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Encyclopedia > 15 Eunomia
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15 Eunomia
Discovery A
Discoverer Annibale de Gasparis
Discovery date July 29, 1851
Alternate
designations
none B
Category Main belt, Eunomia family
Orbital elements C
Epoch October 22, 2004 (JD 2453300.5)
Eccentricity (e) 0.186
Semi-major axis (a) 395.872 Gm (2.646 AU)
Perihelion (q) 322.290 Gm (2.154 AU)
Aphelion (Q) 469.453 Gm (3.138 AU)
Orbital period (P) 1572.323 d (4.30 a)
Mean orbital speed 18.15 km/s
Inclination (i) 11.732°
Longitude of the
ascending node
(Ω)
293.399°
Argument of
perihelion
(ω)
97.577°
Mean anomaly (M) 148.829°
Physical characteristics
Dimensions 255.3 km
Mass 8.4×1018 kg
Density 0.96 g/cm³ 1
Surface gravity 0.0343 m/s²
Escape velocity 0.0935 km/s
Rotation period 0.2535 d (6.083 h) 2
Spectral class S-type asteroid
Absolute magnitude 5.28
Albedo 0.209 3
Mean surface
temperature
~166 K

15 Eunomia (ew-noh'-mee-a) is the 12th largest Main belt asteroid. It is also the largest member of the Eunomia family of asteroids. Like other true members of the family, it is composed of silicates and nickel-iron. It is light in colour. Annibale de Gasparis (April 9, 1819 – March 21, 1892) was an Italian astronomer. ... Jump to: navigation, search July 29 is the 210th day (211th in leap years) of the year in the Gregorian Calendar, with 155 days remaining. ... Jump to: navigation, search 1851 was a common year starting on Wednesday (see link for calendar). ... The provisional designation of comets and asteroids are similar to each other: they both follow a pattern set in 1925 by the Minor Planet Center of the IAU. Historical designations At first, astronomers strove to assign symbols to the minor planets: 1 Ceres a stylized sickle 2 Pallas a lozenge... Jump to: navigation, search Minor planets, or planetoids are minor bodies of the Solar system orbiting the Sun (or of other planetary systems orbiting other stars) that are larger than meteoroids (the largest of which might be taken to be around 10 meters or so across) but smaller than major... The asteroid belt is a region of the solar system falling roughly between the planets Mars and Jupiter where the greatest concentration of asteroid orbits can be found. ... The Eunomia family is a group of several hundred asteroids that share similar orbital and spectral properties. ... In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... Jump to: navigation, search October 22 is the 295th day of the year (296th in leap years) in the Gregorian Calendar, with 70 days remaining. ... Jump to: navigation, search 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... Jump to: navigation, search The Julian day or Julian day number (JDN) is the number of days that have elapsed since 12 noon Greenwich Mean Time (UT or TT) on Monday, January 1, 4713 BC in the proleptic Julian calendar . ... In astrodynamics, under standard assumptions any orbit must be of conic section shape. ... In geometry, the semi-major axis (also semimajor axis) a applies to ellipses and hyperbolas. ... Giga (symbol: G) is a prefix in the SI system of units denoting 109, or 1 000 000 000. ... Jump to: navigation, search The metre or (in American English) meter (symbol: m) is the SI base unit of length. ... Jump to: navigation, search The astronomical unit (AU or au or a. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... This article is about several astronomical terms (apogee & perigee, aphelion & perihelion, generic equivalents based on apsis, and related but rarer terms. ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ... See also Day (language) A day (symbol: d) is a unit of time. ... A Julian year is the length of an average year in the Julian calendar, 365. ... Jump to: navigation, search The orbital speed of a body, generally a planet, a natural satellite, an artificial satellite, or a multiple star, is the speed at which it orbits around the barycenter of a system, usually around a more massive body. ... Jump to: navigation, search The second (symbol: s) is the SI base unit of time. ... Inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit and is the angular distance of the orbital plane from the plane of the reference (usually planets equator or the ecliptic), stated in degrees. ... A degree (in full, a degree of arc), usually symbolized °, is a measurement of plane angle, representing 1/360 of a full rotation. ... The Longitude of the ascending node () is one of the orbital elements used to specify the orbit of an object in space. ... The argument of the perihelion is one of the orbital elements describing the orbit of a planet. ... In the study of orbital dynamics the mean anomaly is a measure of time, specific to the orbiting body p, which is a multiple of 2π radians at and only at periapsis. ... Jump to: navigation, search Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ... Jump to: navigation, search The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... Jump to: navigation, search Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... A cubic centimetre (cm3) is an SI derived unit of volume, equal to the volume of a cube with side length of 1 centi metre. ... Jump to: navigation, search It has been suggested that Gravitational constant be merged into this article or section. ... Jump to: navigation, search In physics, for a given gravitational field and a given position, the escape velocity is the minimum speed an object without propulsion, at that position, needs to have to move away indefinitely from the source of the field, as opposed to falling back or staying in... In astronomy, a rotation period is the time an astronomical object takes to complete one revolution around its rotation axis. ... The hour (symbol: h) is a unit of time. ... Asteroids are assigned a type based on spectral shape, color, and sometimes albedo. ... Approximately 17% of all known asteroids are of an S-type (for stony) composition. ... Jump to: navigation, search In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standardized distance away. ... Jump to: navigation, search The albedo is a measure of reflectivity of a surface or body. ... Temperature is the physical property of a system which underlies the common notions of hot and cold; the material with the higher temperature is said to be hotter. ... Jump to: navigation, search The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ... The asteroid belt is a region of the solar system falling roughly between the planets Mars and Jupiter where the greatest concentration of asteroid orbits can be found. ... Jump to: navigation, search An asteroid is a small, solid object in our Solar System, orbiting the Sun. ... The Eunomia family is a group of several hundred asteroids that share similar orbital and spectral properties. ... In chemistry, a silicate is a compound consisting of silicon and oxygen (SixOy), one or more metals, and possibly hydrogen. ... Jump to: navigation, search General Name, Symbol, Number nickel, Ni, 28 Chemical series transition metals Group, Period, Block 10, 4, d Appearance lustrous, metallic Atomic mass 58. ... Jump to: navigation, search General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ...


