6708 Bobbievaile

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6708 Bobbievaile
Discovery [1]
Discovered by R. H. McNaught
Discovery site Siding Spring Obs.
Discovery date 4 January 1989
MPC designation (6708) Bobbievaile
Named after
Bobbie Vaile
1989 AA5 · 1979 PF
1989 CM9 · 1994 LB
main-belt · (inner)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 37.81 yr (13,811 days)
Aphelion 2.8864 AU
Perihelion 2.0045 AU
2.4455 AU
Eccentricity 0.1803
3.82 yr (1,397 days)
0° 15m 27.72s / day
Inclination 12.076°
Known satellites 1 (period: 24.7 h)[4][3]
Physical characteristics
Dimensions 8.074±0.176 km[5]
12.3415±0.0004 h[3]

6708 Bobbievaile, provisional designation 1989 AA5, is a stony asteroid and asynchronous binary system from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 4 January 1989, by Australian astronomer Robert McNaught at the Siding Spring Observatory in New South Wales, Australia.[6] It is named after Bobbie Vaile.[2]

Orbit and classification[edit]

Bobbievaile is a stony S-type asteroid and orbits the Sun in the inner main-belt at a distance of 2.0–2.9 AU once every 3 years and 10 months (1,397 days). Its orbit has an eccentricity of 0.18 and an inclination of 12° with respect to the ecliptic.[1]

It was first identified as 1979 PF at El Leoncito in 1979, extending the body's observation arc by 10 years prior to its official discovery observation at Siding Spring.[6]

Binary asteroid[edit]

On 7 May 2009, it was announced that Bobbievaile was determined to be a binary asteroid based on a series of lightcurve observations. Bobbievaile (the primary) is estimated to have a diameter of 8.02±0.02 km, and its minor-planet moon (the secondary) to have a diameter of approximately 4.57 km.[4] The primary is probably spherical.


This minor planet was named in memory of Australian astrophysicist Roberta Anne "Bobbie" Vaile (1959–1996), lecturer at Western Sydney University. She was a SETI enthusiast and participated in both the establishment of the SETI Australia Centre and the conduction of Project Phoenix.[2] The official naming citation was published by the Minor Planet Center on 22 April 1997 (M.P.C. 29671).[7]


  1. ^ a b c d "JPL Small-Body Database Browser: 6708 Bobbievaile (1989 AA5)" (2017-06-06 last obs.). Jet Propulsion Laboratory. Retrieved 21 June 2017. 
  2. ^ a b c Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (6708) Bobbievaile. Springer Berlin Heidelberg. p. 551. ISBN 978-3-540-00238-3. Retrieved 13 March 2017. 
  3. ^ a b c d "LCDB Data for (6708) Bobbievaile". Asteroid Lightcurve Database (LCDB). Retrieved 13 March 2017. 
  4. ^ a b Johnston, Robert. "(6708) Bobbievaile". johnstonsarchive.net. Retrieved 29 May 2015. 
  5. ^ a b Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. Bibcode:2014ApJ...791..121M. arXiv:1406.6645Freely accessible. doi:10.1088/0004-637X/791/2/121. Retrieved 13 March 2017. 
  6. ^ a b "6708 Bobbievaile (1989 AA5)". Minor Planet Center. Retrieved 13 March 2017. 
  7. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 13 March 2017. 

External links[edit]