| Parameter |
Value |
| Designation |
C/1974 F1 (Lovas) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1975-08-22T03:56:03.344640Z |
| Orbit solution date (soln_date, UTC) |
2023-08-28T01:42:36Z |
| Obs used |
137 |
| NEO |
- |
| M1 |
9.000 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1975-04-12.0000000 |
| e |
0.99979749 |
| q (au) |
3.011474 |
| a (au) |
14870.379859 |
| i (deg) |
50.648407 |
| Ω (om, deg) |
12.368086 |
| ω (w, deg) |
261.362838 |
| M (ma, deg) |
359.999928 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.432 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.432 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.727 |
| k |
0.999 |
| 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 |
02:42:40.59 |
+59:10:09.5 |
HIP 12572 |
13.84 |
| 2026-07-29 12:00 |
02:42:40.99 |
+59:10:26.8 |
HIP 12572 |
14.11 |
| 2026-07-30 00:00 |
02:42:41.37 |
+59:10:44.0 |
HIP 12572 |
14.37 |
| 2026-07-30 12:00 |
02:42:41.73 |
+59:11:01.3 |
HIP 12572 |
14.64 |
| 2026-07-31 00:00 |
02:42:42.06 |
+59:11:18.5 |
HIP 12572 |
14.91 |
| 2026-07-31 12:00 |
02:42:42.37 |
+59:11:35.7 |
HIP 12572 |
15.17 |
| 2026-08-01 00:00 |
02:42:42.65 |
+59:11:52.8 |
HIP 12572 |
15.43 |
| 2026-08-01 12:00 |
02:42:42.91 |
+59:12:10.0 |
HIP 12572 |
15.70 |
| 2026-08-02 00:00 |
02:42:43.15 |
+59:12:27.1 |
HIP 12572 |
15.96 |
| 2026-08-02 12:00 |
02:42:43.36 |
+59:12:44.1 |
HIP 12572 |
16.22 |
| 2026-08-03 00:00 |
02:42:43.54 |
+59:13:01.2 |
HIP 12572 |
16.47 |
| 2026-08-03 12:00 |
02:42:43.70 |
+59:13:18.2 |
HIP 12572 |
16.73 |
| 2026-08-04 00:00 |
02:42:43.84 |
+59:13:35.1 |
HIP 12572 |
16.99 |
| 2026-08-04 12:00 |
02:42:43.95 |
+59:13:52.1 |
HIP 12572 |
17.24 |
| 2026-08-05 00:00 |
02:42:44.04 |
+59:14:08.9 |
HIP 12572 |
17.50 |
| 2026-08-05 12:00 |
02:42:44.10 |
+59:14:25.8 |
HIP 12572 |
17.75 |
| 2026-08-06 00:00 |
02:42:44.14 |
+59:14:42.6 |
HIP 12572 |
18.00 |
| 2026-08-06 12:00 |
02:42:44.15 |
+59:14:59.4 |
HIP 12572 |
18.25 |
| 2026-08-07 00:00 |
02:42:44.14 |
+59:15:16.1 |
HIP 12572 |
18.50 |
| 2026-08-07 12:00 |
02:42:44.10 |
+59:15:32.8 |
HIP 12572 |
18.75 |
| 2026-08-08 00:00 |
02:42:44.04 |
+59:15:49.4 |
HIP 12572 |
19.00 |
| 2026-08-08 12:00 |
02:42:43.95 |
+59:16:06.0 |
HIP 12572 |
19.24 |
| 2026-08-09 00:00 |
02:42:43.84 |
+59:16:22.6 |
HIP 12572 |
19.49 |
| 2026-08-09 12:00 |
02:42:43.70 |
+59:16:39.1 |
HIP 12572 |
19.73 |
| 2026-08-10 00:00 |
02:42:43.54 |
+59:16:55.5 |
HIP 12572 |
19.97 |
| 2026-08-10 12:00 |
02:42:43.35 |
+59:17:11.9 |
HIP 12572 |
20.21 |
| 2026-08-11 00:00 |
02:42:43.14 |
+59:17:28.3 |
HIP 12572 |
20.45 |
| 2026-08-11 12:00 |
02:42:42.90 |
+59:17:44.6 |
HIP 12572 |
20.69 |
| 2026-08-12 00:00 |
02:42:42.64 |
+59:18:00.8 |
HIP 12572 |
20.93 |
| 2026-08-12 12:00 |
02:42:42.36 |
+59:18:17.0 |
HIP 12572 |
21.16 |
| 2026-08-13 00:00 |
02:42:42.04 |
+59:18:33.1 |
HIP 12572 |
21.40 |
| 2026-08-13 12:00 |
02:42:41.71 |
+59:18:49.2 |
HIP 12572 |
21.63 |
| 2026-08-14 00:00 |
02:42:41.34 |
+59:19:05.2 |
HIP 12572 |
21.86 |
| 2026-08-14 12:00 |
02:42:40.96 |
+59:19:21.1 |
HIP 12572 |
22.09 |
| 2026-08-15 00:00 |
02:42:40.55 |
+59:19:37.0 |
HIP 12572 |
22.32 |
| 2026-08-15 12:00 |
02:42:40.11 |
+59:19:52.8 |
HIP 12572 |
22.55 |
| 2026-08-16 00:00 |
02:42:39.65 |
+59:20:08.6 |
HIP 12572 |
22.78 |
| 2026-08-16 12:00 |
02:42:39.16 |
+59:20:24.3 |
HIP 12572 |
23.01 |
| 2026-08-17 00:00 |
02:42:38.65 |
+59:20:39.9 |
HIP 12572 |
23.23 |
| 2026-08-17 12:00 |
02:42:38.11 |
+59:20:55.5 |
HIP 12572 |
23.46 |
| 2026-08-18 00:00 |
02:42:37.55 |
+59:21:11.0 |
HIP 12572 |
23.68 |
| 2026-08-18 12:00 |
02:42:36.96 |
+59:21:26.4 |
HIP 12537 |
23.64 |
| 2026-08-19 00:00 |
02:42:36.35 |
+59:21:41.8 |
HIP 12537 |
23.38 |