
01:58:33.74 |
-02:16:20.6 |
HIP 9155 |
14.00 |
| 2026-06-11 00:00 |
01:58:34.50 |
-02:16:19.8 |
HIP 9155 |
14.12 |
| 2026-06-11 12:00 |
01:58:35.25 |
-02:16:19.1 |
HIP 9155 |
14.24 |
| 2026-06-12 00:00 |
01:58:36.00 |
-02:16:18.4 |
HIP 9155 |
14.36 |
| 2026-06-12 12:00 |
01:58:36.74 |
-02:16:17.8 |
HIP 9155 |
14.48 |
| 2026-06-13 00:00 |
01:58:37.47 |
-02:16:17.2 |
HIP 9155 |
14.60 |
| 2026-06-13 12:00 |
01:58:38.19 |
-02:16:16.7 |
HIP 9155 |
14.72 |
| 2026-06-14 00:00 |
01:58:38.91 |
-02:16:16.3 |
HIP 9155 |
14.85 |
| 2026-06-14 12:00 |
01:58:39.62 |
-02:16:15.9 |
HIP 9155 |
14.97 |
| 2026-06-15 00:00 |
01:58:40.32 |
-02:16:15.6 |
HIP 9155 |
15.10 |
| 2026-06-15 12:00 |
01:58:41.02 |
-02:16:15.3 |
HIP 9155 |
15.22 |
| 2026-06-16 00:00 |
01:58:41.71 |
-02:16:15.2 |
HIP 9155 |
15.35 |
| 2026-06-16 12:00 |
01:58:42.39 |
-02:16:15.1 |
HIP 9155 |
15.47 |
| 2026-06-17 00:00 |
01:58:43.06 |
-02:16:15.0 |
HIP 9155 |
15.60 |
| 2026-06-17 12:00 |
01:58:43.73 |
-02:16:15.0 |
HIP 9155 |
15.72 |
| 2026-06-18 00:00 |
01:58:44.38 |
-02:16:15.1 |
HIP 9155 |
15.85 |
| 2026-06-18 12:00 |
01:58:45.03 |
-02:16:15.2 |
HIP 9155 |
15.97 |
| 2026-06-19 00:00 |
01:58:45.68 |
-02:16:15.4 |
HIP 9155 |
16.10 |
| 2026-06-19 12:00 |
01:58:46.31 |
-02:16:15.7 |
HIP 9155 |
16.22 |
| 2026-06-20 00:00 |
01:58:46.94 |
-02:16:16.0 |
HIP 9155 |
16.35 |
| 2026-06-20 12:00 |
01:58:47.56 |
-02:16:16.4 |
HIP 9155 |
16.47 |
| 2026-06-21 00:00 |
01:58:48.17 |
-02:16:16.8 |
HIP 9155 |
16.60 |
| 2026-06-21 12:00 |
01:58:48.77 |
-02:16:17.4 |
HIP 9155 |
16.72 |
| 2026-06-22 00:00 |
01:58:49.37 |
-02:16:17.9 |
HIP 9155 |
16.84 |