C/1996 R3 (Lagerkvist)
| Parameter |
Value |
| Designation |
C/1996 R3 (Lagerkvist) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1995-07-24T19:24:20.646720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:50Z |
| Obs used |
11 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1996-09-25.0000000 |
| e |
0.98703434 |
| q (au) |
5.238237 |
| a (au) |
404.008511 |
| i (deg) |
39.201397 |
| Ω (om, deg) |
172.724584 |
| ω (w, deg) |
130.933238 |
| M (ma, deg) |
0.051970 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.456 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.456 |
| n |
2.000 |
| gf |
0.925 |
| gb |
-0.999 |
| k |
1.000 |
| δ90 |
9.469 |
| 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 |
05:50:34.01 |
-16:08:01.8 |
HIP 27716 |
23.08 |
| 2026-02-03 12:00 |
05:50:32.39 |
-16:07:45.1 |
HIP 27716 |
23.42 |
| 2026-02-04 00:00 |
05:50:30.79 |
-16:07:28.2 |
HIP 27716 |
23.76 |
| 2026-02-04 12:00 |
05:50:29.20 |
-16:07:11.1 |
HIP 27716 |
24.10 |
| 2026-02-05 00:00 |
05:50:27.63 |
-16:06:54.0 |
HIP 27716 |
24.44 |
| 2026-02-05 12:00 |
05:50:26.08 |
-16:06:36.7 |
HIP 27716 |
24.78 |
| 2026-02-06 00:00 |
05:50:24.55 |
-16:06:19.2 |
HIP 27716 |
25.12 |
| 2026-02-06 12:00 |
05:50:23.03 |
-16:06:01.6 |
HIP 27716 |
25.46 |
| 2026-02-07 00:00 |
05:50:21.53 |
-16:05:43.9 |
HIP 27716 |
25.80 |
| 2026-02-07 12:00 |
05:50:20.05 |
-16:05:26.1 |
HIP 27716 |
26.14 |
| 2026-02-08 00:00 |
05:50:18.59 |
-16:05:08.1 |
HIP 27716 |
26.47 |
| 2026-02-08 12:00 |
05:50:17.14 |
-16:04:50.0 |
HIP 27716 |
26.81 |
| 2026-02-09 00:00 |
05:50:15.71 |
-16:04:31.8 |
HIP 27716 |
27.15 |
| 2026-02-09 12:00 |
05:50:14.30 |
-16:04:13.5 |
HIP 27716 |
27.48 |
| 2026-02-10 00:00 |
05:50:12.91 |
-16:03:55.0 |
HIP 27716 |
27.82 |
| 2026-02-10 12:00 |
05:50:11.53 |
-16:03:36.4 |
HIP 27716 |
28.15 |
| 2026-02-11 00:00 |
05:50:10.18 |
-16:03:17.7 |
HIP 27716 |
28.49 |
| 2026-02-11 12:00 |
05:50:08.84 |
-16:02:58.8 |
HIP 27716 |
28.82 |
| 2026-02-12 00:00 |
05:50:07.52 |
-16:02:39.9 |
HIP 27716 |
29.15 |
| 2026-02-12 12:00 |
05:50:06.22 |
-16:02:20.8 |
HIP 27716 |
29.48 |
| 2026-02-13 00:00 |
05:50:04.94 |
-16:02:01.6 |
HIP 27716 |
29.81 |
| 2026-02-13 12:00 |
05:50:03.68 |
-16:01:42.3 |
HIP 27716 |
30.13 |
| 2026-02-14 00:00 |
05:50:02.44 |
-16:01:22.9 |
HIP 27716 |
30.46 |
| 2026-02-14 12:00 |
05:50:01.21 |
-16:01:03.4 |
HIP 27716 |
30.78 |
| 2026-02-15 00:00 |
05:50:00.01 |
-16:00:43.8 |
HIP 27716 |
31.11 |
| 2026-02-15 12:00 |
05:49:58.82 |
-16:00:24.0 |
HIP 27716 |
31.43 |
| 2026-02-16 00:00 |
05:49:57.66 |
-16:00:04.2 |
HIP 27716 |
31.74 |
| 2026-02-16 12:00 |
05:49:56.51 |
-15:59:44.3 |
HIP 27716 |
32.06 |
| 2026-02-17 00:00 |
05:49:55.38 |
-15:59:24.2 |
HIP 27716 |
32.38 |
| 2026-02-17 12:00 |
05:49:54.28 |
-15:59:04.1 |
HIP 27716 |
32.69 |
| 2026-02-18 00:00 |
05:49:53.19 |
-15:58:43.8 |
HIP 27716 |
33.00 |
| 2026-02-18 12:00 |
05:49:52.12 |
-15:58:23.5 |
HIP 27716 |
33.31 |
| 2026-02-19 00:00 |
05:49:51.07 |
-15:58:03.1 |
HIP 27716 |
33.62 |
| 2026-02-19 12:00 |
05:49:50.05 |
-15:57:42.6 |
HIP 27716 |
33.93 |
| 2026-02-20 00:00 |
05:49:49.04 |
-15:57:22.0 |
HIP 27716 |
34.23 |
| 2026-02-20 12:00 |
05:49:48.05 |
-15:57:01.3 |
HIP 27716 |
34.53 |
| 2026-02-21 00:00 |
05:49:47.09 |
-15:56:40.5 |
HIP 27716 |
34.83 |
| 2026-02-21 12:00 |
05:49:46.14 |
-15:56:19.6 |
HIP 27716 |
35.13 |
| 2026-02-22 00:00 |
05:49:45.22 |
-15:55:58.6 |
HIP 27716 |
35.43 |
| 2026-02-22 12:00 |
05:49:44.31 |
-15:55:37.6 |
HIP 27716 |
35.72 |
| 2026-02-23 00:00 |
05:49:43.43 |
-15:55:16.5 |
HIP 27716 |
36.01 |
| 2026-02-23 12:00 |
05:49:42.57 |
-15:54:55.3 |
HIP 27716 |
36.30 |
| 2026-02-24 00:00 |
05:49:41.72 |
-15:54:34.0 |
HIP 27716 |
36.59 |