| Parameter |
Value |
| Designation |
C/1976 U1 (Lovas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1976-07-06T14:19:56.015040Z |
| Orbit solution date (soln_date, UTC) |
2023-08-28T01:42:39Z |
| Obs used |
34 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
9.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1977-02-05.0000000 |
| e |
1.00366837 |
| q (au) |
5.857482 |
| a (au) |
-1596.751644 |
| i (deg) |
86.628655 |
| Ω (om, deg) |
286.041394 |
| ω (w, deg) |
118.810853 |
| M (ma, deg) |
0.003296 |
Magnitude
Scatter + Global Linear
$$
M_a = (5.909 + 3.387\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
5.909 |
| n |
3.387 |
| gf |
0.994 |
| gb |
-0.998 |
| 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) |
| 2026-05-12 00:00 |
06:33:34.84 |
-62:16:25.2 |
HIP 31438 |
17.91 |
| 2026-05-12 12:00 |
06:33:37.23 |
-62:16:08.3 |
HIP 31438 |
17.95 |
| 2026-05-13 00:00 |
06:33:39.64 |
-62:15:51.5 |
HIP 31438 |
18.00 |
| 2026-05-13 12:00 |
06:33:42.08 |
-62:15:34.9 |
HIP 31438 |
18.06 |
| 2026-05-14 00:00 |
06:33:44.53 |
-62:15:18.5 |
HIP 31438 |
18.11 |
| 2026-05-14 12:00 |
06:33:47.01 |
-62:15:02.1 |
HIP 31438 |
18.18 |
| 2026-05-15 00:00 |
06:33:49.51 |
-62:14:46.0 |
HIP 31438 |
18.25 |
| 2026-05-15 12:00 |
06:33:52.02 |
-62:14:30.0 |
HIP 31438 |
18.32 |
| 2026-05-16 00:00 |
06:33:54.56 |
-62:14:14.1 |
HIP 31438 |
18.40 |
| 2026-05-16 12:00 |
06:33:57.12 |
-62:13:58.4 |
HIP 31438 |
18.48 |
| 2026-05-17 00:00 |
06:33:59.69 |
-62:13:42.9 |
HIP 31438 |
18.57 |
| 2026-05-17 12:00 |
06:34:02.29 |
-62:13:27.5 |
HIP 31438 |
18.66 |
| 2026-05-18 00:00 |
06:34:04.90 |
-62:13:12.3 |
HIP 31438 |
18.75 |
| 2026-05-18 12:00 |
06:34:07.54 |
-62:12:57.2 |
HIP 31438 |
18.86 |
| 2026-05-19 00:00 |
06:34:10.19 |
-62:12:42.3 |
HIP 31438 |
18.96 |
| 2026-05-19 12:00 |
06:34:12.86 |
-62:12:27.5 |
HIP 31438 |
19.07 |
| 2026-05-20 00:00 |
06:34:15.55 |
-62:12:12.9 |
HIP 31438 |
19.18 |
| 2026-05-20 12:00 |
06:34:18.26 |
-62:11:58.5 |
HIP 31438 |
19.30 |
| 2026-05-21 00:00 |
06:34:20.98 |
-62:11:44.2 |
HIP 31438 |
19.42 |
| 2026-05-21 12:00 |
06:34:23.73 |
-62:11:30.1 |
HIP 31438 |
19.55 |
| 2026-05-22 00:00 |
06:34:26.49 |
-62:11:16.2 |
HIP 31438 |
19.68 |
| 2026-05-22 12:00 |
06:34:29.27 |
-62:11:02.4 |
HIP 31438 |
19.81 |
| 2026-05-23 00:00 |
06:34:32.06 |
-62:10:48.8 |
HIP 31438 |
19.95 |
| 2026-05-23 12:00 |
06:34:34.87 |
-62:10:35.3 |
HIP 31438 |
20.09 |
| 2026-05-24 00:00 |
06:34:37.70 |
-62:10:22.1 |
HIP 31438 |
20.24 |
| 2026-05-24 12:00 |
06:34:40.55 |
-62:10:09.0 |
HIP 31438 |
20.39 |
| 2026-05-25 00:00 |
06:34:43.41 |
-62:09:56.0 |
HIP 31438 |
20.54 |
| 2026-05-25 12:00 |
06:34:46.28 |
-62:09:43.3 |
HIP 31438 |
20.69 |
| 2026-05-26 00:00 |
06:34:49.18 |
-62:09:30.7 |
HIP 31438 |
20.85 |
| 2026-05-26 12:00 |
06:34:52.09 |
-62:09:18.3 |
HIP 31438 |
21.01 |
| 2026-05-27 00:00 |
06:34:55.01 |
-62:09:06.0 |
HIP 31438 |
21.18 |
| 2026-05-27 12:00 |
06:34:57.95 |
-62:08:54.0 |
HIP 31438 |
21.34 |
| 2026-05-28 00:00 |
06:35:00.90 |
-62:08:42.1 |
HIP 31438 |
21.51 |
| 2026-05-28 12:00 |
06:35:03.87 |
-62:08:30.3 |
HIP 31438 |
21.69 |
| 2026-05-29 00:00 |
06:35:06.85 |
-62:08:18.8 |
HIP 31438 |
21.86 |
| 2026-05-29 12:00 |
06:35:09.85 |
-62:08:07.4 |
HIP 31438 |
22.04 |
| 2026-05-30 00:00 |
06:35:12.86 |
-62:07:56.2 |
HIP 31438 |
22.22 |
| 2026-05-30 12:00 |
06:35:15.89 |
-62:07:45.2 |
HIP 31438 |
22.41 |
| 2026-05-31 00:00 |
06:35:18.93 |
-62:07:34.4 |
HIP 31438 |
22.60 |
| 2026-05-31 12:00 |
06:35:21.98 |
-62:07:23.7 |
HIP 31438 |
22.79 |
| 2026-06-01 00:00 |
06:35:25.05 |
-62:07:13.3 |
HIP 31438 |
22.98 |
| 2026-06-01 12:00 |
06:35:28.13 |
-62:07:03.0 |
HIP 31438 |
23.17 |
| 2026-06-02 00:00 |
06:35:31.22 |
-62:06:52.9 |
HIP 31438 |
23.37 |