| 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) |
| 2026-05-12 00:00 |
01:57:38.78 |
-02:18:54.8 |
HIP 9155 |
13.66 |
| 2026-05-12 12:00 |
01:57:39.84 |
-02:18:50.6 |
HIP 9155 |
13.51 |
| 2026-05-13 00:00 |
01:57:40.90 |
-02:18:46.3 |
HIP 9155 |
13.36 |
| 2026-05-13 12:00 |
01:57:41.95 |
-02:18:42.2 |
HIP 9155 |
13.22 |
| 2026-05-14 00:00 |
01:57:43.00 |
-02:18:38.1 |
HIP 9155 |
13.09 |
| 2026-05-14 12:00 |
01:57:44.05 |
-02:18:34.0 |
HIP 9155 |
12.96 |
| 2026-05-15 00:00 |
01:57:45.10 |
-02:18:30.0 |
HIP 9155 |
12.84 |
| 2026-05-15 12:00 |
01:57:46.14 |
-02:18:26.1 |
HIP 9155 |
12.72 |
| 2026-05-16 00:00 |
01:57:47.18 |
-02:18:22.2 |
HIP 9155 |
12.61 |
| 2026-05-16 12:00 |
01:57:48.22 |
-02:18:18.4 |
HIP 9155 |
12.50 |
| 2026-05-17 00:00 |
01:57:49.25 |
-02:18:14.6 |
HIP 9155 |
12.40 |
| 2026-05-17 12:00 |
01:57:50.27 |
-02:18:10.8 |
HIP 9155 |
12.31 |
| 2026-05-18 00:00 |
01:57:51.30 |
-02:18:07.2 |
HIP 9155 |
12.22 |
| 2026-05-18 12:00 |
01:57:52.32 |
-02:18:03.6 |
HIP 9155 |
12.14 |
| 2026-05-19 00:00 |
01:57:53.33 |
-02:18:00.0 |
HIP 9155 |
12.06 |
| 2026-05-19 12:00 |
01:57:54.34 |
-02:17:56.5 |
HIP 9155 |
11.99 |
| 2026-05-20 00:00 |
01:57:55.35 |
-02:17:53.1 |
HIP 9155 |
11.92 |
| 2026-05-20 12:00 |
01:57:56.35 |
-02:17:49.7 |
HIP 9155 |
11.87 |
| 2026-05-21 00:00 |
01:57:57.35 |
-02:17:46.3 |
HIP 9155 |
11.81 |
| 2026-05-21 12:00 |
01:57:58.34 |
-02:17:43.1 |
HIP 9155 |
11.77 |
| 2026-05-22 00:00 |
01:57:59.33 |
-02:17:39.9 |
HIP 9155 |
11.73 |
| 2026-05-22 12:00 |
01:58:00.32 |
-02:17:36.7 |
HIP 9155 |
11.70 |
| 2026-05-23 00:00 |
01:58:01.30 |
-02:17:33.6 |
HIP 9155 |
11.67 |
| 2026-05-23 12:00 |
01:58:02.27 |
-02:17:30.5 |
HIP 9155 |
11.65 |
| 2026-05-24 00:00 |
01:58:03.24 |
-02:17:27.6 |
HIP 9155 |
11.63 |
| 2026-05-24 12:00 |
01:58:04.21 |
-02:17:24.6 |
HIP 9155 |
11.62 |
| 2026-05-25 00:00 |
01:58:05.17 |
-02:17:21.8 |
HIP 9155 |
11.62 |
| 2026-05-25 12:00 |
01:58:06.12 |
-02:17:19.0 |
HIP 9155 |
11.62 |
| 2026-05-26 00:00 |
01:58:07.07 |
-02:17:16.2 |
HIP 9155 |
11.63 |
| 2026-05-26 12:00 |
01:58:08.02 |
-02:17:13.5 |
HIP 9155 |
11.65 |
| 2026-05-27 00:00 |
01:58:08.96 |
-02:17:10.9 |
HIP 9155 |
11.67 |
| 2026-05-27 12:00 |
01:58:09.90 |
-02:17:08.3 |
HIP 9155 |
11.69 |
| 2026-05-28 00:00 |
01:58:10.83 |
-02:17:05.8 |
HIP 9155 |
11.72 |
| 2026-05-28 12:00 |
01:58:11.75 |
-02:17:03.3 |
HIP 9155 |
11.76 |
| 2026-05-29 00:00 |
01:58:12.67 |
-02:17:00.9 |
HIP 9155 |
11.80 |
| 2026-05-29 12:00 |
01:58:13.58 |
-02:16:58.6 |
HIP 9155 |
11.85 |
| 2026-05-30 00:00 |
01:58:14.49 |
-02:16:56.3 |
HIP 9155 |
11.90 |
| 2026-05-30 12:00 |
01:58:15.40 |
-02:16:54.1 |
HIP 9155 |
11.95 |
| 2026-05-31 00:00 |
01:58:16.29 |
-02:16:51.9 |
HIP 9155 |
12.01 |
| 2026-05-31 12:00 |
01:58:17.18 |
-02:16:49.8 |
HIP 9155 |
12.07 |
| 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 |