{{Short description|Main-belt asteroid}} {{Use dmy dates|date=October 2019}} {{Infobox planet | minorplanet = yes | image = 202 Chryseïs.png | caption = Lightcurve-base 3D-model of 202 Chryseïs. | background = #D6D6D6 | name = 202 Chryseïs | discoverer = C. H. F. Peters | discovered = 11 September 1879 | mpc_name = (202) Chryseïs | alt_names = A879 RA, A901 TA<br/>1935 BL | pronounced = {{IPAc-en|k|r|aɪ|ˈ|s|iː|ᵻ|s}}<ref>Noah Webster (1884) ''A Practical Dictionary of the English Language''</ref> | named_after = Chryseis | mp_category = Main belt | epoch = 31 July 2016 (JD 2457600.5) | semimajor = {{Convert|3.0713|AU|Gm|abbr=on}} | perihelion = {{Convert|2.7567|AU|Gm|abbr=on}} | aphelion = {{Convert|3.3859|AU|Gm|abbr=on|lk=on}} | eccentricity = 0.10244 | period = 5.38 yr (1966.0 d) | inclination = 8.8535° | asc_node = 136.848° | arg_peri = 1.3159° | mean_anomaly = 11.1527° | avg_speed = 16.99 km/s | dimensions = {{val|86.15|2.4|ul=km}} | mass = | density = | rotation = {{Convert|23.670|h|d|abbr=on|lk=on}}<ref name="jpldata"/><br />23.670 ± 0.001 h<ref name="aaa555_A104"/> | spectral_type = S | abs_magnitude = 7.42 | albedo = {{val|0.2562|0.015}} | single_temperature = | mean_motion = {{Deg2DMS|0.18311|sup=ms}} / day | orbit_ref = <ref name="jpldata">{{Cite web |url=https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=20000202 |title=202 Chryseis |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=12 May 2016}}</ref> | observation_arc = 136.57 yr (49881 d) | uncertainty = 0 }}

'''202 Chryseïs''' is a large, lightly coloured main belt asteroid that is probably composed of silicate rocks. It was discovered by C. H. F. Peters on September 11, 1879, in Clinton, New York, and was named after the mythical Trojan woman Chryseis. 202 Chryseïs is orbiting the Sun with a semimajor axis of {{Val|3.07|ul=AU}} and an eccentricity of 0.102, which brings it as close to the Sun as {{Val|2.76|u=AU}} and as far away as {{Val|3.39|u=AU}} during the course of its 5.38&nbsp;year orbital period. The orbital plane is inclined at an angle of 8.85° relative to the plane of the ecliptic.<ref name="jpldata"/>

The rotation period for this asteroid is close to a day long, so the construction of a complete light curve requires photometric observations from multiple locations at widely spaced latitudes. This task was completed in January and February, 2011, yielding a synodic rotation period of 23.670 ± 0.001 h, with a brightness variation of 0.20 ± 0.02 in magnitude.<ref name="aaa555_A104"/> This is a stony, S-type asteroid. Based on infrared observations, it has a diameter of 86.15{{±|2.4}}&nbsp;km.<ref name="jpldata"/>

==References== <references>

<ref name="aaa555_A104">{{citation | display-authors=1 | last1=Stephens | first1=Robert D. | last2=Pilcher | first2=Frederick | last3=Hamanowa | first3=Hiromi | last4=Hamanowa | first4=Hiroko | last5=Ferrero | first5=Andrea | title=The Lightcurve for 202 Chryseis | journal=The Minor Planet Bulletin | volume=38 | issue=4 | pages=208&ndash;209 | date=October 2011 | bibcode=2011MPBu...38..208S | postscript=. }}</ref>

</references> <!-- end of reflist -->

== External links == * [http://ftp.lowell.edu/pub/elgb/astorb.html The Asteroid Orbital Elements Database] * [https://archive.today/20060614093519/http://www.psi.edu/pds/archive/lc.html Asteroid Lightcurve Parameters] * [https://web.archive.org/web/20041205000314/http://www.psi.edu/pds/archive/albedo.html Asteroid Albedo Compilation] * {{AstDys|202}} * {{JPL small body}}

{{Minor planets navigator |201 Penelope |number=202 |203 Pompeja}} {{Small Solar System bodies}} {{Authority control}}

{{DEFAULTSORT:Chryseis}} 000202 Category:Discoveries by Christian Peters Category:Named minor planets 000202 18790911

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