It was discovered by A. de Gasparis on July 29, 1851 and named after Eunomia, one of the Horae (Hours), a personification of order and law in Greek mythology. Annibale de Gasparis (April 9, 1819 – March 21, 1892) was an Italian astronomer. ... Jump to: navigation, search July 29 is the 210th day (211th in leap years) of the year in the Gregorian Calendar, with 155 days remaining. ... Jump to: navigation, search 1851 was a common year starting on Wednesday (see link for calendar). ... In Greek mythology, the Horae (hours) were the three goddesses controlling orderly life. ... Jump to: navigation, search In Greek mythology, the Horae (Latin) or Horai (Greek; both words mean the hours) were the three goddesses controlling orderly life. ... Aphorism Critical legal studies Jurisprudence Law (principle) Legal research Letter versus Spirit List of legal abbreviations Legal code Natural justice Natural law Philosophy of law Religious law External links Find more information on Law by searching one of Wikipedias sibling projects: Wikibooks Wikiversity has more about this subject: School... Jump to: navigation, search Greek mythology comprises the collected narratives of Greek gods, goddesses, heroes, and heroines, originally created and spread within an oral-poetic tradition. ...


Eunomia has rather variable lightcurve indicating an elongated object. This led to a suggestion that Eunomia may be a binary object. However, it was refuted later. [1] The term binary asteroid refers to a system in which two asteroids orbit their common centre of gravity, in analogy with binary stars. ...


Eunomia has been observed occulting stars three times. In this July, 1997 still frame captured from video, the bright star Aldebaran has just reappeared on the dark limb of the waning crescent moon in this predawn occultation. ... Jump to: navigation, search The Pleiades star cluster A star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. ...


