Astronomy:3757 Anagolay

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3757 Anagolay
Discovery [1]
Discovered byE. F. Helin
Discovery sitePalomar Obs.
Discovery date14 December 1982
Designations
(3757) Anagolay
Named afterAnagolay
(Philippine mythology)[2]
1982 XB
Minor planet categoryAmor · NEO · PHA [1][2]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc31.62 yr (11,551 days)
|{{{apsis}}}|helion}}2.6522 AU
|{{{apsis}}}|helion}}1.0175 AU
1.8349 AU
Eccentricity0.4455
Orbital period2.49 yr (908 days)
Mean anomaly342.62°
Mean motion0° 23m 47.4s / day
Inclination3.8679°
Longitude of ascending node74.969°
17.149°
Earth MOID0.0386 AU · 15 LD
Physical characteristics
Dimensions0.39 km[3][4]
0.5 km[1]
Rotation period9.0046±0.0013 h[5]
9.012 h[6][7]
Geometric albedo0.18[1]
0.26 (derived)[3]
0.34[4]
Tholen = S [1]
B–V = 0.859±0.012[1]
U–B = 0.522±0.009[1]
Absolute magnitude (H)18.85[4] · 18.95[1] · 19.12±0.06[3][5][8]


3757 Anagolay, provisional designation 1982 XB, is a highly eccentric asteroid, classified as a potentially hazardous asteroid and a near-Earth object of the Amor group, approximately half a kilometer in diameter. It was discovered on 14 December 1982, by American astronomer Eleanor Helin at the Palomar Observatory in California, United States. The asteroid was named after Anagolay from Philippine mythology.[2]

Orbit and classification

Anagolay orbits the Sun in the inner main-belt at a distance of 1.0–2.7 AU once every 2 years and 6 months (908 days). Its orbit has an eccentricity of 0.45 and an inclination of 4° with respect to the ecliptic.[1]

It is a potentially hazardous asteroid because its Earth minimum orbit intersection distance (MOID) is less than 0.05 AU and its diameter is greater than 150 meters. Its Earth-MOID is 0.0386 AU (5,770,000 km) which corresponds to 15 lunar distances. Its orbit is well-determined for the next several hundred years.[1] The body's observation arc begins in 1986, as no precoveries and no identifications prior to its discovery were made.[2]

Physical characteristics

In the Tholen classification, Anagolay is a silicaceous S-type asteroid.[1]

Based on two rotational lightcurves obtained in the 1980s, Anagolay has a rotation period of 9.012 hours and a brightness variation of 0.20 and 0.21 in magnitude, respectively ({{{1}}}).[6][7] A third lightcurve, also from the 1980s, gave an alternative period of 9.0046±0.0013 hours with an amplitude of 0.14 ({{{1}}}).[5] The body's albedo lies between 0.18 and 0.34,[1][4] with the Collaborative Asteroid Lightcurve Link (CALL) deriving an intermediate albedo of 0.26. CALL also assumes a diameter of 390 meters.[3]

Naming

This minor planet was named after Anagolay, the goddess of the lost things worshipped by pre-Hispanic Tagalogs. In Philippine mythology, Anagolay is the daughter of the hermaphroditic agricultural deity Lakampati (also goddess Ikapati).[9]

The name, suggested by Filipino student Mohammad Abqary Alon, was selected among 85 other suggestions in a contest held by the Space Generation Advisory Council's "Name-An-Asteroid" campaign.[2][10] The official naming citation was published by the Minor Planet Center on 9 September 2014 (M.P.C. 89832).[11]

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 "JPL Small-Body Database Browser: 3757 Anagolay (1982 XB)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003757. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 "3757 Anagolay (1982 XB)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=3757. 
  3. ↑ 3.0 3.1 3.2 3.3 "LCDB Data for (3757) Anagolay". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=3757%7CAnagolay. 
  4. ↑ 4.0 4.1 4.2 4.3 Harris, Alan W. (February 1998). "A Thermal Model for Near-Earth Asteroids". Icarus 131 (2): 291–301. doi:10.1006/icar.1997.5865. Bibcode: 1998Icar..131..291H. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1998Icar..131..291H. Retrieved 30 May 2016. 
  5. ↑ 5.0 5.1 5.2 Harris, A. W.; Young, J. W.; Bowell, E.; Tholen, D. J. (November 1999). "Asteroid Lightcurve Observations from 1981 to 1983". Icarus 142 (1): 173–201. doi:10.1006/icar.1999.6181. Bibcode: 1999Icar..142..173H. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1999Icar..142..173H. Retrieved 30 May 2016. 
  6. ↑ 6.0 6.1 Harris, A. W.; Young, J. W. (June 1985). "Photometric Results for Earth Approaching Asteroids.". Bulletin of the American Astronomical Society 17: 726. Bibcode: 1985BAAS...17R.726H. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1985BAAS...17R.726H. Retrieved 30 May 2016. 
  7. ↑ 7.0 7.1 Binzel, R. P. (October 1987). "A photoelectric survey of 130 asteroids". Icarus 72 (1): 135–208. doi:10.1016/0019-1035(87)90125-4. ISSN 0019-1035. Bibcode: 1987Icar...72..135B. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=1987Icar...72..135B. Retrieved 30 May 2016. 
  8. ↑ Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus 221 (1): 365–387. doi:10.1016/j.icarus.2012.07.026. Bibcode: 2012Icar..221..365P. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012Icar..221..365P. Retrieved 30 May 2016. 
  9. ↑ "An Ultimate Guide To Philippine Mythology's Legendary Deities". 2018. https://filipiknow.net/philippine-mythology-gods-and-goddesses/#8_Anagolay. 
  10. ↑ Montenegro, Bea (9 October 2014). "New asteroid named after Philippine goddess of lost things". http://www.gmanetwork.com/news/story/382869/scitech/science/new-asteroid-named-after-philippine-goddess-of-lost-things. 
  11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 

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