- ID:
- ivo://CDS.VizieR/J/AJ/154/183
- Title:
- Speckle interferometry at the USNO. XXII.
- Short Name:
- J/AJ/154/183
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of 4747 intensified CCD observations of double stars, made with the 26 inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 2667 mean relative positions and range in separation from 0.328" to 95.9", with a median separation of 8.673". Eight orbits are improved. This is the 22nd in this series of papers and covers the period 2016 January 4 through 2016 December 29.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/AJ/156/240
- Title:
- Speckle interferometry at the USNO. XXIII.
- Short Name:
- J/AJ/156/240
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of 3989 intensified CCD observations of double stars, made with the 26-inch refractor of the U.S. Naval Observatory, are presented. Each observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 1911 mean relative positions and range in separation from 0.289" to 128.638", with a median separation of 8.669". Four orbits are improved. This is the 23rd in this series of papers and covers the period 2017 January 4 through 2017 September 13.
- ID:
- ivo://CDS.VizieR/J/AJ/117/1905
- Title:
- Speckle interferometry at USNO. II.
- Short Name:
- J/AJ/117/1905
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Position angles and separations resulting from 2406 speckle interferometric observations of 547 binary stars are tabulated. This is the second in a series of papers presenting measures obtained using the 66 cm refractor at the US Naval Observatory in Washington, DC, with an intensified CCD detector. Program stars range in separation from 0.2'' to 3.8'', with {delta}m {<=} 2.5 mag and a limiting magnitude of V = 10.0. The observation epochs run from 1993 January through 1995 August. Random errors are estimated to be 14 mas in separation and (0.52 degrees)/{rho} in position angle, where {rho} is the separation in arcseconds.
- ID:
- ivo://CDS.VizieR/J/AJ/127/539
- Title:
- Speckle interferometry at USNO. IX.
- Short Name:
- J/AJ/127/539
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of 3056 speckle interferometric observations of double stars, made with the 26 inch (66cm) refractor of the US Naval Observatory, are presented. Each speckle interferometric observation of a system represents a combination of over a thousand short-exposure images. These observations are averaged into 1675 mean relative positions and range in separation from 0.19" to 45.21", with a median separation of 2.99". This is the ninth in a series of papers presenting measures obtained with this system and covers the period 2002 January 1 through 2002 December 29. Included in these data are 28 older measures whose positions were previously deemed possibly aberrant but are no longer classified this way following a confirming observation. Nine of these systems have new orbital elements, which are presented here as well.
- ID:
- ivo://CDS.VizieR/J/AJ/122/1586
- Title:
- Speckle interferometry at USNO. VII.
- Short Name:
- J/AJ/122/1586
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of 2014 speckle interferometric observations of double stars, made with the 26 inch (66cm) refractor of the US Naval Observatory, are presented. These observations are averaged into 1266 mean positions and range in separation from 0.21" to 13.41", with a mean separation of 2.61". his is the seventh in a series of papers presenting measures obtained with this system and covers the period 2000 January 10 through December 8.
- ID:
- ivo://CDS.VizieR/J/AJ/124/2254
- Title:
- Speckle interferometry at USNO. VIII.
- Short Name:
- J/AJ/124/2254
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of 2044 speckle interferometric observations of double stars, made with the 26 inch (66cm) refractor of the US Naval Observatory, are presented. Each speckle interferometric observation of a system represents a combination of over a thousand short-exposure images. These observations are averaged into 1399 mean positions and range in separation from 0.16" to 14.97", with a mean separation of 2.51". This is the eighth in a series of papers presenting measures obtained with this system and covers the period 2001 March 18 through 2001 December 30.
- ID:
- ivo://CDS.VizieR/J/AJ/128/3012
- Title:
- Speckle interferometry at USNO. X.
- Short Name:
- J/AJ/128/3012
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of 3047 speckle interferometric observations of double stars, made with the 26inch (66cm) refractor of the US Naval Observatory, are presented. Each speckle interferometric observation of a system represents a combination of over a thousand short-exposure images. These observations are averaged into 1572 mean relative positions and range in separation from 0.20" to 62.86", with a median separation of 4.19". This is the 10th in a series of papers presenting measures obtained with this system and covers the period 2003 January 13 through 2003 December 1.
- ID:
- ivo://CDS.VizieR/J/AJ/131/2687
- Title:
- Speckle interferometry at USNO. XI
- Short Name:
- J/AJ/131/2687
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of 1683 speckle interferometric observations of double stars, made with the 26 inch (66 cm) refractor of the US Naval Observatory, are presented. Each speckle interferometric observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 805 mean relative positions and range in separation from 0.23" to 43.34", with a median separation of 4.33". This is the 11th in a series of papers presenting measurements obtained with this system and covers the period 2004 January 4-December 30. Included in these data are two older measurements whose positions were previously deemed possibly aberrant but are no longer classified this way following a confirming observation. Two of these systems have new orbital elements, which are also presented here.
- ID:
- ivo://CDS.VizieR/J/AJ/132/2219
- Title:
- Speckle interferometry at USNO. XII
- Short Name:
- J/AJ/132/2219
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of 1657 speckle interferometric observations of double stars, made with the 26-inch (66cm) refractor of the US Naval Observatory, are presented. Each speckle interferometric observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 1111 mean relative positions and range in separation from 0.16" to 16.99", with a median separation of 1.65". This is the 12th in a series of papers presenting measurements obtained with this system and covers the period 2005 January 3-December 29. Included in these data are 30 older measurements whose positions were previously deemed possibly aberrant but are no longer classified this way following a confirming observation. Sixteen of these systems have new orbital elements, which are presented here as well. For eta Coronae Borealis (STF 1937) we determine masses of 1.207 and 1.077M_{sun}_ and an orbital parallax of 54.95mas.
- ID:
- ivo://CDS.VizieR/J/AJ/134/1671
- Title:
- Speckle interferometry at USNO. XIII
- Short Name:
- J/AJ/134/1671
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of 1424 speckle interferometric observations of double stars, made with the 26 inch (66cm) refractor of the US Naval Observatory, are presented. Each speckle interferometric observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 1053 mean relative positions and range in separation from 0.36" to 61.92", with a median separation of 10.31". This is the 13th in a series of papers presenting measurements obtained with this system and covers the period 2006 January 12-December 29. Included in these data are nine older measurements whose positions were previously deemed possibly aberrant but are no longer classified this way following a confirming observation. This paper also includes the first data obtained using a new "secondary" camera, designed and built at USNO.
