| 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) |
| 2026-05-12 00:00 |
15:52:47.51 |
-24:52:14.8 |
HIP 77802 |
6.03 |
| 2026-05-12 12:00 |
15:52:27.44 |
-24:51:57.9 |
HIP 77754 |
9.13 |
| 2026-05-13 00:00 |
15:52:07.32 |
-24:51:40.5 |
HIP 77754 |
11.22 |
| 2026-05-13 12:00 |
15:51:47.14 |
-24:51:22.5 |
HIP 77754 |
14.52 |
| 2026-05-14 00:00 |
15:51:26.92 |
-24:51:04.0 |
HIP 77754 |
18.39 |
| 2026-05-14 12:00 |
15:51:06.64 |
-24:50:44.9 |
HIP 77754 |
22.55 |
| 2026-05-15 00:00 |
15:50:46.32 |
-24:50:25.4 |
HIP 77545 |
21.41 |
| 2026-05-15 12:00 |
15:50:25.96 |
-24:50:05.2 |
HIP 77545 |
19.87 |
| 2026-05-16 00:00 |
15:50:05.56 |
-24:49:44.6 |
HIP 77545 |
19.36 |
| 2026-05-16 12:00 |
15:49:45.13 |
-24:49:23.5 |
HIP 77545 |
19.94 |
| 2026-05-17 00:00 |
15:49:24.66 |
-24:49:01.8 |
HIP 77545 |
21.55 |
| 2026-05-17 12:00 |
15:49:04.17 |
-24:48:39.6 |
HIP 77545 |
23.98 |
| 2026-05-18 00:00 |
15:48:43.64 |
-24:48:17.0 |
HIP 77399 |
26.29 |
| 2026-05-18 12:00 |
15:48:23.10 |
-24:47:53.8 |
HIP 77399 |
25.43 |
| 2026-05-19 00:00 |
15:48:02.54 |
-24:47:30.2 |
HIP 77399 |
25.43 |
| 2026-05-19 12:00 |
15:47:41.96 |
-24:47:06.1 |
HIP 77399 |
26.28 |
| 2026-05-20 00:00 |
15:47:21.36 |
-24:46:41.5 |
HIP 77184 |
23.26 |
| 2026-05-20 12:00 |
15:47:00.76 |
-24:46:16.5 |
HIP 77184 |
18.58 |
| 2026-05-21 00:00 |
15:46:40.15 |
-24:45:51.0 |
HIP 77184 |
13.90 |
| 2026-05-21 12:00 |
15:46:19.54 |
-24:45:25.0 |
HIP 77184 |
9.23 |
| 2026-05-22 00:00 |
15:45:58.92 |
-24:44:58.6 |
HIP 77184 |
4.65 |
| 2026-05-22 12:00 |
15:45:38.31 |
-24:44:31.8 |
HIP 77184 |
1.45 |
| 2026-05-23 00:00 |
15:45:17.71 |
-24:44:04.6 |
HIP 77184 |
5.18 |
| 2026-05-23 12:00 |
15:44:57.11 |
-24:43:36.9 |
HIP 77184 |
9.78 |
| 2026-05-24 00:00 |
15:44:36.52 |
-24:43:08.8 |
HIP 77184 |
14.45 |
| 2026-05-24 12:00 |
15:44:15.95 |
-24:42:40.3 |
HIP 77077 |
18.95 |
| 2026-05-25 00:00 |
15:43:55.40 |
-24:42:11.4 |
HIP 77077 |
19.15 |
| 2026-05-25 12:00 |
15:43:34.86 |
-24:41:42.2 |
HIP 77077 |
20.45 |
| 2026-05-26 00:00 |
15:43:14.35 |
-24:41:12.5 |
HIP 77077 |
22.65 |
| 2026-05-26 12:00 |
15:42:53.87 |
-24:40:42.5 |
HIP 76969 |
24.83 |
| 2026-05-27 00:00 |
15:42:33.41 |
-24:40:12.1 |
HIP 76834 |
24.02 |
| 2026-05-27 12:00 |
15:42:12.99 |
-24:39:41.4 |
HIP 76834 |
20.45 |
| 2026-05-28 00:00 |
15:41:52.60 |
-24:39:10.3 |
HIP 76834 |
17.40 |
| 2026-05-28 12:00 |
15:41:32.25 |
-24:38:38.8 |
HIP 76834 |
15.19 |
| 2026-05-29 00:00 |
15:41:11.94 |
-24:38:07.1 |
HIP 76834 |
14.22 |
| 2026-05-29 12:00 |
15:40:51.67 |
-24:37:35.0 |
HIP 76834 |
14.72 |
| 2026-05-30 00:00 |
15:40:31.44 |
-24:37:02.6 |
HIP 76834 |
16.54 |
| 2026-05-30 12:00 |
15:40:11.27 |
-24:36:29.9 |
HIP 76834 |
19.32 |
| 2026-05-31 00:00 |
15:39:51.15 |
-24:35:56.9 |
HIP 76578 |
20.50 |
| 2026-05-31 12:00 |
15:39:31.08 |
-24:35:23.6 |
HIP 76578 |
16.15 |
| 2026-06-01 00:00 |
15:39:11.07 |
-24:34:50.0 |
HIP 76578 |
11.98 |
| 2026-06-01 12:00 |
15:38:51.11 |
-24:34:16.2 |
HIP 76578 |
8.29 |
| 2026-06-02 00:00 |
15:38:31.22 |
-24:33:42.1 |
HIP 76578 |
5.96 |