Varda and Ilmarë (174567 2003 MW12)
System parameters
| Heliocentric orbit | Photometry |
Position 2022/03/21 22:18 UTC |
| DES class = SCATEXTD |
HV = 3.57±0.01 |
+17:44:06.06 -02:06:14.3 |
| <a> = 45.78 (AU) |
V = 20.2 (V2 = 21.9) |
Uncertainty = 0.1 (arcsec) |
| <e> = 0.149 |
Δmag = 1.45 |
Rates: +0.261, +1.182 ("/hr) |
| <i> = 21.25 (degrees) |
B-V = 0.89±0.03 |
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| Perihelion = 2095 |
V-R = 0.54±0.03 |
Opposition: June |
| Aphelion = 2250 |
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Astrometric observations
| Observation time (UTC) | Observatory/Instrument | RA | DEC |
Δ (AU) | Δx (arcsec) |
Δx error | Δy (arcsec) |
Δy error |
| 2009/04/26 09.93111 |
HST/WFPC2-PC |
+16:45:42.36 |
-02:06:58.9 |
47.05469 |
+0.12311 |
0.00334 |
-0.01033 |
0.00201 |
| 2010/08/03 06.57464 |
Keck 2/NIRC2 |
+16:44:06.59 |
-01:59:48.9 |
47.21519 |
-0.09206 |
0.00200 |
-0.10862 |
0.00200 |
| 2010/08/03 08.34636 |
Keck 2/NIRC2 |
+16:44:06.45 |
-01:59:50.2 |
47.21619 |
-0.08012 |
0.00200 |
-0.11149 |
0.00200 |
| 2010/08/31 05.34569 |
HST/WFC3-UVIS |
+16:43:44.97 |
-02:09:42.1 |
47.63142 |
-0.13093 |
0.00097 |
-0.00172 |
0.00246 |
| 2010/09/01 13.03069 |
HST/WFC3-UVIS |
+16:43:45.50 |
-02:10:14.6 |
47.65206 |
-0.02228 |
0.00131 |
-0.13318 |
0.00137 |
| 2010/09/27 14.17417 |
HST/WFC3-UVIS |
+16:44:25.25 |
-02:21:32.9 |
48.04750 |
-0.00562 |
0.00467 |
+0.13799 |
0.00172 |
| 2011/07/09 18.96403 |
HST/WFC3-UVIS |
+16:49:30.78 |
-01:53:41.1 |
46.79484 |
+0.08235 |
0.00858 |
-0.11167 |
0.00413 |
| 2012/04/02 12.93875 |
GEMINI/NIRI |
+16:59:35.75 |
-02:13:51.0 |
47.01580 |
-0.11187 |
0.00300 |
+0.07594 |
0.00300 |
| 2012/05/06 11.23375 |
GEMINI/NIRI |
+16:58:06.22 |
-02:00:05.4 |
46.62621 |
-0.05069 |
0.00300 |
+0.12971 |
0.00300 |
| 2012/08/02 08.57090 |
GEMINI/NIRI |
+16:52:42.50 |
-01:57:36.7 |
46.93075 |
-0.10084 |
0.01354 |
-0.07780 |
0.00618 |
| 2013/04/22 11.71340 |
GEMINI/NIRI |
+17:03:13.83 |
-02:04:13.3 |
46.65088 |
-0.08404 |
0.00300 |
+0.09796 |
0.01080 |
| 2013/07/13 06.13701 |
GEMINI/NIRI |
+16:57:58.21 |
-01:52:00.8 |
46.56242 |
-0.12196 |
0.00332 |
-0.08097 |
0.00786 |
| plus proprietary data |
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Orbital knowledge
Comments: Orbit published here.
| Parameter |
Value |
Units |
| P period | 5.75080±0.00003 | days |
| a semimajor axis | 4800±30 | kilometers |
| e eccentricity | 0.019±0.005 | dimensionless |
Breaking the mirror ambiguity...
Last updated: 2022/03/21 22:18 UTC