Eunomia in fiction

One chapter of Arkady and Boris Strugatsky's novel Space Apprentice (1962) is staged on Eunomia. A scientific station on the asteroid is annihilating large fragments of the asteroid in its advanced experiments. ... Jump to: navigation, search 1962 was a common year starting on Monday (link will take you to calendar). ...


Appearance

Stationary, retrograd Opposition Minimum distance Maximum brightness Stationär, prograde Conjunction to sun
4. März 2005 30. April 2005 2,14777 AE 9,8 mag 18. Juni 2005 10. Dezember 2005
10. Juni 2006 30. Juli 2006 1,47916 AE 8,3 mag 17. September 2006 16. April 2007
23. November 2007 10. Januar 2008 1,47650 AE 8,2 mag 26. Februar 2008 2. September 2008
8. Februar 2009 8. April 2009 2,14940 AE 9,8 mag 26. Mai 2009 17. November 2009
7. Mai 2010 27. Juni 2010 1,75731 AE 9,0 mag 18. August 2010 22. Februar 2011
15. Oktober 2011 28. November 2011 1,24553 AE 8,0 mag 3. Januar 2012 4. August 2012
16. Januar 2013 16. März 2013 2,04489 AE 9,6 mag 4. Mai 2013 26. Oktober 2013
8. April 2014 31. Mai 2014 1,98596 AE 9,5 mag 21. Juli 2014 15. Januar 2015
14. August 2015 2. Oktober 2015 1,21174 AE 7,9 mag 6. November 2015 27. Juni 2016
25. Dezember 2016 19. Februar 2017 1,84200 AE 9,2 mag 9. April 2017 4. Oktober 2017
12. März 2018 7. Mai 2018 2,12485 AE 9,8 mag 26. Juni 2018 18. Dezember 2018
23. Juni 2019 12. August 2019 1,39369 AE 8,2 mag 28. September 2019 5. Mai 2020
1. Dezember 2020 21. Januar 2021 1,56826 AE 8,4 mag 9. März 2021 11. September 2021

