40463 Frankkameny

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40463 Frankkameny
Discovery  [1]
Discovered by G. W. Billings
Discovery site Calgary Obs. ( 681 )
Discovery date15 September 1999
Designations
(40463) Frankkameny
Named after
 Frank Kameny
(gay rights activist) [2]
1999 RE44 ·1997 EJ19  
main-belt  ·(middle)
background
Orbital characteristics   [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 19.17 yr (7,002 days)
Aphelion 3.2810 AU
Perihelion 2.2761 AU
2.7786 AU
Eccentricity 0.1808
4.63 yr (1,692 days)
338.05°
0° 12m 46.08s / day
Inclination 2.4415°
302.75°
32.248°
Physical characteristics
3.855±0.638  km [3] [4]
4.23 km (calculated) [5]
56.5554±0.2034  h [6]
0.057 (assumed) [5]
0.075±0.028 [3] [4]
C   [5] [7]
15.147±0.004(R) [6]  ·15.2 [1]  ·15.38±0.05 [7]  ·15.5 [3]  ·15.6 [5]

    40463 Frankkameny (provisional designation 1999 RE44) is a carbonaceous background asteroid from the central region of the asteroid belt, approximately 4 kilometers in diameter. It was discovered on 15 September 1999, by Canadian amateur astronomer Gary Billings at Calgary Observatory ( 681 ) in Alberta, Canada. The asteroid was named after American activist Frank Kameny. [2]

    Contents

    Orbit and classification

    Frankkameny is a non-family from the main belt's background population. It orbits the Sun in the central asteroid belt at a distance of 2.3–3.3  AU once every 4 years and 8 months (1,692 days). Its orbit has an eccentricity of 0.18 and an inclination of 2° with respect to the ecliptic. [1] Frankkameny was first identified as 1997 EJ19 by Spacewatch in 1997, extending the asteroid's observation arc by more than 2 years prior to its discovery observation. [2]

    Physical characteristics

    Frankkameny has been characterized as a carbonaceous C-type asteroid by Pan-STARRS photometric survey. [7]

    Rotation period

    It has a rotation period of 56.6 hours with a brightness variation of 0.51 magnitude, based on a lightcurve obtained in September 2013, from photometric observations made at the Palomar Transient Factory, California ( U=2 ). [6] While not being a slow rotator, Frankkameny's period is far longer than average, and its brightness amplitude is indicative of a non-spheroidal shape.

    Diameter and albedo

    According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Frankkameny measures 3.9 kilometers in diameter and its surface has an albedo of 0.075, [3] [4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 4.2 kilometers. [5]

    Naming

    This minor planet was named in honour of American astronomer and gay rights activist Frank Kameny (1925–2011), by the Minor Planet Center and the International Astronomical Union on 3 July 2012. Frank Kameny was a Harvard-trained variable star astronomer. He died 11 October 2011. [2] [8] [9] [10] [11] [12] The approved naming citation was published by the Minor Planet Center on 3 July 2012 ( M.P.C. 79911). [13]

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    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 40463 Frankkameny (1999 RE44)" (2016-05-04 last obs.). Jet Propulsion Laboratory . Retrieved 28 June 2017.
    2. 1 2 3 4 "40463 Frankkameny (1999 RE44)". Minor Planet Center. Retrieved 17 November 2016.
    3. 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: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
    4. 1 2 3 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: 1109.4096 . Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68.
    5. 1 2 3 4 5 "LCDB Data for (40463) Frankkameny". Asteroid Lightcurve Database (LCDB). Retrieved 17 November 2016.
    6. 1 2 3 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: 1504.04041 . Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75.
    7. 1 2 3 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: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007.
    8. ↑ US: Gay rights campaigner Frank Kameny has asteroid named for him, Pink News , 10 July 2012
    9. ↑ Asteroid between Mars, Jupiter named for US gay rights pioneer Frank Kameny, The Washington Post , July 10, 2012
    10. ↑ Brett Zongker, Asteroid named for gay rights pioneer Frank Kameny, Business Week , July 10, 2012
    11. ↑ Andrew Davis, Canadian names asteroid for Kameny; Anderson Cooper inspires Chinese, Windy City Times , 2012-07-10
    12. ↑ Freya Petersen, Canadian astronomer names asteroid after gay rights activist Archived 15 July 2012 at the Wayback Machine , Alaska Dispatch , July 11, 2012
    13. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 November 2016.
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