106P/Schuster
| 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) |
| 2026-02-03 00:00 |
16:07:30.93 |
-23:04:21.5 |
HIP 78947 |
9.19 |
| 2026-02-03 12:00 |
16:07:43.46 |
-23:05:31.1 |
HIP 78947 |
12.20 |
| 2026-02-04 00:00 |
16:07:55.85 |
-23:06:40.5 |
HIP 78947 |
15.22 |
| 2026-02-04 12:00 |
16:08:08.11 |
-23:07:49.5 |
HIP 78947 |
18.23 |
| 2026-02-05 00:00 |
16:08:20.23 |
-23:08:58.3 |
HIP 78947 |
21.21 |
| 2026-02-05 12:00 |
16:08:32.22 |
-23:10:06.8 |
HIP 78947 |
24.18 |
| 2026-02-06 00:00 |
16:08:44.06 |
-23:11:15.1 |
HIP 79250 |
23.79 |
| 2026-02-06 12:00 |
16:08:55.77 |
-23:12:23.0 |
HIP 79250 |
21.45 |
| 2026-02-07 00:00 |
16:09:07.34 |
-23:13:30.7 |
HIP 79250 |
19.30 |
| 2026-02-07 12:00 |
16:09:18.77 |
-23:14:38.0 |
HIP 79250 |
17.39 |
| 2026-02-08 00:00 |
16:09:30.06 |
-23:15:45.1 |
HIP 79250 |
15.79 |
| 2026-02-08 12:00 |
16:09:41.20 |
-23:16:51.9 |
HIP 79250 |
14.59 |
| 2026-02-09 00:00 |
16:09:52.20 |
-23:17:58.4 |
HIP 79250 |
13.87 |
| 2026-02-09 12:00 |
16:10:03.06 |
-23:19:04.5 |
HIP 79250 |
13.69 |
| 2026-02-10 00:00 |
16:10:13.77 |
-23:20:10.5 |
HIP 79250 |
14.04 |
| 2026-02-10 12:00 |
16:10:24.33 |
-23:21:16.1 |
HIP 79250 |
14.88 |
| 2026-02-11 00:00 |
16:10:34.74 |
-23:22:21.4 |
HIP 79250 |
16.12 |
| 2026-02-11 12:00 |
16:10:45.00 |
-23:23:26.4 |
HIP 79250 |
17.64 |
| 2026-02-12 00:00 |
16:10:55.11 |
-23:24:31.1 |
HIP 79383 |
18.97 |
| 2026-02-12 12:00 |
16:11:05.07 |
-23:25:35.6 |
HIP 79383 |
17.69 |
| 2026-02-13 00:00 |
16:11:14.88 |
-23:26:39.7 |
HIP 79383 |
16.72 |
| 2026-02-13 12:00 |
16:11:24.53 |
-23:27:43.6 |
HIP 79383 |
16.09 |
| 2026-02-14 00:00 |
16:11:34.03 |
-23:28:47.1 |
HIP 79383 |
15.84 |
| 2026-02-14 12:00 |
16:11:43.38 |
-23:29:50.3 |
HIP 79383 |
15.96 |
| 2026-02-15 00:00 |
16:11:52.56 |
-23:30:53.3 |
HIP 79383 |
16.44 |
| 2026-02-15 12:00 |
16:12:01.59 |
-23:31:55.9 |
HIP 79383 |
17.22 |
| 2026-02-16 00:00 |
16:12:10.45 |
-23:32:58.3 |
HIP 79462 |
16.75 |
| 2026-02-16 12:00 |
16:12:19.16 |
-23:34:00.3 |
HIP 79462 |
16.49 |
| 2026-02-17 00:00 |
16:12:27.71 |
-23:35:02.0 |
HIP 79462 |
16.54 |
| 2026-02-17 12:00 |
16:12:36.09 |
-23:36:03.5 |
HIP 79462 |
16.89 |
| 2026-02-18 00:00 |
16:12:44.31 |
-23:37:04.6 |
HIP 79462 |
17.50 |
| 2026-02-18 12:00 |
16:12:52.36 |
-23:38:05.4 |
HIP 79557 |
18.01 |
| 2026-02-19 00:00 |
16:13:00.25 |
-23:39:06.0 |
HIP 79557 |
15.94 |
| 2026-02-19 12:00 |
16:13:07.98 |
-23:40:06.2 |
HIP 79557 |
13.91 |
| 2026-02-20 00:00 |
16:13:15.53 |
-23:41:06.1 |
HIP 79557 |
11.91 |
| 2026-02-20 12:00 |
16:13:22.92 |
-23:42:05.7 |
HIP 79557 |
9.95 |
| 2026-02-21 00:00 |
16:13:30.14 |
-23:43:05.0 |
HIP 79557 |
8.04 |
| 2026-02-21 12:00 |
16:13:37.19 |
-23:44:03.9 |
HIP 79557 |
6.17 |
| 2026-02-22 00:00 |
16:13:44.07 |
-23:45:02.6 |
HIP 79557 |
4.35 |
| 2026-02-22 12:00 |
16:13:50.77 |
-23:46:01.0 |
HIP 79557 |
2.61 |
| 2026-02-23 00:00 |
16:13:57.31 |
-23:46:59.0 |
HIP 79557 |
1.21 |
| 2026-02-23 12:00 |
16:14:03.67 |
-23:47:56.7 |
HIP 79557 |
1.55 |
| 2026-02-24 00:00 |
16:14:09.86 |
-23:48:54.2 |
HIP 79557 |
3.04 |