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=== NRAO === [[https://science.nrao.edu/science/service-observing|Analysis of public VLA observations]] === SWIFT === [[http://swift-sgra.com/ | Analysis of Swift data]] === Orbital Elements === ||<rowstyle="background-color: #E0E0FF;"> Parameter || [[http://adsabs.harvard.edu/abs/2012Natur.481...51G|Gillessen et al. 2012a]] || [[http://adsabs.harvard.edu/abs/2013ApJ...763...78G|Gillessen et al. 2013]] || [[ http://adsabs.harvard.edu/abs/2013arXiv1304.5280P | Phifer et al. 2013]] || ||semi major axis (mas)|| 521 ± 28 ||666 ± 39|| 880 || ||eccentricity|| 0.9384 ± 0.0066 ||0.9664 ± 0.0026|| 0.9814 ± 0.0060 || ||inclination [°]|| 106.55 ± 0.88|| 109.48 ± 0.81|| 121 ± 3 || ||position angle of ascending node [°]|| 101.5 ± 1.1|| 95.8 ± 1.1|| 56 ± 11 || ||longitude of periastron [°]|| 109.59 ± 0.78|| 108.50 ± 0.74|| 88 ± 6|| ||epoch of periastron [yr]|| 2013.51 ± 0.04|| 2013.69 ± 0.04|| 2014.21 ± 0.14 || ||orbital period [yr]|| 137 ± 11 ||198 ± 18|| === Astrometry & Radial Velocities === ||<rowstyle="background-color: #E0E0FF;"> Epoch [Julian year] || R.A. [''] || Dec [''] || error estimate [''] || ||2002.6 || 0.2771 || -0.155712 || 0.002 || ||2003.4 || 0.276067 || -0.140544 || 0.002 || ||2004.6 || 0.263562 || -0.130565 || 0.002 || ||2005.4 || 0.264142 || -0.123733 || 0.002 || ||2006.4 || 0.240084 || -0.109394 || 0.002 || ||2007.3 || 0.225361 || -0.102138 || 0.002 || ||2008.5 || 0.209801 || -0.0879578 || 0.002 || ||2009.25 || 0.193148 || -0.0740471 || 0.002 || ||2010.5 || 0.158347 || -0.0540539 || 0.002 || ||2011.3 || 0.139725 || -0.0393364 || 0.002 || ||2011.5 || 0.134431 || -0.0376276 || 0.002 || ||2012.2 || 0.113924 || -0.0374186 || 0.005 || ||2012.2126 || 0.122807 || -0.0228154 || 0.005 || ||2012.4942 || 0.10694 || -0.0138847 || 0.005 || ||<rowstyle="background-color: #E0E0FF;"> Epoch [Julian year] || vLSR [km/s] || error estimate [km/s] || ||2003.2711|| 990 || 50|| ||2004.5356|| 1052|| 30|| ||2005.2153|| 1010|| 50|| ||2008.2624|| 1256|| 20|| ||2009.3851|| 1404|| 30|| ||2010.3539|| 1522|| 25|| ||2011.3169|| 1692|| 60|| ||2011.5665|| 1640|| 60|| ||2012.2126|| 1934|| 50|| ||2012.3612|| 1930|| 50|| ||2012.4942|| 2030|| 50|| |
Plots and Data
NRAO
Analysis of public VLA observations
SWIFT
Orbital Elements
Parameter |
|||
semi major axis (mas) |
521 ± 28 |
666 ± 39 |
880 |
eccentricity |
0.9384 ± 0.0066 |
0.9664 ± 0.0026 |
0.9814 ± 0.0060 |
inclination [°] |
106.55 ± 0.88 |
109.48 ± 0.81 |
121 ± 3 |
position angle of ascending node [°] |
101.5 ± 1.1 |
95.8 ± 1.1 |
56 ± 11 |
longitude of periastron [°] |
109.59 ± 0.78 |
108.50 ± 0.74 |
88 ± 6 |
epoch of periastron [yr] |
2013.51 ± 0.04 |
2013.69 ± 0.04 |
2014.21 ± 0.14 |
orbital period [yr] |
137 ± 11 |
198 ± 18 |
Astrometry & Radial Velocities
Epoch [Julian year] |
R.A. [] |
Dec [] |
error estimate [] |
2002.6 |
0.2771 |
-0.155712 |
0.002 |
2003.4 |
0.276067 |
-0.140544 |
0.002 |
2004.6 |
0.263562 |
-0.130565 |
0.002 |
2005.4 |
0.264142 |
-0.123733 |
0.002 |
2006.4 |
0.240084 |
-0.109394 |
0.002 |
2007.3 |
0.225361 |
-0.102138 |
0.002 |
2008.5 |
0.209801 |
-0.0879578 |
0.002 |
2009.25 |
0.193148 |
-0.0740471 |
0.002 |
2010.5 |
0.158347 |
-0.0540539 |
0.002 |
2011.3 |
0.139725 |
-0.0393364 |
0.002 |
2011.5 |
0.134431 |
-0.0376276 |
0.002 |
2012.2 |
0.113924 |
-0.0374186 |
0.005 |
2012.2126 |
0.122807 |
-0.0228154 |
0.005 |
2012.4942 |
0.10694 |
-0.0138847 |
0.005 |
Epoch [Julian year] |
vLSR [km/s] |
error estimate [km/s] |
2003.2711 |
990 |
50 |
2004.5356 |
1052 |
30 |
2005.2153 |
1010 |
50 |
2008.2624 |
1256 |
20 |
2009.3851 |
1404 |
30 |
2010.3539 |
1522 |
25 |
2011.3169 |
1692 |
60 |
2011.5665 |
1640 |
60 |
2012.2126 |
1934 |
50 |
2012.3612 |
1930 |
50 |
2012.4942 |
2030 |
50 |