163 Erigone
{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet=yes
| name=163 Erigone
|image= 000163-asteroid shape model (163) Erigone.png
|caption= 3D convex shape model of 163 Erigone| background=#D6D6D6
| discovery_ref=
| discoverer=J. Perrotin
| discovery_site=Toulouse
| discovered=26 April 1876
| mpc_name=(163) Erigone
| alt_names=A876 HC; 1892 RA;
1957 OT; {{mp|2017 YH|23}}
| pronounced={{IPAc-en|ᵻ|'|r|ɪ|g|ə|n|iː}}Noah Webster (1884) A Practical Dictionary of the English Language
| adjective=Erigonian {{IPAc-en|ɛ|r|ᵻ|'|g|oʊ|n|i|ə|n}}Publius Ovidius Naso, John Gower (1640) Ovids Festivalls Erigonean {{IPAc-en|ɛ|r|ᵻ|g|ə|'|n|iː|ə|n}}
| named_after=Erigone
| mp_category=Main belt (Erigone)
| orbit_ref={{Cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=163;cad=1 |title=163 Erigone |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=12 May 2016}}
| epoch=31 July 2016 (JD 2457600.5)
| semimajor={{Convert|2.3675|AU|Gm|abbr=on}}
| perihelion={{Convert|1.9161|AU|Gm|abbr=on}}
| aphelion={{Convert|2.8188|AU|Gm|abbr=on|lk=on}}
| eccentricity=0.19064
| inclination=4.8148°
| asc_node=160.166°
| arg_peri=298.260°
| mean_anomaly=280.031°
| avg_speed=
| dimensions={{val|72.63|5.7|ul=km}}
72.70 ± 1.95 km
| mass={{nowrap|(2.01 ± 0.68) × 1018 kg}}
| surface_grav=
| escape_velocity=
| rotation={{Convert|16.136|h|d|abbr=on|lk=on}}
| magnitude=
| albedo={{val|0.0546|0.010}}
0.0428 ± 0.0092
| single_temperature=
| mean_motion={{Deg2DMS|0.27057|sup=ms}} / day
| observation_arc=123.56 yr (45131 d)
| uncertainty=0
| moid={{Convert|0.93686|AU|Gm|abbr=on}}
| jupiter_moid={{Convert|2.3628|AU|Gm|abbr=on}}
| tisserand=3.518
}}
163 Erigone is an asteroid from the asteroid belt and the namesake of the Erigone family of asteroids that share similar orbital elements and properties. It was discovered by French astronomer Henri Joseph Perrotin on April 26, 1876, and named after one of the two Erigones in Greek mythology. This asteroid is orbiting the Sun at a distance of {{Val|2.37|ul=AU}} with a period of {{Convert|1330.5|days|years|abbr=off|disp=out}} and an eccentricity (ovalness) of 0.19. The orbital plane is inclined at an angle of 4.8° to the plane of the ecliptic.
Photometric measurements taken in 2014 were used to construct a lightcurve that demonstrated a rotation period of {{val|16.136|0.001|u=hours}} with an amplitude of {{val|0.32|0.02}} in magnitude. Erigone is a relatively large and dark asteroid with an estimated size of 73 km. Based upon its spectrum, it is classified as a C-type asteroid, which indicates that it probably has a carbonaceous composition. It is the largest member of the eponymously named Erigone collisional family.
2014 occultation of Regulus
In the early morning hours of March 20, 2014, Erigone occulted the first-magnitude star Regulus, as first predicted by Aldo Vitagliano in 2004 using the SOLEX software. This would have been a rare case of an occultation of a very bright star visible from a highly populated area, since the shadow path moved across New York state and Ontario, including all five boroughs of New York City. Observers in the shadow path would have seen the star wink out for as long as 14 seconds.
