1181 Lilith

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1181 Lilith
Discovery [1]
Discovered by B. Jekhovsky
Discovery site Algiers Obs.
Discovery date 11 February 1927
Designations
MPC designation 1181 Lilith
Named after
Lili Boulanger
(French composer)[2]
1927 CQ · 1925 QF
1943 WC · 1953 CA
1964 PG · A914 BA
main-belt · (middle)[3]
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 85.90 yr (31,375 days)
Aphelion 3.1867 AU
Perihelion 2.1393 AU
2.6630 AU
Eccentricity 0.1967
4.35 yr (1,587 days)
307.30°
0° 13m 36.48s / day
Inclination 5.6027°
260.71°
156.15°
Physical characteristics
Dimensions 20.492±0.276[4]
22.133±0.254 km[5]
24.18 km (calculated)[3]
15.04±0.01 h[6]
0.0910±0.0157[5]
0.10 (assumed)[3]
0.106±0.011[4]
SMASS = X[1] · P[5] · X[3]
11.2[1][3] · 11.5[5] · 11.56±0.52[7]

1181 Lilith, provisional designation 1927 CQ, is a dark asteroid from the middle region of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on February 11, 1927, by Russian–French astronomer Benjamin Jekhowsky at Algiers Observatory in Algeria, Northern Africa.[8]

The X-type asteroid is also classified as a P-type by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer.[5] The asteroid orbits the Sun at a distance of 2.1–3.2 AU once every 4 years and 4 months (1,587 days). Its orbit has an eccentricity of 0.20 and an inclination of 6° with respect to the ecliptic.[1] First identified as A914 BA at Crimea-Simeis in 1914, while the asteroid's Lilith's first used observation was made at Konkoly Observatory in 1934, so its observation arc begins 7 years after its official discovery observation.[8]

In February 2014, a rotational light-curve was obtained by Italian astronomer Andrea Ferrero at the Bigmuskie Observatory (B88) in Mombercelli, Italy. The photometric observations rendered a period of 15.04±0.01 hours with a brightness amplitude of 0.11 in magnitude (U=2).[6] According to NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Lilith measures between 20.5 and 22.1 kilometers in diameter, and its surface has an albedo between 0.09 and 0.10,[4][5] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10, and calculates a diameter of 24.2 kilometers based on an absolute magnitude of 11.2.[1]

The minor planet was named by the discoverer for French composer Marie-Juliette Olga Lili Boulanger (1893–1918), after younger sister of the noted conductor and composer, Nadia Boulanger. Her byname "Lili" originates from Lilith, Adam's first wife in Jewish mythology (H 110).[2]

References[edit]

  1. ^ a b c d e f "JPL Small-Body Database Browser: 1181 Lilith (1927 CQ)" (2016-11-11 last obs.). Jet Propulsion Laboratory. Retrieved 9 December 2016. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1181) Lilith. Springer Berlin Heidelberg. p. 99. ISBN 978-3-540-00238-3. Retrieved 25 May 2016. 
  3. ^ a b c d e "LCDB Data for (1181) Lilith". Asteroid Lightcurve Database (LCDB). Retrieved 25 May 2016. 
  4. ^ a b c 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. arXiv:1406.6645Freely accessible. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 9 December 2016. 
  5. ^ a b c d e f 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 25 May 2016. 
  6. ^ a b Ferrero, Andrea (July 2014). "Period Determination of Six Main Belt Asteroids". The Minor Planet Bulletin. 41 (3): 184–185. Bibcode:2014MPBu...41..184F. ISSN 1052-8091. Retrieved 25 May 2016. 
  7. ^ 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 25 May 2016. 
  8. ^ a b "1181 Lilith (1927 CQ)". Minor Planet Center. Retrieved 25 May 2016. 

External links[edit]