| Parameter |
Value |
| Designation |
C/1953 X1 (Pajdusakova) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1954-01-24T16:06:48.960000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
22 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1954-01-24.6714000 |
| e |
1.00000000 |
| q (au) |
0.072347 |
| a (au) |
- |
| i (deg) |
13.572900 |
| Ω (om, deg) |
115.232800 |
| ω (w, deg) |
94.077900 |
| M (ma, deg) |
- |
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) |
| 2026-07-29 00:00 |
01:59:09.18 |
-02:19:46.8 |
HIP 9155 |
22.89 |
| 2026-07-29 12:00 |
01:59:09.10 |
-02:19:51.7 |
HIP 9155 |
22.92 |
| 2026-07-30 00:00 |
01:59:09.02 |
-02:19:56.6 |
HIP 9155 |
22.95 |
| 2026-07-30 12:00 |
01:59:08.92 |
-02:20:01.6 |
HIP 9155 |
22.99 |
| 2026-07-31 00:00 |
01:59:08.81 |
-02:20:06.6 |
HIP 9155 |
23.02 |
| 2026-07-31 12:00 |
01:59:08.69 |
-02:20:11.7 |
HIP 9155 |
23.05 |
| 2026-08-01 00:00 |
01:59:08.57 |
-02:20:16.8 |
HIP 9155 |
23.07 |
| 2026-08-01 12:00 |
01:59:08.43 |
-02:20:22.0 |
HIP 9155 |
23.10 |
| 2026-08-02 00:00 |
01:59:08.28 |
-02:20:27.2 |
HIP 9155 |
23.13 |
| 2026-08-02 12:00 |
01:59:08.13 |
-02:20:32.5 |
HIP 9155 |
23.15 |
| 2026-08-03 00:00 |
01:59:07.96 |
-02:20:37.8 |
HIP 9155 |
23.18 |
| 2026-08-03 12:00 |
01:59:07.79 |
-02:20:43.2 |
HIP 9155 |
23.20 |
| 2026-08-04 00:00 |
01:59:07.61 |
-02:20:48.6 |
HIP 9155 |
23.22 |
| 2026-08-04 12:00 |
01:59:07.41 |
-02:20:54.0 |
HIP 9155 |
23.24 |
| 2026-08-05 00:00 |
01:59:07.21 |
-02:20:59.5 |
HIP 9155 |
23.26 |
| 2026-08-05 12:00 |
01:59:07.00 |
-02:21:05.1 |
HIP 9155 |
23.28 |
| 2026-08-06 00:00 |
01:59:06.78 |
-02:21:10.7 |
HIP 9155 |
23.30 |
| 2026-08-06 12:00 |
01:59:06.55 |
-02:21:16.3 |
HIP 9155 |
23.32 |
| 2026-08-07 00:00 |
01:59:06.31 |
-02:21:22.0 |
HIP 9155 |
23.34 |
| 2026-08-07 12:00 |
01:59:06.06 |
-02:21:27.7 |
HIP 9155 |
23.35 |
| 2026-08-08 00:00 |
01:59:05.80 |
-02:21:33.4 |
HIP 9155 |
23.37 |
| 2026-08-08 12:00 |
01:59:05.53 |
-02:21:39.2 |
HIP 9155 |
23.38 |
| 2026-08-09 00:00 |
01:59:05.26 |
-02:21:45.1 |
HIP 9155 |
23.40 |
| 2026-08-09 12:00 |
01:59:04.97 |
-02:21:50.9 |
HIP 9155 |
23.41 |
| 2026-08-10 00:00 |
01:59:04.68 |
-02:21:56.9 |
HIP 9155 |
23.42 |
| 2026-08-10 12:00 |
01:59:04.37 |
-02:22:02.8 |
HIP 9155 |
23.44 |
| 2026-08-11 00:00 |
01:59:04.06 |
-02:22:08.8 |
HIP 9155 |
23.45 |
| 2026-08-11 12:00 |
01:59:03.73 |
-02:22:14.9 |
HIP 9155 |
23.46 |
| 2026-08-12 00:00 |
01:59:03.40 |
-02:22:21.0 |
HIP 9155 |
23.47 |
| 2026-08-12 12:00 |
01:59:03.06 |
-02:22:27.1 |
HIP 9155 |
23.48 |
| 2026-08-13 00:00 |
01:59:02.71 |
-02:22:33.2 |
HIP 9155 |
23.49 |
| 2026-08-13 12:00 |
01:59:02.34 |
-02:22:39.4 |
HIP 9155 |
23.50 |
| 2026-08-14 00:00 |
01:59:01.97 |
-02:22:45.7 |
HIP 9155 |
23.51 |
| 2026-08-14 12:00 |
01:59:01.60 |
-02:22:51.9 |
HIP 9155 |
23.52 |
| 2026-08-15 00:00 |
01:59:01.21 |
-02:22:58.2 |
HIP 9155 |
23.53 |
| 2026-08-15 12:00 |
01:59:00.81 |
-02:23:04.6 |
HIP 9155 |
23.54 |
| 2026-08-16 00:00 |
01:59:00.40 |
-02:23:11.0 |
HIP 9155 |
23.54 |
| 2026-08-16 12:00 |
01:58:59.99 |
-02:23:17.4 |
HIP 9155 |
23.55 |
| 2026-08-17 00:00 |
01:58:59.56 |
-02:23:23.8 |
HIP 9155 |
23.56 |
| 2026-08-17 12:00 |
01:58:59.13 |
-02:23:30.3 |
HIP 9155 |
23.57 |
| 2026-08-18 00:00 |
01:58:58.69 |
-02:23:36.8 |
HIP 9155 |
23.57 |
| 2026-08-18 12:00 |
01:58:58.24 |
-02:23:43.4 |
HIP 9155 |
23.58 |
| 2026-08-19 00:00 |
01:58:57.78 |
-02:23:49.9 |
HIP 9155 |
23.59 |