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3103 Eger

{{Short description|Apollo asteroid}}

{{Use dmy dates|date=October 2019}}

{{Infobox planet

| minorplanet = yes

| background = #FFC2E0

| image = 003103-asteroid shape model (3103) Eger.png

| image_scale =

| caption = Shape model of Eger from its lightcurve

| name = 3103 Eger

| discoverer = M. Lovas

| discovered = 20 January 1982

| discovery_site = Piszkéstető

| mpc_name = (3103) Eger

| alt_names = 1982 BB

| named_after = Eger

| mp_category = {{Ubl

| Apollo

| Mars crosser

}}

| orbit_ref = {{Cite SBDB|title=3103 Eger|id=3103|access-date=14 April 2016}}

| epoch = 13 January 2016 (JD 2457400.5)

| uncertainty = 0

| observation_arc = 12495 days (34.21 yr)

| semimajor = {{Convert|1.4044|AU|Gm|abbr=on}}

| perihelion = {{Convert|0.90673|AU|Gm|abbr=on}}

| aphelion = {{Convert|1.9021|AU|Gm|abbr=on|lk=on}}

| eccentricity = 0.35437

| period = 1.66 yr (607.90 d)

| inclination = 20.931°

| asc_node = 129.792°

| arg_peri = 254.007°

| mean_motion = {{Deg2DMS|0.59220|sup=ms}} / day

| mean_anomaly = 208.62°

| p_orbit_ref = {{cite web |url=https://newton.spacedys.com/neodys/index.php?pc=1.1.0&n=162058 |title=(162058) 1997AE12 |publisher=University of Pisa |work=NEODyS |access-date=25 November 2015}}

| p_eccentricity = 0.325

| p_inclination = 22.364°

| p_mean_motion = 99.460

| moid = {{Convert|0.0778981|AU|Gm|abbr=on}}

| mean_diameter = 1.5 km

| rotation = {{Val|5.710156|0.000007|u=h}}

| spectral_type = E

| albedo = 0.64

| abs_magnitude = 15.38

}}

3103 Eger is an Apollo and Mars-crosser asteroid that was discovered in 1982, by Miklós Lovas. It was named after the city of Eger, Hungary. It has an albedo of 0.64, making it a highly reflective asteroid.

Description

File:3103Eger (Lightcurve Inversion).png-based 3D-model of Eger]]

It has made and will continue to make many close approaches to Earth. Its closest approach occurred on 6 August 1996, when the asteroid passed {{convert|0.11509|AU|Gm|abbr=on}} from Earth. The observed YORP value is {{Val|1.4e−8|0.6|u=rad d−2}}.

3103 Eger is the only asteroid besides 4 Vesta identified as the parent body for specific meteorites. 4 Vesta is the parent body for Howardite, Eucrite, and Diogenite meteorites, while 3103 Eger is the parent body for Aubrite meteorites. In this characteristic 3103 Eger is related spectroscopically to the 434 Hungaria type asteroids, which are a Hirayama-family of orbital types, and E-type asteroids which form a spectroscopical type.

See also

References

{{reflist|refs=

{{Cite journal

| display-authors=6 | first1=J. | last1=Durech

| first2=D. | last2=Vokrouhlický | first3=A. R. | last3=Baransky

| first4=S. | last4=Breiter | first5=O. A. | last5=Burkhonov

| first6=W. | last6=Cooney | first7=V. | last7=Fuller

| first8=N. M. | last8=Gaftonyuk | first9=J. | last9=Gross

| first10=R. Ya. | last10=Inasaridze | first11=M. | last11=Kaasalainen

| first12=Yu. N. | last12=Krugly | first13=O. I. | last13=Kvaratshelia

| first14=E. A. | last14=Litvinenko | first15=B. | last15=Macomber

| first16=F. | last16=Marchis | first17=I. E. | last17=Molotov

| first18=J. | last18=Oey | first19=D. | last19=Polishook

| first20=J. | last20=Pollock | first21=P. | last21=Pravec

| first22=K. | last22=Sárneczky | first23=V. G. | last23=Shevchenko

| first24=I. | last24=Slyusarev | first25=R. | last25=Stephens

| first26=Gy. | last26=Szabó | first27=D. | last27=Terrell

| first28=F. | last28=Vachier | first29=Z. | last29=Vanderplate

| first30=M. | last30=Viikinkoski | first31=B. D. | last31=Warner

| title=Analysis of the rotation period of asteroids (1865) Cerberus, (2100) Ra-Shalom, and (3103) Eger - search for the YORP effect

| journal=Astronomy and Astrophysics

| volume=547 | page=9 | date=November 2012

| bibcode=2012A&A...547A..10D | doi=10.1051/0004-6361/201219396 |arxiv = 1210.2219 }}

}}

External links

  • [http://www.lpi.usra.edu/books/AsteroidsIII/pdf/3024.pdf Mineralogy of Asteroids]
  • [http://adsabs.harvard.edu/abs/1992Icar..100...95G Relation between E-asteroids, 3103 Eger and 434 Hungaria]
  • [http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/full/2007/41/aa8411-07/aa8411-07.right.html Relations between E-type asteroids 2867 Šteins, a target of the Rosetta mission, and 3103 Eger]
  • [http://www.asu.cas.cz/~ppravec/eger.htm 3103 Eger in the Ondrejov NEO program]
  • [https://web.archive.org/web/20160303201658/http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/22732/1/97-1257.pdf Benner, et al. - Radar Detection of Near-Earth Asteroids 2062 Aten, 2101 Adonis, 3103 Eger, 4544 Xanthus, and 1992 QN (1997)]
  • {{NeoDys|3103}}
  • {{ESA-SSA|3103|Eger}}
  • {{JPL small body}}

{{Minor planets navigator |3102 Krok |number=3103 |3104 Durer}}

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003103

Category:Named minor planets

003103

Category:Earth-crossing asteroids

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