However, thick clouds and rain blocked the view for most if not all people on the shadow path.[http://www.space.com/25141-rare-asteroid-star-eclipse-rained-out.html Asteroid eclipse rained out] Space.com 2014 March 20 The website of the International Occultation Timing Association does not list any successful observations at all.[http://www.occultations.org/Regulus2014 Regulus 2014] {{Webarchive|url=https://web.archive.org/web/20201121183357/http://occultations.org/Regulus2014/ |date=21 November 2020 }} International Occultation Timing Association
Two single chord Asteroid Occultation events have been observed, in 2013 and 2015.{{Cite web|url=https://sbn.psi.edu/pds-staging/resource/occ.html|title=PDS Asteroid/Dust Subnode|website=sbn.psi.edu|language=en|access-date=2018-04-25|archive-url=https://web.archive.org/web/20180425115705/https://sbn.psi.edu/pds-staging/resource/occ.html|archive-date=2018-04-25|url-status=dead}}
References
{{Reflist|refs=
| title=Rotation Period Determination for 163 Erigone
| display-authors=1 | last1=Pilcher | first1=Frederick
| last2=Briggs | first2=John W. | last3=Martinez | first3=Luis
| last4=Odden | first4=Caroline | last5=Aggarwal | first5=Ashok
| journal=Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers
| volume=41 | issue=3 | page=187 | date=July 2014
| bibcode=2014MPBu...41..187P }}
| first1 = B.
| last1 = Carry
| title = Density of asteroids
| journal = Planetary and Space Science
| volume = 73
| issue = 1
| pages = 98–118
|date=December 2012
| doi = 10.1016/j.pss.2012.03.009
| bibcode = 2012P&SS...73...98C
| postscript= .
|arxiv = 1203.4336}} See Table 1.
| last1 = Pravec
| first1 = P.
| last2 = Harris
| first2 = A. W.
| last3 = Kusnirak
| first3 = P.
| last4 = Galad
| first4 = A.
| last5 = Hornoch
| first5 = K.
| display-authors = 1
| title = Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations
| volume = 1667
| work = Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan
| issue = 1667
| pages = 6089
|date=May 2012
| bibcode = 2012LPICo1667.6089P
| postscript= .}} See Table 4.
|year = 2006
|title = The International Occultation Timing Association 24th Annual Meeting at Mt. Cuba Observatory, Greenville, Delaware
|publisher = International Occultation Timing Association
|first = David
|last = Dunham
|url = http://www.weblore.com/richard/IOTAMeeting2006.htm
|accessdate = 2011-02-13
|url-status = dead
|archiveurl = https://web.archive.org/web/20110718013258/http://www.weblore.com/richard/IOTAMeeting2006.htm
|archivedate = 2011-07-18
}}
|year=2010
|title=The Solex Page
|publisher=Università degli Studi di Napoli Federico II
|first=Aldo
|last=Vitagliano
|url=http://chemistry.unina.it/~alvitagl/solex/
|accessdate=2011-02-13
|url-status=dead
|archiveurl=https://web.archive.org/web/20081220235836/http://chemistry.unina.it/~alvitagl/solex/
|archivedate=2008-12-20
}}
|date = 2014-03-14
|title = (163) Erigone / HIP 49669
|publisher = Asteroid Occultation
|first = Steve
|last = Preston
|url = http://www.asteroidoccultation.com/2014_03/0320_163_32317_Summary.txt
|accessdate = 2014-03-14
|url-status = dead
|archiveurl = https://web.archive.org/web/20131224171236/http://www.asteroidoccultation.com/2014_03/0320_163_32317_Summary.txt
|archivedate = 2013-12-24
}}
| title=Compositional study of asteroids in the Erigone collisional family using visible spectroscopy at the 10.4 m GTC
| last1=Morate | first1=David | last2=de León | first2=Julia
| last3=De Prá | first3=Mário | last4=Licandro | first4=Javier
| last5=Cabrera-Lavers | first5=Antonio | last6=Campins | first6=Humberto
| last7=Pinilla-Alonso | first7=Noemí | last8=Alí-Lagoa | first8=Víctor
| display-authors=1 | journal=Astronomy and Astrophysics
| date=February 2016 | volume=586 | id=A129 | pages=18
| doi=10.1051/0004-6361/201527453 | arxiv=1701.03761
| bibcode=2016A&A...586A.129M | postscript=. }}
}}
External links
- {{AstDys|163}}
- {{JPL small body}}
{{Minor planets navigator |162 Laurentia |number=163 |164 Eva}}
{{Small Solar System bodies}}
{{2014 in space}}
{{Authority control}}
{{DEFAULTSORT:000163}}
Category:C-type asteroids (Tholen)
Category:Ch-type asteroids (SMASS)