| Parameter |
Value |
| Designation |
56P/Slaughter-Burnham |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-07-18T01:58:14.727360Z |
| Orbit solution date (soln_date, UTC) |
2023-10-16T10:35:53Z |
| Obs used |
1986 |
| NEO |
- |
| M1 |
9.300 |
| K1 |
14.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-08-12.0000000 |
| e |
0.50729701 |
| q (au) |
2.505871 |
| a (au) |
5.085966 |
| i (deg) |
8.147198 |
| Ω (om, deg) |
346.037614 |
| ω (w, deg) |
44.217463 |
| M (ma, deg) |
267.962120 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.594 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.594 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2015-07-24 |
2016-07-15 |
+13.5328 |
-5.371 |
| 2016-07-20 |
2018-01-23 |
+3.6320 |
-1.563 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
19:18:41.26 |
-29:48:14.8 |
HIP 95003 |
16.18 |
| 2026-03-26 12:00 |
19:19:00.07 |
-29:48:16.8 |
HIP 95003 |
12.16 |
| 2026-03-27 00:00 |
19:19:18.72 |
-29:48:19.2 |
HIP 95003 |
8.22 |
| 2026-03-27 12:00 |
19:19:37.21 |
-29:48:21.9 |
HIP 95003 |
4.52 |
| 2026-03-28 00:00 |
19:19:55.54 |
-29:48:25.0 |
HIP 95003 |
2.33 |
| 2026-03-28 12:00 |
19:20:13.72 |
-29:48:28.4 |
HIP 95003 |
4.66 |
| 2026-03-29 00:00 |
19:20:31.73 |
-29:48:32.2 |
HIP 95003 |
8.28 |
| 2026-03-29 12:00 |
19:20:49.58 |
-29:48:36.3 |
HIP 95003 |
12.04 |
| 2026-03-30 00:00 |
19:21:07.26 |
-29:48:40.8 |
HIP 95164 |
14.18 |
| 2026-03-30 12:00 |
19:21:24.79 |
-29:48:45.7 |
HIP 95164 |
12.83 |
| 2026-03-31 00:00 |
19:21:42.15 |
-29:48:50.9 |
HIP 95164 |
12.54 |
| 2026-03-31 12:00 |
19:21:59.34 |
-29:48:56.5 |
HIP 95164 |
13.35 |
| 2026-04-01 00:00 |
19:22:16.36 |
-29:49:02.5 |
HIP 95164 |
15.05 |
| 2026-04-01 12:00 |
19:22:33.22 |
-29:49:08.8 |
HIP 95164 |
17.36 |
| 2026-04-02 00:00 |
19:22:49.91 |
-29:49:15.6 |
HIP 95164 |
20.06 |
| 2026-04-02 12:00 |
19:23:06.42 |
-29:49:22.7 |
HIP 95203 |
22.56 |
| 2026-04-03 00:00 |
19:23:22.77 |
-29:49:30.2 |
HIP 95203 |
24.95 |
| 2026-04-03 12:00 |
19:23:38.94 |
-29:49:38.2 |
HIP 95203 |
27.58 |
| 2026-04-04 00:00 |
19:23:54.94 |
-29:49:46.5 |
HIP 95203 |
30.35 |
| 2026-04-04 12:00 |
19:24:10.77 |
-29:49:55.2 |
HIP 95509 |
32.92 |
| 2026-04-05 00:00 |
19:24:26.42 |
-29:50:04.4 |
HIP 95509 |
31.11 |
| 2026-04-05 12:00 |
19:24:41.89 |
-29:50:13.9 |
HIP 95509 |
29.58 |
| 2026-04-06 00:00 |
19:24:57.18 |
-29:50:23.9 |
HIP 95619 |
26.53 |
| 2026-04-06 12:00 |
19:25:12.29 |
-29:50:34.3 |
HIP 95619 |
23.38 |
| 2026-04-07 00:00 |
19:25:27.23 |
-29:50:45.1 |
HIP 95619 |
20.32 |
| 2026-04-07 12:00 |
19:25:41.98 |
-29:50:56.3 |
HIP 95619 |
17.37 |
| 2026-04-08 00:00 |
19:25:56.54 |
-29:51:08.0 |
HIP 95619 |
14.56 |
| 2026-04-08 12:00 |
19:26:10.93 |
-29:51:20.1 |
HIP 95619 |
11.97 |
| 2026-04-09 00:00 |
19:26:25.12 |
-29:51:32.6 |
HIP 95619 |
9.73 |
| 2026-04-09 12:00 |
19:26:39.13 |
-29:51:45.6 |
HIP 95619 |
8.10 |
| 2026-04-10 00:00 |
19:26:52.95 |
-29:51:59.1 |
HIP 95619 |
7.44 |
| 2026-04-10 12:00 |
19:27:06.58 |
-29:52:13.0 |
HIP 95619 |
7.94 |
| 2026-04-11 00:00 |
19:27:20.03 |
-29:52:27.3 |
HIP 95619 |
9.38 |
| 2026-04-11 12:00 |
19:27:33.27 |
-29:52:42.1 |
HIP 95619 |
11.38 |
| 2026-04-12 00:00 |
19:27:46.33 |
-29:52:57.4 |
HIP 95619 |
13.68 |
| 2026-04-12 12:00 |
19:27:59.19 |
-29:53:13.1 |
HIP 95619 |
16.11 |
| 2026-04-13 00:00 |
19:28:11.86 |
-29:53:29.3 |
HIP 95619 |
18.62 |
| 2026-04-13 12:00 |
19:28:24.32 |
-29:53:45.9 |
HIP 95619 |
21.15 |
| 2026-04-14 00:00 |
19:28:36.59 |
-29:54:03.1 |
HIP 95619 |
23.69 |
| 2026-04-14 12:00 |
19:28:48.66 |
-29:54:20.7 |
HIP 95619 |
26.22 |
| 2026-04-15 00:00 |
19:29:00.53 |
-29:54:38.8 |
HIP 95941 |
26.65 |
| 2026-04-15 12:00 |
19:29:12.20 |
-29:54:57.3 |
HIP 95941 |
24.83 |
| 2026-04-16 00:00 |
19:29:23.66 |
-29:55:16.4 |
HIP 95941 |
23.18 |