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
main-belt · Mars crosser [3]
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 32.20 yr (11,761 days)
Aphelion 3.0034 AU
Perihelion 1.6685 AU
2.3360 AU
Eccentricity 0.2857
3.57 yr (1,304 days)
86.036°
Inclination 22.327°
290.08°
106.87°
Earth MOID 0.8080 AU
Physical characteristics
Dimensions 4.668±0.120 km[4]
5.02±0.14 km[5]
5.66 km (calculated)[3]
3.3162±0.0003 h[lower-alpha 1]
0.3540±0.0784[4]
0.306±0.040[5]
0.20 (assumed)[3]
S [3]
13.6[1][3]
13.4[4][5]

    19982 Barbaradoore, provisional designation 1990 BJ, is an eccentric, stony asteroid from the inner regions of the asteroid belt, about 5 kilometers in diameter. It was discovered by American female astronomer Eleanor Helin at the U.S. Palomar Observatory, California, on 22 January 1990.[6]

    The S-type asteroid orbits the Sun at a distance of 1.7–3.0 AU once every 3 years and 7 months (1,304 days). Its orbit shows a notable eccentricity of 0.29 and an inclination of 22 degrees from the plane of 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).[7] On the other hand, the JPL Small-Body 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] Hence 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.[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,[4][5] 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 has been described as an active sports enthusiast with boundless energy, who excelled at sailing and golf. As a popular leader/volunteer, she has devoted much of her later years to the Boys and Girls Club of Cathedral City, California.[2]

    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
    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 19982 Barbaradoore (1990 BJ)" (2015-03-24 last obs.). Jet Propulsion Laboratory. Retrieved January 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 January 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (19982) Barbaradoore". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.
    4. 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. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved January 2016.
    5. 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. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved January 2016.
    6. ↑ "19982 Barbaradoore (1990 BJ)". Minor Planet Center. Retrieved January 2016.
    7. ↑ "LCDB readme – 2. Taxonomic Class, orbital class, and albedo". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.

    External links


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