… | Previous asteroid | 15 Eunomia | Next asteroid | … Jump to: navigation, search 2005 (MMV) is a common year starting on Saturday of the Gregorian calendar. ... Jump to: navigation, search 2005 (MMV) is a common year starting on Saturday of the Gregorian calendar. ... Jump to: navigation, search 2005 (MMV) is a common year starting on Saturday of the Gregorian calendar. ... Jump to: navigation, search 2005 (MMV) is a common year starting on Saturday of the Gregorian calendar. ... Jump to: navigation, search 2006 is a common year starting on Sunday of the Gregorian calendar. ... Jump to: navigation, search 2006 is a common year starting on Sunday of the Gregorian calendar. ... Jump to: navigation, search 2006 is a common year starting on Sunday of the Gregorian calendar. ... Jump to: navigation, search 2007 is a common year starting on Monday of the Gregorian calendar. ... Jump to: navigation, search 2007 is a common year starting on Monday of the Gregorian calendar. ... Jump to: navigation, search Leap year starting on Tuesday // Predicted events FIFA will announce the host country to celebrate the 2014 FIFA World Cup The FIA will introduce new regulations for the Formula 1 in order to reduce the costs and improve racing. ... Jump to: navigation, search Leap year starting on Tuesday // Predicted events FIFA will announce the host country to celebrate the 2014 FIFA World Cup The FIA will introduce new regulations for the Formula 1 in order to reduce the costs and improve racing. ... Jump to: navigation, search Leap year starting on Tuesday // Predicted events FIFA will announce the host country to celebrate the 2014 FIFA World Cup The FIA will introduce new regulations for the Formula 1 in order to reduce the costs and improve racing. ... Jump to: navigation, search 2009 by topic 2009 (MMIX) is a common year starting on Thursday of the Gregorian calendar. ... Jump to: navigation, search 2009 by topic 2009 (MMIX) is a common year starting on Thursday of the Gregorian calendar. ... Jump to: navigation, search 2009 by topic 2009 (MMIX) is a common year starting on Thursday of the Gregorian calendar. ... Jump to: navigation, search 2009 by topic 2009 (MMIX) is a common year starting on Thursday of the Gregorian calendar. ... Jump to: navigation, search 2010 is a common year starting on Friday of the Gregorian calendar. ... Jump to: navigation, search 2010 is a common year starting on Friday of the Gregorian calendar. ... Jump to: navigation, search 2010 is a common year starting on Friday of the Gregorian calendar. ... Jump to: navigation, search 2011 (MMXI) is a common year starting on Saturday of the Gregorian calendar. ... Jump to: navigation, search 2011 (MMXI) is a common year starting on Saturday of the Gregorian calendar. ... Jump to: navigation, search 2011 (MMXI) is a common year starting on Saturday of the Gregorian calendar. ... Jump to: navigation, search 2012 (MMXII) is a leap year starting on Sunday of the Gregorian calendar. ... Jump to: navigation, search 2012 (MMXII) is a leap year starting on Sunday of the Gregorian calendar. ... 2013 is a common year starting on Tuesday of the Gregorian calendar. ... 2013 is a common year starting on Tuesday of the Gregorian calendar. ... 2013 is a common year starting on Tuesday of the Gregorian calendar. ... 2013 is a common year starting on Tuesday of the Gregorian calendar. ... Jump to: navigation, search 2014 is a common year starting on Wednesday of the Gregorian calendar. ... Jump to: navigation, search 2014 is a common year starting on Wednesday of the Gregorian calendar. ... Jump to: navigation, search 2014 is a common year starting on Wednesday of the Gregorian calendar. ... Jump to: navigation, search 2015 is a common year starting on Thursday of the Gregorian calendar. ... Jump to: navigation, search 2015 is a common year starting on Thursday of the Gregorian calendar. ... Jump to: navigation, search 2015 is a common year starting on Thursday of the Gregorian calendar. ... Jump to: navigation, search 2015 is a common year starting on Thursday of the Gregorian calendar. ... 2016 is a Leap year starting on Friday. ... 2016 is a Leap year starting on Friday. ... Jump to: navigation, search 2017 is a common year starting on Sunday (see link for calendar). ... Jump to: navigation, search 2017 is a common year starting on Sunday (see link for calendar). ... Jump to: navigation, search 2017 is a common year starting on Sunday (see link for calendar). ... 2018 is a Common year starting on Monday. ... 2018 is a Common year starting on Monday. ... 2018 is a Common year starting on Monday. ... 2018 is a Common year starting on Monday. ... 2019 is a Common year starting on Tuesday. ... 2019 is a Common year starting on Tuesday. ... 2019 is a Common year starting on Tuesday. ... 2020 is a leap year starting on Wednesday. ... 2020 is a leap year starting on Wednesday. ... 2021 is a common year starting on Friday. ... 2021 is a common year starting on Friday. ... 2021 is a common year starting on Friday. ... 14 Irene (eye REE nee) is a very large Main belt asteroid. ... Jump to: navigation, search 16 Psyche (sye-kee) is the 13th-largest Main belt asteroid, measuring 250 kilometers in diameter. ...



The minor planetsedit
Vulcanoids | Main belt | Groups and families | Near-Earth objects | Jupiter Trojans
Centaurs | Damocloids | Comets | Trans-Neptunians (Kuiper belt | Scattered disc | Oort cloud)
For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system
For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.

  Results from FactBites:
 
Asteroid (15) Eunomia in 2007 and 2008 (398 words)
Eunomia will be well north of the equator throughout this opposition period and so be low for observers at mid latitudes in the southern hemisphere.
Eunomia's orbital period is 4.30 years, its distance from the Sun varying between 2.15 and 3.14 AU, with an eccentricity of.186.
The orbit is inclined at 11.750° to the ecliptic.
  More results at FactBites »


 

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