8776 Campestris

8776 Campestris
Discovery [1]
Discovered by C. J. van Houten
I. van Houten
T. Gehrels
Discovery site Palomar Obs.
Discovery date 16 October 1977
Designations
MPC designation 8776 Campestris
Named after
 Anthus campestris
(endangered bird)[2]
2287 T-3 · 1990 SO10
main-belt · (middle) [3]
Orbital characteristics [1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 38.34 yr (14,003 days)
Aphelion 3.2400 AU
Perihelion 2.1393 AU
2.6896 AU
Eccentricity 0.2046
4.41 yr (1,611 days)
320.24°
Inclination 3.4404°
300.28°
338.85°
Physical characteristics
Dimensions 10.543±0.106 km[4]
7.65 km (calculated)[3]
9.2982±0.0118 h[3]
9.2990±0.0064 h[5]
0.0577±0.0082[4]
0.10 (assumed)[3]
S [3]
13.7[1][3]
13.6[4]
14.122±0.002 (S)[5]
13.734±0.002 (R)[5]

    8776 Campestris, provisional designation 2287 T-3, is a stony asteroid from the middle region of the asteroid belt, about 10 kilometers in diameter. It was discovered on 16 October 1977, by Dutch astronomer couple Cornelis and Ingrid van Houten at Leiden Observatory, and Dutch–American astronomer Tom Gehrels at the U.S Palomar Observatory in California.[6]

    The S-type asteroid orbits the Sun at a distance of 2.1–3.2 AU once every 4 years and 5 months (1,611 days). Its orbit has an eccentricity of 0.20 and an inclination of 3° with respect to the ecliptic.[1]

    In 2009, two photometric light-curve analysis at the U.S Palomar Transient Factory, California, gave it a rotation period of 9.2982±0.0118 and 9.2990±0.0064 hours with a brightness amplitude of 0.35 and 0.38 in magnitude, respectively (U=2).[5] According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 10.5 kilometers in diameter and its surface has an albedo of 0.058.[4] The Collaborative Asteroid Lightcurve Link (CALL) assumes a higher albedo of 0.10 and calculates a diameter of 7.5 kilometers.[3]

    The special designation T-3 stands for the third Palomar–Leiden Trojan survey, named after the fruitful collaboration of the Palomar and Leiden Observatory in the 1960s and 1970s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Cornelis and Ingrid van Houten-Groeneveld at Leiden Observatory where astrometry was carried out. The trio of astronomers are credited with the discovery of 4,619 minor planets.[7]

    The minor planet is named for the passerine bird Anthus campestris, or tawny pipit. It is on the Dutch Red List of birds endangered in the Netherlands.[2] It is also on the European Red List of Birds as of 2015.[8]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 8776 Campestris (2287 T-3)" (2016-02-08 last obs.). Jet Propulsion Laboratory. Retrieved March 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (8776) Campestris. Springer Berlin Heidelberg. p. 665. ISBN 978-3-540-00238-3. Retrieved March 2016.
    3. 1 2 3 4 5 6 7 "LCDB Data for (8776) Campestris". Asteroid Lightcurve Database (LCDB). Retrieved March 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 March 2016.
    5. 1 2 3 4 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. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved March 2016.
    6. ↑ "8776 Campestris (2287 T-3)". Minor Planet Center. Retrieved March 2016.
    7. ↑ "Minor Planet Discoverers". Minor Planet Center. 24 February 2016. Retrieved March 2016.
    8. ↑ "European Red List of Birds" (PDF). BirdLife International. 2015. p. 56. Retrieved March 2016.

    External links


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