C/1988 F1 (Levy)
| Parameter |
Value |
| Designation |
C/1988 F1 (Levy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1987-11-29T22:34:57.907200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:36Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
4.800 |
| K1 |
19.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1988-05-22.0000000 |
| e |
0.99771483 |
| q (au) |
1.174205 |
| a (au) |
513.837337 |
| i (deg) |
62.807742 |
| Ω (om, deg) |
288.763862 |
| ω (w, deg) |
326.514381 |
| M (ma, deg) |
0.014729 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.001 + 2.109\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.001 |
| n |
2.109 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-02-03 00:00 |
04:49:48.23 |
+65:13:03.9 |
HIP 22468 |
3.56 |
| 2026-02-03 12:00 |
04:49:45.99 |
+65:12:44.8 |
HIP 22468 |
3.95 |
| 2026-02-04 00:00 |
04:49:43.78 |
+65:12:25.7 |
HIP 22468 |
4.35 |
| 2026-02-04 12:00 |
04:49:41.61 |
+65:12:06.5 |
HIP 22468 |
4.74 |
| 2026-02-05 00:00 |
04:49:39.48 |
+65:11:47.2 |
HIP 22468 |
5.13 |
| 2026-02-05 12:00 |
04:49:37.38 |
+65:11:27.9 |
HIP 22468 |
5.52 |
| 2026-02-06 00:00 |
04:49:35.32 |
+65:11:08.6 |
HIP 22468 |
5.91 |
| 2026-02-06 12:00 |
04:49:33.30 |
+65:10:49.2 |
HIP 22468 |
6.29 |
| 2026-02-07 00:00 |
04:49:31.32 |
+65:10:29.7 |
HIP 22468 |
6.68 |
| 2026-02-07 12:00 |
04:49:29.37 |
+65:10:10.2 |
HIP 22468 |
7.06 |
| 2026-02-08 00:00 |
04:49:27.46 |
+65:09:50.6 |
HIP 22468 |
7.45 |
| 2026-02-08 12:00 |
04:49:25.59 |
+65:09:31.0 |
HIP 22468 |
7.83 |
| 2026-02-09 00:00 |
04:49:23.76 |
+65:09:11.3 |
HIP 22468 |
8.21 |
| 2026-02-09 12:00 |
04:49:21.96 |
+65:08:51.5 |
HIP 22468 |
8.59 |
| 2026-02-10 00:00 |
04:49:20.20 |
+65:08:31.8 |
HIP 22468 |
8.96 |
| 2026-02-10 12:00 |
04:49:18.48 |
+65:08:12.0 |
HIP 22468 |
9.34 |
| 2026-02-11 00:00 |
04:49:16.80 |
+65:07:52.1 |
HIP 22468 |
9.71 |
| 2026-02-11 12:00 |
04:49:15.16 |
+65:07:32.2 |
HIP 22468 |
10.08 |
| 2026-02-12 00:00 |
04:49:13.55 |
+65:07:12.3 |
HIP 22468 |
10.46 |
| 2026-02-12 12:00 |
04:49:11.98 |
+65:06:52.3 |
HIP 22468 |
10.83 |
| 2026-02-13 00:00 |
04:49:10.46 |
+65:06:32.3 |
HIP 22468 |
11.19 |
| 2026-02-13 12:00 |
04:49:08.97 |
+65:06:12.3 |
HIP 22468 |
11.56 |
| 2026-02-14 00:00 |
04:49:07.52 |
+65:05:52.2 |
HIP 22468 |
11.92 |
| 2026-02-14 12:00 |
04:49:06.11 |
+65:05:32.1 |
HIP 22468 |
12.29 |
| 2026-02-15 00:00 |
04:49:04.74 |
+65:05:11.9 |
HIP 22468 |
12.65 |
| 2026-02-15 12:00 |
04:49:03.41 |
+65:04:51.8 |
HIP 22468 |
13.01 |
| 2026-02-16 00:00 |
04:49:02.11 |
+65:04:31.6 |
HIP 22468 |
13.37 |
| 2026-02-16 12:00 |
04:49:00.86 |
+65:04:11.4 |
HIP 22468 |
13.73 |
| 2026-02-17 00:00 |
04:48:59.64 |
+65:03:51.1 |
HIP 22468 |
14.08 |
| 2026-02-17 12:00 |
04:48:58.47 |
+65:03:30.9 |
HIP 22468 |
14.44 |
| 2026-02-18 00:00 |
04:48:57.33 |
+65:03:10.6 |
HIP 22468 |
14.79 |
| 2026-02-18 12:00 |
04:48:56.24 |
+65:02:50.3 |
HIP 22468 |
15.14 |
| 2026-02-19 00:00 |
04:48:55.18 |
+65:02:30.0 |
HIP 22468 |
15.49 |
| 2026-02-19 12:00 |
04:48:54.17 |
+65:02:09.7 |
HIP 22468 |
15.84 |
| 2026-02-20 00:00 |
04:48:53.19 |
+65:01:49.4 |
HIP 22468 |
16.19 |
| 2026-02-20 12:00 |
04:48:52.25 |
+65:01:29.0 |
HIP 22468 |
16.53 |
| 2026-02-21 00:00 |
04:48:51.36 |
+65:01:08.7 |
HIP 22468 |
16.88 |
| 2026-02-21 12:00 |
04:48:50.50 |
+65:00:48.3 |
HIP 22468 |
17.22 |
| 2026-02-22 00:00 |
04:48:49.68 |
+65:00:27.9 |
HIP 22468 |
17.56 |
| 2026-02-22 12:00 |
04:48:48.91 |
+65:00:07.6 |
HIP 22468 |
17.90 |
| 2026-02-23 00:00 |
04:48:48.17 |
+64:59:47.2 |
HIP 22468 |
18.24 |
| 2026-02-23 12:00 |
04:48:47.47 |
+64:59:26.8 |
HIP 22468 |
18.57 |
| 2026-02-24 00:00 |
04:48:46.81 |
+64:59:06.5 |
HIP 22190 |
18.38 |