| 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) |
| 2026-03-26 00:00 |
05:49:30.14 |
-15:32:03.5 |
HIP 27342 |
34.08 |
| 2026-03-26 12:00 |
05:49:30.60 |
-15:31:40.8 |
HIP 27342 |
33.99 |
| 2026-03-27 00:00 |
05:49:31.09 |
-15:31:18.2 |
HIP 27342 |
33.91 |
| 2026-03-27 12:00 |
05:49:31.59 |
-15:30:55.6 |
HIP 27342 |
33.84 |
| 2026-03-28 00:00 |
05:49:32.12 |
-15:30:33.0 |
HIP 27342 |
33.78 |
| 2026-03-28 12:00 |
05:49:32.66 |
-15:30:10.5 |
HIP 27342 |
33.73 |
| 2026-03-29 00:00 |
05:49:33.23 |
-15:29:48.0 |
HIP 27342 |
33.69 |
| 2026-03-29 12:00 |
05:49:33.82 |
-15:29:25.5 |
HIP 27342 |
33.66 |
| 2026-03-30 00:00 |
05:49:34.43 |
-15:29:03.1 |
HIP 27342 |
33.64 |
| 2026-03-30 12:00 |
05:49:35.05 |
-15:28:40.7 |
HIP 27342 |
33.62 |
| 2026-03-31 00:00 |
05:49:35.70 |
-15:28:18.4 |
HIP 27342 |
33.62 |
| 2026-03-31 12:00 |
05:49:36.38 |
-15:27:56.1 |
HIP 27342 |
33.62 |
| 2026-04-01 00:00 |
05:49:37.07 |
-15:27:33.9 |
HIP 27342 |
33.64 |
| 2026-04-01 12:00 |
05:49:37.78 |
-15:27:11.7 |
HIP 27342 |
33.67 |
| 2026-04-02 00:00 |
05:49:38.51 |
-15:26:49.5 |
HIP 27342 |
33.70 |
| 2026-04-02 12:00 |
05:49:39.26 |
-15:26:27.4 |
HIP 27342 |
33.75 |
| 2026-04-03 00:00 |
05:49:40.03 |
-15:26:05.4 |
HIP 27342 |
33.80 |
| 2026-04-03 12:00 |
05:49:40.82 |
-15:25:43.4 |
HIP 27342 |
33.87 |
| 2026-04-04 00:00 |
05:49:41.64 |
-15:25:21.5 |
HIP 27342 |
33.94 |
| 2026-04-04 12:00 |
05:49:42.47 |
-15:24:59.6 |
HIP 27707 |
33.92 |
| 2026-04-05 00:00 |
05:49:43.32 |
-15:24:37.8 |
HIP 27707 |
33.78 |
| 2026-04-05 12:00 |
05:49:44.19 |
-15:24:16.0 |
HIP 27707 |
33.63 |
| 2026-04-06 00:00 |
05:49:45.09 |
-15:23:54.3 |
HIP 27707 |
33.49 |
| 2026-04-06 12:00 |
05:49:46.00 |
-15:23:32.7 |
HIP 27707 |
33.35 |
| 2026-04-07 00:00 |
05:49:46.93 |
-15:23:11.1 |
HIP 27707 |
33.20 |
| 2026-04-07 12:00 |
05:49:47.88 |
-15:22:49.6 |
HIP 27707 |
33.06 |
| 2026-04-08 00:00 |
05:49:48.85 |
-15:22:28.1 |
HIP 27707 |
32.92 |
| 2026-04-08 12:00 |
05:49:49.84 |
-15:22:06.8 |
HIP 27707 |
32.77 |
| 2026-04-09 00:00 |
05:49:50.85 |
-15:21:45.4 |
HIP 27707 |
32.63 |
| 2026-04-09 12:00 |
05:49:51.88 |
-15:21:24.2 |
HIP 27707 |
32.49 |
| 2026-04-10 00:00 |
05:49:52.93 |
-15:21:03.0 |
HIP 27707 |
32.35 |
| 2026-04-10 12:00 |
05:49:54.00 |
-15:20:42.0 |
HIP 27707 |
32.20 |
| 2026-04-11 00:00 |
05:49:55.08 |
-15:20:20.9 |
HIP 27707 |
32.06 |
| 2026-04-11 12:00 |
05:49:56.19 |
-15:20:00.0 |
HIP 27707 |
31.92 |
| 2026-04-12 00:00 |
05:49:57.31 |
-15:19:39.1 |
HIP 27707 |
31.78 |
| 2026-04-12 12:00 |
05:49:58.46 |
-15:19:18.3 |
HIP 27707 |
31.64 |
| 2026-04-13 00:00 |
05:49:59.62 |
-15:18:57.6 |
HIP 27707 |
31.50 |
| 2026-04-13 12:00 |
05:50:00.80 |
-15:18:37.0 |
HIP 27707 |
31.36 |
| 2026-04-14 00:00 |
05:50:02.00 |
-15:18:16.5 |
HIP 27707 |
31.23 |
| 2026-04-14 12:00 |
05:50:03.22 |
-15:17:56.0 |
HIP 27707 |
31.09 |
| 2026-04-15 00:00 |
05:50:04.46 |
-15:17:35.7 |
HIP 27707 |
30.96 |
| 2026-04-15 12:00 |
05:50:05.72 |
-15:17:15.4 |
HIP 27707 |
30.83 |
| 2026-04-16 00:00 |
05:50:06.99 |
-15:16:55.2 |
HIP 27707 |
30.69 |