19982 Barbaradoore

19982 Barbaradoore
Discovery [1]
Discovered by E. F. Helin
Discovery site Palomar Obs.
Discovery date 22 January 1990
Designations
MPC designation 19982 Barbaradoore
Named after
 Barbara Doore
(discoverer's family)[2]
1990 BJ · 1983 AD2
Mars crosser [1][3]
main-belt [4]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 33.36 yr (12,186 days)
Aphelion 3.0035 AU
Perihelion 1.6657 AU
2.3346 AU
Eccentricity 0.2865
3.57 yr (1,303 days)
251.81°
0° 16m 34.68s / day
Inclination 22.326°
290.03°
106.87°
Physical characteristics
Dimensions 4.668±0.120 km[5][6]
5.02±0.14 km[7]
5.66 km (calculated)[3]
3.3162±0.0003 h[lower-alpha 1]
0.20 (assumed)[3]
0.306±0.040[7][6]
0.3540±0.0784[5]
S [3]
13.6[1][3] · 13.4[5][7] · 13.13±0.47[8]

    19982 Barbaradoore, provisional designation 1990 BJ, is an eccentric, stony asteroid from the inner regions of the asteroid belt, approximately 5 kilometers in diameter. It was discovered by American female astronomer Eleanor Helin at the U.S. Palomar Observatory, California, on 22 January 1990.[4]

    The S-type asteroid orbits the Sun at a distance of 1.7–3.0 AU once every 3 years and 7 months (1,303 days). Its orbit has an eccentricity of 0.29 and an inclination of 22° with respect to the ecliptic.[1] The Collaborative Asteroid Lightcurve Link (CALL) also classifies it as a Mars-crossing asteroid, because its perihelion lies between 1.3 and 1.668 AU (with no rounding),[9] while the MPC and JPL's database exclusively classifies the body as a main-belt and not as a Mars-crosser, since its perihelion of 1.6685 AU is larger than the aphelion of Mars (1.666 AU).[1] By these standards, the body does not even classify for an outer Mars grazer.

    A photometric light-curve analysis by Czech astronomer Petr Pravec at Ondřejov Observatory in 2010, rendered a well-defined rotation period of 3.3162±0.0003 hours with a brightness amplitude of 0.28 in magnitude (U=3).[lower-alpha 1] According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, the asteroid has a high albedo of 0.35 and 0.31 with a corresponding diameter of 5.0 and 5.7 kilometers, respectively,[5][7] while CALL assumes an albedo of 0.20, which is a more typical value for stony asteroids, and calculates a diameter of 4.7 kilometers.[3]

    The minor planet was named after a cousin of the discoverer, Barbara Hendricks Doore (b. 1933). She is described by the discoverer as an admirer of sports and as an appreciated leader and volunteer, who has dedicated much of her time at Cathedral City's Boys and Girls Club in California.[2] Naming citation was published on 24 June 2002 (M.P.C. 46012).[10]

    References

    1. 1 2 Pravec (2010): rotation period 3.3162±0.0003 hours with a brightness amplitude of 0.28 mag. CALL assigns a quality-code of Q=3, which denotes a "secure result within the precision given and no ambiguity". Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (19982) Barbaradoore and Ondrejov Asteroid Photometry Project – Pravec, P.; Wolf, M.; Sarounova, L. (2010)
    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 19982 Barbaradoore (1990 BJ)" (2016-05-22 last obs.). Jet Propulsion Laboratory. Retrieved 3 December 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (19982) Barbaradoore. Springer Berlin Heidelberg. p. 860. ISBN 978-3-540-00238-3. Retrieved 26 April 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (19982) Barbaradoore". Asteroid Lightcurve Database (LCDB). Retrieved 26 April 2016.
    4. 1 2 "19982 Barbaradoore (1990 BJ)". Minor Planet Center. Retrieved 26 April 2016.
    5. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 20 January 2016.
    6. 1 2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 3 December 2016.
    7. 1 2 3 4 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 20 January 2016.
    8. ↑ 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 26 April 2016.
    9. ↑ "LCDB readme – 2. Taxonomic Class, orbital class, and albedo". Asteroid Lightcurve Database (LCDB). Retrieved 20 January 2016.
    10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 26 April 2016.

    External links

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