| Parameter |
Value |
| Designation |
106P/Schuster |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-07-20T10:55:26.912640Z |
| Orbit solution date (soln_date, UTC) |
2024-08-26T13:15:29Z |
| Obs used |
745 |
| NEO |
- |
| M1 |
11.100 |
| K1 |
22.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-04-15.0000000 |
| e |
0.58951152 |
| q (au) |
1.540819 |
| a (au) |
3.753622 |
| i (deg) |
20.196367 |
| Ω (om, deg) |
50.325484 |
| ω (w, deg) |
355.982706 |
| M (ma, deg) |
85.998429 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.272 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.272 |
| 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 |
| 2021-05-06 |
2021-11-02 |
+20.2433 |
-4.423 |
| 2021-11-02 |
2022-03-25 |
+3.8248 |
-0.887 |
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 |
16:14:36.62 |
-24:35:49.3 |
HIP 79530 |
15.67 |
| 2026-03-26 12:00 |
16:14:30.99 |
-24:36:24.4 |
HIP 79530 |
15.16 |
| 2026-03-27 00:00 |
16:14:25.15 |
-24:36:59.0 |
HIP 79530 |
14.74 |
| 2026-03-27 12:00 |
16:14:19.11 |
-24:37:33.1 |
HIP 79530 |
14.42 |
| 2026-03-28 00:00 |
16:14:12.87 |
-24:38:06.8 |
HIP 79530 |
14.23 |
| 2026-03-28 12:00 |
16:14:06.43 |
-24:38:40.1 |
HIP 79530 |
14.17 |
| 2026-03-29 00:00 |
16:13:59.78 |
-24:39:12.9 |
HIP 79530 |
14.27 |
| 2026-03-29 12:00 |
16:13:52.93 |
-24:39:45.3 |
HIP 79530 |
14.53 |
| 2026-03-30 00:00 |
16:13:45.88 |
-24:40:17.2 |
HIP 79530 |
14.96 |
| 2026-03-30 12:00 |
16:13:38.63 |
-24:40:48.6 |
HIP 79530 |
15.57 |
| 2026-03-31 00:00 |
16:13:31.18 |
-24:41:19.6 |
HIP 79530 |
16.33 |
| 2026-03-31 12:00 |
16:13:23.53 |
-24:41:50.1 |
HIP 79530 |
17.25 |
| 2026-04-01 00:00 |
16:13:15.67 |
-24:42:20.1 |
HIP 79530 |
18.31 |
| 2026-04-01 12:00 |
16:13:07.62 |
-24:42:49.6 |
HIP 79530 |
19.51 |
| 2026-04-02 00:00 |
16:12:59.37 |
-24:43:18.7 |
HIP 79530 |
20.82 |
| 2026-04-02 12:00 |
16:12:50.92 |
-24:43:47.3 |
HIP 79530 |
22.25 |
| 2026-04-03 00:00 |
16:12:42.27 |
-24:44:15.4 |
HIP 79530 |
23.77 |
| 2026-04-03 12:00 |
16:12:33.42 |
-24:44:43.0 |
HIP 79530 |
25.39 |
| 2026-04-04 00:00 |
16:12:24.38 |
-24:45:10.1 |
HIP 79530 |
27.09 |
| 2026-04-04 12:00 |
16:12:15.14 |
-24:45:36.7 |
HIP 79268 |
25.24 |
| 2026-04-05 00:00 |
16:12:05.70 |
-24:46:02.8 |
HIP 79268 |
23.19 |
| 2026-04-05 12:00 |
16:11:56.06 |
-24:46:28.5 |
HIP 79268 |
21.13 |
| 2026-04-06 00:00 |
16:11:46.23 |
-24:46:53.6 |
HIP 79268 |
19.07 |
| 2026-04-06 12:00 |
16:11:36.20 |
-24:47:18.2 |
HIP 79268 |
17.05 |
| 2026-04-07 00:00 |
16:11:25.98 |
-24:47:42.3 |
HIP 79268 |
15.08 |
| 2026-04-07 12:00 |
16:11:15.57 |
-24:48:05.8 |
HIP 79268 |
13.22 |
| 2026-04-08 00:00 |
16:11:04.96 |
-24:48:28.9 |
HIP 79268 |
11.54 |
| 2026-04-08 12:00 |
16:10:54.16 |
-24:48:51.4 |
HIP 79268 |
10.16 |
| 2026-04-09 00:00 |
16:10:43.17 |
-24:49:13.4 |
HIP 79268 |
9.26 |
| 2026-04-09 12:00 |
16:10:31.98 |
-24:49:34.9 |
HIP 79268 |
9.02 |
| 2026-04-10 00:00 |
16:10:20.61 |
-24:49:55.8 |
HIP 79268 |
9.51 |
| 2026-04-10 12:00 |
16:10:09.05 |
-24:50:16.2 |
HIP 79268 |
10.67 |
| 2026-04-11 00:00 |
16:09:57.30 |
-24:50:36.0 |
HIP 79268 |
12.34 |
| 2026-04-11 12:00 |
16:09:45.36 |
-24:50:55.3 |
HIP 79268 |
14.36 |
| 2026-04-12 00:00 |
16:09:33.24 |
-24:51:14.1 |
HIP 79268 |
16.63 |
| 2026-04-12 12:00 |
16:09:20.93 |
-24:51:32.3 |
HIP 79268 |
19.07 |
| 2026-04-13 00:00 |
16:09:08.43 |
-24:51:50.0 |
HIP 79064 |
19.13 |
| 2026-04-13 12:00 |
16:08:55.76 |
-24:52:07.1 |
HIP 79064 |
17.41 |
| 2026-04-14 00:00 |
16:08:42.90 |
-24:52:23.6 |
HIP 79064 |
16.03 |
| 2026-04-14 12:00 |
16:08:29.86 |
-24:52:39.6 |
HIP 79064 |
15.11 |
| 2026-04-15 00:00 |
16:08:16.64 |
-24:52:55.0 |
HIP 79064 |
14.74 |
| 2026-04-15 12:00 |
16:08:03.24 |
-24:53:09.9 |
HIP 79064 |
15.00 |
| 2026-04-16 00:00 |
16:07:49.67 |
-24:53:24.1 |
HIP 79064 |
15.88 |