| Parameter |
Value |
| Designation |
C/1996 B1 (Szczepanski) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1996-02-06T21:56:56.152320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
489 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
31.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1996-02-24.0000000 |
| e |
0.99076543 |
| q (au) |
1.448788 |
| a (au) |
156.887422 |
| i (deg) |
51.918927 |
| Ω (om, deg) |
345.441855 |
| ω (w, deg) |
151.283322 |
| M (ma, deg) |
0.008569 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.421 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.421 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.907 |
| δ90 |
1.000 |
| 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 |
| 1996-02-07 |
1996-04-03 |
-0.9314 |
+0.297 |
| 1996-04-03 |
1996-05-22 |
+57.1178 |
-12.969 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
22:03:36.67 |
-49:37:31.5 |
HIP 109093 |
22.68 |
| 2026-06-01 12:00 |
22:03:36.06 |
-49:37:53.0 |
HIP 109093 |
22.80 |
| 2026-06-02 00:00 |
22:03:35.42 |
-49:38:14.5 |
HIP 109093 |
22.93 |
| 2026-06-02 12:00 |
22:03:34.76 |
-49:38:36.0 |
HIP 109093 |
23.07 |
| 2026-06-03 00:00 |
22:03:34.07 |
-49:38:57.6 |
HIP 109093 |
23.23 |
| 2026-06-03 12:00 |
22:03:33.35 |
-49:39:19.2 |
HIP 109093 |
23.39 |
| 2026-06-04 00:00 |
22:03:32.60 |
-49:39:40.9 |
HIP 109093 |
23.56 |
| 2026-06-04 12:00 |
22:03:31.83 |
-49:40:02.6 |
HIP 109093 |
23.74 |
| 2026-06-05 00:00 |
22:03:31.03 |
-49:40:24.4 |
HIP 109093 |
23.93 |
| 2026-06-05 12:00 |
22:03:30.20 |
-49:40:46.1 |
HIP 109093 |
24.13 |
| 2026-06-06 00:00 |
22:03:29.34 |
-49:41:07.9 |
HIP 109093 |
24.33 |
| 2026-06-06 12:00 |
22:03:28.46 |
-49:41:29.8 |
HIP 109093 |
24.55 |
| 2026-06-07 00:00 |
22:03:27.55 |
-49:41:51.6 |
HIP 109093 |
24.78 |
| 2026-06-07 12:00 |
22:03:26.61 |
-49:42:13.5 |
HIP 109093 |
25.01 |
| 2026-06-08 00:00 |
22:03:25.64 |
-49:42:35.5 |
HIP 109093 |
25.25 |
| 2026-06-08 12:00 |
22:03:24.65 |
-49:42:57.4 |
HIP 109093 |
25.50 |
| 2026-06-09 00:00 |
22:03:23.63 |
-49:43:19.4 |
HIP 109093 |
25.76 |
| 2026-06-09 12:00 |
22:03:22.58 |
-49:43:41.4 |
HIP 109093 |
26.03 |
| 2026-06-10 00:00 |
22:03:21.51 |
-49:44:03.4 |
HIP 109093 |
26.30 |
| 2026-06-10 12:00 |
22:03:20.41 |
-49:44:25.4 |
HIP 109093 |
26.58 |
| 2026-06-11 00:00 |
22:03:19.28 |
-49:44:47.5 |
HIP 109093 |
26.87 |
| 2026-06-11 12:00 |
22:03:18.12 |
-49:45:09.5 |
HIP 109093 |
27.17 |
| 2026-06-12 00:00 |
22:03:16.94 |
-49:45:31.6 |
HIP 109093 |
27.47 |
| 2026-06-12 12:00 |
22:03:15.73 |
-49:45:53.7 |
HIP 109093 |
27.78 |
| 2026-06-13 00:00 |
22:03:14.49 |
-49:46:15.8 |
HIP 109093 |
28.10 |
| 2026-06-13 12:00 |
22:03:13.23 |
-49:46:37.9 |
HIP 109093 |
28.42 |
| 2026-06-14 00:00 |
22:03:11.94 |
-49:47:00.0 |
HIP 109093 |
28.75 |
| 2026-06-14 12:00 |
22:03:10.62 |
-49:47:22.1 |
HIP 108651 |
28.47 |
| 2026-06-15 00:00 |
22:03:09.28 |
-49:47:44.2 |
HIP 108651 |
28.09 |
| 2026-06-15 12:00 |
22:03:07.91 |
-49:48:06.3 |
HIP 108651 |
27.71 |
| 2026-06-16 00:00 |
22:03:06.52 |
-49:48:28.4 |
HIP 108651 |
27.33 |
| 2026-06-16 12:00 |
22:03:05.10 |
-49:48:50.5 |
HIP 108651 |
26.95 |
| 2026-06-17 00:00 |
22:03:03.65 |
-49:49:12.6 |
HIP 108651 |
26.56 |
| 2026-06-17 12:00 |
22:03:02.17 |
-49:49:34.7 |
HIP 108651 |
26.18 |
| 2026-06-18 00:00 |
22:03:00.68 |
-49:49:56.8 |
HIP 108651 |
25.79 |
| 2026-06-18 12:00 |
22:02:59.15 |
-49:50:18.9 |
HIP 108651 |
25.40 |
| 2026-06-19 00:00 |
22:02:57.60 |
-49:50:40.9 |
HIP 108651 |
25.01 |
| 2026-06-19 12:00 |
22:02:56.02 |
-49:51:03.0 |
HIP 108651 |
24.61 |
| 2026-06-20 00:00 |
22:02:54.42 |
-49:51:25.0 |
HIP 108651 |
24.22 |
| 2026-06-20 12:00 |
22:02:52.80 |
-49:51:47.0 |
HIP 108651 |
23.82 |
| 2026-06-21 00:00 |
22:02:51.15 |
-49:52:09.0 |
HIP 108651 |
23.42 |
| 2026-06-21 12:00 |
22:02:49.47 |
-49:52:30.9 |
HIP 108651 |
23.02 |
| 2026-06-22 00:00 |
22:02:47.77 |
-49:52:52.9 |
HIP 108651 |
22.62 |