| Parameter |
Value |
| Designation |
C/1954 O1 (Vozarova) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1954-06-01T22:01:56.046720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
4 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1954-11-09.0000000 |
| e |
1.07365063 |
| q (au) |
0.781184 |
| a (au) |
-10.606611 |
| i (deg) |
115.183591 |
| Ω (om, deg) |
123.985753 |
| ω (w, deg) |
5.108240 |
| M (ma, deg) |
4.567532 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.780 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.780 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-07-29 00:00 |
20:39:22.34 |
-01:51:01.2 |
HIP 101921 |
33.84 |
| 2026-07-29 12:00 |
20:39:21.66 |
-01:51:03.8 |
HIP 101921 |
33.78 |
| 2026-07-30 00:00 |
20:39:20.97 |
-01:51:06.4 |
HIP 101921 |
33.73 |
| 2026-07-30 12:00 |
20:39:20.28 |
-01:51:09.1 |
HIP 101921 |
33.67 |
| 2026-07-31 00:00 |
20:39:19.59 |
-01:51:11.8 |
HIP 101921 |
33.62 |
| 2026-07-31 12:00 |
20:39:18.91 |
-01:51:14.5 |
HIP 101921 |
33.57 |
| 2026-08-01 00:00 |
20:39:18.22 |
-01:51:17.3 |
HIP 101921 |
33.51 |
| 2026-08-01 12:00 |
20:39:17.53 |
-01:51:20.0 |
HIP 101921 |
33.46 |
| 2026-08-02 00:00 |
20:39:16.85 |
-01:51:22.8 |
HIP 101921 |
33.41 |
| 2026-08-02 12:00 |
20:39:16.16 |
-01:51:25.7 |
HIP 101921 |
33.36 |
| 2026-08-03 00:00 |
20:39:15.47 |
-01:51:28.5 |
HIP 101921 |
33.31 |
| 2026-08-03 12:00 |
20:39:14.79 |
-01:51:31.4 |
HIP 101921 |
33.26 |
| 2026-08-04 00:00 |
20:39:14.10 |
-01:51:34.3 |
HIP 101921 |
33.21 |
| 2026-08-04 12:00 |
20:39:13.42 |
-01:51:37.2 |
HIP 101921 |
33.16 |
| 2026-08-05 00:00 |
20:39:12.73 |
-01:51:40.1 |
HIP 101921 |
33.11 |
| 2026-08-05 12:00 |
20:39:12.05 |
-01:51:43.1 |
HIP 101921 |
33.06 |
| 2026-08-06 00:00 |
20:39:11.36 |
-01:51:46.1 |
HIP 101921 |
33.01 |
| 2026-08-06 12:00 |
20:39:10.68 |
-01:51:49.1 |
HIP 101921 |
32.97 |
| 2026-08-07 00:00 |
20:39:10.00 |
-01:51:52.1 |
HIP 101921 |
32.92 |
| 2026-08-07 12:00 |
20:39:09.32 |
-01:51:55.2 |
HIP 101921 |
32.87 |
| 2026-08-08 00:00 |
20:39:08.64 |
-01:51:58.3 |
HIP 101921 |
32.83 |
| 2026-08-08 12:00 |
20:39:07.96 |
-01:52:01.4 |
HIP 101921 |
32.78 |
| 2026-08-09 00:00 |
20:39:07.28 |
-01:52:04.5 |
HIP 101921 |
32.74 |
| 2026-08-09 12:00 |
20:39:06.60 |
-01:52:07.6 |
HIP 101921 |
32.69 |
| 2026-08-10 00:00 |
20:39:05.92 |
-01:52:10.8 |
HIP 101921 |
32.65 |
| 2026-08-10 12:00 |
20:39:05.24 |
-01:52:14.0 |
HIP 101921 |
32.61 |
| 2026-08-11 00:00 |
20:39:04.57 |
-01:52:17.2 |
HIP 101921 |
32.56 |
| 2026-08-11 12:00 |
20:39:03.89 |
-01:52:20.4 |
HIP 101921 |
32.52 |
| 2026-08-12 00:00 |
20:39:03.22 |
-01:52:23.7 |
HIP 101921 |
32.48 |
| 2026-08-12 12:00 |
20:39:02.55 |
-01:52:27.0 |
HIP 101921 |
32.44 |
| 2026-08-13 00:00 |
20:39:01.88 |
-01:52:30.3 |
HIP 101921 |
32.40 |
| 2026-08-13 12:00 |
20:39:01.21 |
-01:52:33.6 |
HIP 101921 |
32.36 |
| 2026-08-14 00:00 |
20:39:00.54 |
-01:52:36.9 |
HIP 101921 |
32.32 |
| 2026-08-14 12:00 |
20:38:59.87 |
-01:52:40.3 |
HIP 101921 |
32.28 |
| 2026-08-15 00:00 |
20:38:59.21 |
-01:52:43.7 |
HIP 101921 |
32.24 |
| 2026-08-15 12:00 |
20:38:58.54 |
-01:52:47.1 |
HIP 101921 |
32.20 |
| 2026-08-16 00:00 |
20:38:57.88 |
-01:52:50.5 |
HIP 101921 |
32.17 |
| 2026-08-16 12:00 |
20:38:57.22 |
-01:52:53.9 |
HIP 101921 |
32.13 |
| 2026-08-17 00:00 |
20:38:56.56 |
-01:52:57.4 |
HIP 101921 |
32.09 |
| 2026-08-17 12:00 |
20:38:55.90 |
-01:53:00.8 |
HIP 101921 |
32.06 |
| 2026-08-18 00:00 |
20:38:55.25 |
-01:53:04.3 |
HIP 101921 |
32.02 |
| 2026-08-18 12:00 |
20:38:54.59 |
-01:53:07.8 |
HIP 101921 |
31.99 |
| 2026-08-19 00:00 |
20:38:53.94 |
-01:53:11.4 |
HIP 101921 |
31.96 |