Quaoar and Weywot (50000 2002 LM60)
System parameters
| Heliocentric orbit | Photometry |
Position 2022/03/21 22:18 UTC |
| DES class = CLASSICAL |
HV = 2.737±0.008 |
+18:28:52.56 -15:18:11.9 |
| <a> = 43.39 (AU) |
V = 19.0 (V2 = 24.7) |
Uncertainty = 0.0 (arcsec) |
| <e> = 0.042 |
Δmag = 5.60 |
Rates: +0.999, +0.526 ("/hr) |
| <i> = 8.52 (degrees) |
B-V = 0.939±0.008 |
|
| Perihelion = 2072 |
V-R = 0.65±0.01 |
Opposition: June |
| Aphelion = 2215 |
|
|
Astrometric observations
| Observation time (UTC) | Observatory/Instrument | RA | DEC |
Δ (AU) | Δx (arcsec) |
Δx error | Δy (arcsec) |
Δy error |
| 2006/02/14 21.50915 |
HST/ACS-HRC |
+17:02:52.30 |
-15:30:10.3 |
43.64417 |
+0.32879 |
0.00797 |
-0.13111 |
0.00253 |
| 2007/03/19 15.38292 |
HST/WFPC2-PC |
+17:08:54.55 |
-15:28:27.5 |
43.08093 |
+0.31771 |
0.00188 |
-0.12884 |
0.00264 |
| 2008/03/10 04.92555 |
HST/WFPC2-PC |
+17:14:07.85 |
-15:32:43.4 |
43.21614 |
-0.39224 |
0.00396 |
-0.02512 |
0.00363 |
| 2008/03/15 01.51722 |
HST/WFPC2-PC |
+17:14:11.11 |
-15:31:52.0 |
43.13268 |
+0.40824 |
0.00371 |
-0.07205 |
0.00144 |
| 2008/03/20 16.46722 |
HST/WFPC2-PC |
+17:14:12.01 |
-15:30:49.6 |
43.03705 |
-0.36223 |
0.00332 |
+0.12295 |
0.00370 |
| 2011/06/07 07.88544 |
Keck 2/NIRC2 |
+17:26:23.86 |
-15:22:55.2 |
42.12520 |
+0.17000 |
0.01000 |
-0.16000 |
0.01000 |
| 2011/06/07 09.53688 |
Keck 2/NIRC2 |
+17:26:23.53 |
-15:22:54.8 |
42.12507 |
+0.18000 |
0.01000 |
-0.16000 |
0.01000 |
| 2011/06/07 10.98240 |
Keck 2/NIRC2 |
+17:26:23.24 |
-15:22:54.4 |
42.12496 |
+0.19000 |
0.01000 |
-0.17000 |
0.01000 |
| 2011/06/07 12.42216 |
Keck 2/NIRC2 |
+17:26:22.95 |
-15:22:54.1 |
42.12485 |
+0.20000 |
0.01000 |
-0.16000 |
0.01000 |
| plus proprietary data |
|
|
|
|
|
|
|
|
Orbital knowledge
Comments: Orbit published here. Note that our reduction of the HST data gives somewhat different astrometry (tabulated above), and thus a somewhat different orbit solution. The most noteworthy differences are that we get a smaller semimajor axis, smaller mass, and smaller eccentricity. The fact that we obtain such different solutions should make it clear that more data are needed.
| Parameter |
Value |
Units |
| P period | 12.431±0.001 | days |
| a semimajor axis | 13330±90 | kilometers |
| e eccentricity | 0.021±0.006 | dimensionless |
Breaking the mirror ambiguity...
Last updated: 2022/03/21 22:18 UTC