1703 Barry

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1703 Barry
Discovery [1]
Discovered by M. Wolf
Discovery site Heidelberg Obs.
Discovery date 2 September 1930
MPC designation (1703) Barry
Named after
Roger Barry (astronomer)[2]
1930 RB · 1939 FD
1940 TP · 1943 PA
1953 PK · 1963 SB
main-belt · Flora[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 86.57 yr (31,620 days)
Aphelion 2.5955 AU
Perihelion 1.8331 AU
2.2143 AU
Eccentricity 0.1721
3.30 yr (1,204 days)
0° 17m 56.76s / day
Inclination 4.5196°
Physical characteristics
Dimensions 9.21±0.49 km[4]
9.41±0.5 km[5]
9.50±0.24 km[6]
9.54 km (derived)[3]
105.7450±1.8907 h[7]
107.04±0.05 h[8]
107.1±0.5 h[9]
0.2805 (derived)[3]
11.845±0.001 (R)[7] · 12.00[4] · 12.06±0.30[10] · 12.1[1][3] · 12.40[5][6]

1703 Barry, provisional designation 1930 RB, is a stony Florian asteroid, suspected tumbler and slow rotator from the inner regions of the asteroid belt, approximately 9.5 kilometer in diameter. Discovered in by Max Wolf in 1930, it was later named after Vincentian priest and astronomer Roger Barry.


Barry was discovered on 2 September 1930, by German astronomer Max Wolf at Heidelberg Observatory in southern Germany.[11] In the same month, it was independently discovered by Dutch astronomer Hendrik van Gent and Soviet astronomer Evgenii Skvortsov at their observatories in Johannesburg and Crimea-Nauchnij, respectively.[2]

Orbit and classification[edit]

The relatively bright S-type asteroid is a member of the Flora family, one of the largest collisional groups in the main-belt.[5][6][4] It orbits the Sun in the inner main-belt at a distance of 1.8–2.6 AU once every 3 years and 4 months (1,204 days). Its orbit has an eccentricity of 0.17 and an inclination of 5° with respect to the ecliptic.[1] Its observation arc begins with its official discovery observation at Heidelberg.[11]

Physical characteristics[edit]

Slow rotator[edit]

Photometric observations taken in 2006 and 2011, by Adrián Galád and by the Palomar Transient Factory, showed a leisurely rotation period of 105.745 and 107.1±0.5 hours with a brightness variation of 0.5 and 0.46 magnitude, respectively (U=3/2).[7][8][9]

While most asteroids rotate within 20 hours once around their axis, Barry belongs to the relatively small group of slow rotators with a period above 100 hours.[3]

It may have a non-principal axis rotation.[9] However, no follow-up measurements have since confirmed its tumbling motion.[3]

Diameter and albedo[edit]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Barry measures between 9.21 and 9.50 kilometers in diameter and its surface has an albedo between 0.216 and 0.330,[4][5][6] while the Collaborative Asteroid Lightcurve Link derives an albedo of 0.280 and a diameter of 9.54 kilometers with an absolute magnitude of 12.1.[3]


This minor planet was named after Vincentian priest Roger Barry (1752–1813), the Court Astronomer of Grand Duchy of Baden at the Mannheim Observatory in 1788. The Heidelberg Observatory is a direct successor to the old Mannheim Observatory.[2] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 3933).[12]


  1. ^ a b c d "JPL Small-Body Database Browser: 1703 Barry (1930 RB)" (2017-03-29 last obs.). Jet Propulsion Laboratory. Retrieved 7 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1703) Barry. Springer Berlin Heidelberg. p. 135. ISBN 978-3-540-00238-3. Retrieved 18 December 2016. 
  3. ^ a b c d e f g h "LCDB Data for (1703) Barry". Asteroid Lightcurve Database (LCDB). Retrieved 18 December 2016. 
  4. ^ a b c d e Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 18 December 2016. 
  5. ^ a b c d e Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 18 December 2016. 
  6. ^ a b c d e Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 18 December 2016. 
  7. ^ a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 18 December 2016. 
  8. ^ a b Hanus, J.; Broz, M.; Durech, J.; Warner, B. D.; Brinsfield, J.; Durkee, R.; et al. (November 2013). "An anisotropic distribution of spin vectors in asteroid families". Astronomy and Astrophysics. 559: 19. arXiv:1309.4296Freely accessible. Bibcode:2013A&A...559A.134H. doi:10.1051/0004-6361/201321993. Retrieved 18 December 2016. 
  9. ^ a b c Galád, Adrián; Pravec, Petr; Gajdos, Stefan; Kornos, Leonard; Világi, Jozef (October 2007). "Seven Asteroids Studied from Modra Observatory in the Course of Binary Asteroid Photometric Campaign". Earth. 101 (1-2): 17–25. Bibcode:2007EM&P..101...17G. doi:10.1007/s11038-007-9146-6. Retrieved 18 December 2016. 
  10. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 18 December 2016. 
  11. ^ a b "1703 Barry (1930 RB)". Minor Planet Center. Retrieved 18 December 2016. 
  12. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 December 2016. 

External links[edit]