astro.wikisort.org - Asteroid

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]

40463 Frankkameny

Discovery [1]
Discovered by	G. W. Billings
Discovery site	Calgary Obs. (681)
Discovery date	15 September 1999
Designations
MPC designation	(40463) Frankkameny
Named after	Frank Kameny (gay rights activist)[2]
Alternative designations	1999 RE44 · 1997 EJ19
Minor planet category	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
Semi-major axis	2.7786 AU
Eccentricity	0.1808
Orbital period (sidereal)	4.63 yr (1,692 days)
Mean anomaly	338.05°
Mean motion	0° 12m 46.08s / day
Inclination	2.4415°
Longitude of ascending node	302.75°
Argument of perihelion	32.248°
Physical characteristics
Mean diameter	3.855±0.638 km[3][4] 4.23 km (calculated)[5]
Synodic rotation period	56.5554±0.2034 h[6]
Geometric albedo	0.057 (assumed)[5] 0.075±0.028[3][4]
Spectral type	C [5][7]
Absolute magnitude (H)	15.147±0.004 (R)[6] · 15.2[1] · 15.38±0.05[7] · 15.5[3] · 15.6[5]

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]

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 40463 Frankkameny at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 40463 Frankkameny at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (40463) Frankkameny

(40463) Frankkameny ist ein Asteroid des mittleren Hauptgürtels, der am 15. September 1999 vom kanadischen Geophysiker und Amateurastronomen Gary Billings von Calgary (IAU-Code 681) aus entdeckt wurde. Unbestätigte Sichtungen des Asteroiden hatte es vorher schon am 3. und 11. März 1997 an der auf dem Kitt Peak gelegenen Außenstation des Steward Observatory gegeben.[1]

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- [en] 40463 Frankkameny

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