| 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) |
| 2026-09-20 00:00 |
02:41:08.51 |
+59:34:51.1 |
HIP 12537 |
8.12 |
| 2026-09-20 12:00 |
02:41:06.43 |
+59:34:59.7 |
HIP 12537 |
8.02 |
| 2026-09-21 00:00 |
02:41:04.34 |
+59:35:08.2 |
HIP 12537 |
7.94 |
| 2026-09-21 12:00 |
02:41:02.23 |
+59:35:16.6 |
HIP 12537 |
7.87 |
| 2026-09-22 00:00 |
02:41:00.10 |
+59:35:24.8 |
HIP 12537 |
7.81 |
| 2026-09-22 12:00 |
02:40:57.96 |
+59:35:32.9 |
HIP 12537 |
7.76 |
| 2026-09-23 00:00 |
02:40:55.79 |
+59:35:40.8 |
HIP 12537 |
7.74 |
| 2026-09-23 12:00 |
02:40:53.61 |
+59:35:48.7 |
HIP 12537 |
7.72 |
| 2026-09-24 00:00 |
02:40:51.41 |
+59:35:56.4 |
HIP 12416 |
7.71 |
| 2026-09-24 12:00 |
02:40:49.19 |
+59:36:03.9 |
HIP 12416 |
7.44 |
| 2026-09-25 00:00 |
02:40:46.96 |
+59:36:11.3 |
HIP 12416 |
7.16 |
| 2026-09-25 12:00 |
02:40:44.70 |
+59:36:18.6 |
HIP 12416 |
6.88 |
| 2026-09-26 00:00 |
02:40:42.43 |
+59:36:25.7 |
HIP 12416 |
6.60 |
| 2026-09-26 12:00 |
02:40:40.15 |
+59:36:32.7 |
HIP 12416 |
6.33 |
| 2026-09-27 00:00 |
02:40:37.84 |
+59:36:39.6 |
HIP 12416 |
6.05 |
| 2026-09-27 12:00 |
02:40:35.52 |
+59:36:46.3 |
HIP 12416 |
5.78 |
| 2026-09-28 00:00 |
02:40:33.18 |
+59:36:52.8 |
HIP 12416 |
5.50 |
| 2026-09-28 12:00 |
02:40:30.83 |
+59:36:59.3 |
HIP 12416 |
5.23 |
| 2026-09-29 00:00 |
02:40:28.46 |
+59:37:05.6 |
HIP 12416 |
4.97 |
| 2026-09-29 12:00 |
02:40:26.08 |
+59:37:11.7 |
HIP 12416 |
4.70 |
| 2026-09-30 00:00 |
02:40:23.67 |
+59:37:17.7 |
HIP 12416 |
4.44 |
| 2026-09-30 12:00 |
02:40:21.26 |
+59:37:23.6 |
HIP 12416 |
4.19 |
| 2026-10-01 00:00 |
02:40:18.82 |
+59:37:29.3 |
HIP 12416 |
3.94 |
| 2026-10-01 12:00 |
02:40:16.38 |
+59:37:34.9 |
HIP 12416 |
3.71 |
| 2026-10-02 00:00 |
02:40:13.91 |
+59:37:40.3 |
HIP 12416 |
3.48 |
| 2026-10-02 12:00 |
02:40:11.43 |
+59:37:45.6 |
HIP 12416 |
3.27 |
| 2026-10-03 00:00 |
02:40:08.94 |
+59:37:50.7 |
HIP 12416 |
3.07 |
| 2026-10-03 12:00 |
02:40:06.43 |
+59:37:55.7 |
HIP 12416 |
2.90 |
| 2026-10-04 00:00 |
02:40:03.91 |
+59:38:00.5 |
HIP 12416 |
2.75 |
| 2026-10-04 12:00 |
02:40:01.37 |
+59:38:05.2 |
HIP 12416 |
2.63 |
| 2026-10-05 00:00 |
02:39:58.82 |
+59:38:09.7 |
HIP 12416 |
2.54 |
| 2026-10-05 12:00 |
02:39:56.25 |
+59:38:14.1 |
HIP 12416 |
2.49 |
| 2026-10-06 00:00 |
02:39:53.68 |
+59:38:18.4 |
HIP 12416 |
2.49 |
| 2026-10-06 12:00 |
02:39:51.08 |
+59:38:22.5 |
HIP 12416 |
2.52 |
| 2026-10-07 00:00 |
02:39:48.48 |
+59:38:26.4 |
HIP 12416 |
2.60 |
| 2026-10-07 12:00 |
02:39:45.86 |
+59:38:30.2 |
HIP 12416 |
2.71 |
| 2026-10-08 00:00 |
02:39:43.23 |
+59:38:33.8 |
HIP 12416 |
2.86 |
| 2026-10-08 12:00 |
02:39:40.58 |
+59:38:37.3 |
HIP 12416 |
3.03 |
| 2026-10-09 00:00 |
02:39:37.92 |
+59:38:40.6 |
HIP 12416 |
3.24 |
| 2026-10-09 12:00 |
02:39:35.25 |
+59:38:43.8 |
HIP 12416 |
3.46 |
| 2026-10-10 00:00 |
02:39:32.57 |
+59:38:46.8 |
HIP 12416 |
3.70 |
| 2026-10-10 12:00 |
02:39:29.88 |
+59:38:49.7 |
HIP 12416 |
3.95 |
| 2026-10-11 00:00 |
02:39:27.17 |
+59:38:52.4 |
HIP 12416 |
4.21 |