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Encyclopedia > 25 Phocaea
25 Phocaea
Discovery A
Discoverer J. Chacornac
Discovery date April 6, 1853
Alternate
designations B		 1956 GC
Category Main belt
Orbital elements C
Epoch June 14, 2006 (JD 2453900.5)
Eccentricity (e) 0.255
Semi-major axis (a) 359.015 Gm (2.400 AU)
Perihelion (q) 267.314 Gm (1.787 AU)
Aphelion (Q) 450.716 Gm (3.013 AU)
Orbital period (P) 1357.936 d (3.72 a)
Mean orbital speed 18.91 km/s
Inclination (i) 21.584°
Longitude of the
ascending node (Ω)		 214.268°
Argument of
perihelion (ω)		 90.154°
Mean anomaly (M) 6.932°
Physical characteristics D
Dimensions 75.1 km
Mass 4.4×1017? kg
Density 2.0? g/cm³
Surface gravity 0.0210? m/s²
Escape velocity 0.0397? km/s
Rotation period 0.4144 d (9.945 h) [1]
Spectral class S
Absolute magnitude 7.83
Albedo (geometric) 0.231 [2]
Mean surface
temperature		 ~173 K

25 Phocaea (foe-see'-ə, fə-see'-ə (key)) is a Main belt asteroid. Jean Chacornac (June 21, 1823 – September 23, 1873) was a French astronomer. ... April 6 is the 96th day of the year in the Gregorian calendar (97th in leap years). ... 1853 was a common year starting on Saturday (see link for calendar). ... Provisional designation of in astronomy is the naming convention applied to astronomical objects immediately following their discovery. ... 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 planets (Mercury having a... 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. ... In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... June 14 is the 165th day of the year in the Gregorian calendar (166th in leap years), with 200 days remaining. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... The Julian day or Julian day number (JDN) is the (integer) number of days that have elapsed since Monday, January 1, 4713 BC in the proleptic Julian calendar [1]. That day is counted as Julian day zero. ... 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. ... The metre, or meter (US), is a measure of length. ... 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. ... Water, Rabbit, and Deer: three of the 20 day symbols in the Aztec calendar, from the Aztec Sun Stone. ... A Julian year is the length of an average year in the Julian calendar, 365. ... 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. ... Look up second in Wiktionary, the free dictionary. ... Inclination in general is the angle between a reference plane and another plane or axis of direction. ... A degree (in full, a degree of arc, arc degree, or arcdegree), 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. ... For the majority of numbered asteroids, almost nothing is known apart from a few physical parameters. ... Unsolved problems in physics: What causes anything to have mass? Mass is a property of a physical object that quantifies the amount of matter and energy it is equivalent to. ... The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... Density (symbol: ρ - Greek: rho) is a measure of mass per 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. ... Gravity is a force of attraction that acts between bodies that have mass. ... Space Shuttle Atlantis launches on mission STS-71 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... 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. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us (in the absence of interstellar extinction!). It allows the overall brightnesses of objects to be compared without regard to distance. ... Albedo is a ratio of scattered to incident electromagnetic radiation power. ... The geometric albedo of an astronomical body is the ratio of its total brightness at zero phase angle to that of an idealised fully reflecting, diffusively scattering (Lambertian) disk with the same cross-section. ... Fig. ... The Kelvin scale is a thermodynamic (absolute) temperature scale where absolute zero—the lowest possible temperature where nothing could be colder and no heat energy remains in a substance—is defined as zero kelvin (0 K). ... 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. ... 253 Mathilde, a C-type asteroid. ...


It was discovered by J. Chacornac on April 6, 1853. It was his first asteroid discovery. It is named after Phocaea, the ancient Greek name for Foça in Turkey. Jean Chacornac (June 21, 1823 – September 23, 1873) was a French astronomer. ... April 6 is the 96th day of the year in the Gregorian calendar (97th in leap years). ... 1853 was a common year starting on Saturday (see link for calendar). ... Satellite photo showing location of the ancient cities of Phocaea, Cyme and Smyrna Phocaea (modern-day Foça in Turkey) was an ancient Ionian Greek city on the western coast of Anatolia. ... Satellite photo showing location of the ancient cities of Phocaea, Cyme and Smyrna Phocaea (modern-day Foça in Turkey) was an ancient Ionian Greek city on the western coast of Anatolia. ...


Aspects

Stationary,
retrograde		 Opposition Distance to
Earth (AU)		 Maximum
brightness (mag)		 Stationary,
prograde		 Conjunction
to Sun
11 January 2005 8 March 2005 1.82532 11.9 21 April 2005 7 November 2005
14 August 2006 26 September 2006 0.99533 10.0 18 October 2006 31 May 2007
15 November 2007 12 January 2008 2.10276 12.5 3 March 2008 23 August 2008
16 February 2009 5 April 2009 1.44852 11.0 18 May 2009 15 January 2010
24 September 2010 9 November 2010 1.38260 10.8 25 December 2010 26 June 2011
4 December 2011 3 February 2012 2.11572 12.5 22 March 2012 18 September 2012
11 April 2013 16 May 2013 1.03737 10.0 30 June 2013 4 April 2014
17 October 2014 8 December 2014 1.77506 11.8 29 January 2015 20 July 2015
27 December 2015 25 February 2016 1.96560 12.2 10 April 2016 18 October 2016
29 June 2017 14 August 2017 0.92165 10.0 2 September 2017 15 May 2018
5 November 2018 31 December 2018 2.03214 12.3 22 February 2019 12 August 2019
28 January 2020 21 March 2020 1.65867 11.6 3 May 2020 3 December 2020
Minor planets
Previous minor planet 25 Phocaea Next minor planet
 v • d • e 
Small Solar System bodies
Vulcanoids | Near-Earth asteroids | Main belt | Jupiter Trojans | Centaurs | Damocloids | Comets | Trans-Neptunians (Kuiper belt · Scattered disc · Oort cloud)
For other objects and regions, see: asteroid groups and families, binary asteroids, asteroid moons and the Solar system
For a complete listing, see: List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.

  Results from FactBites:
 
Phocaea group (183 words)
A cluster of asteroids in the main asteroid belt that were perturbed into high inclination (21 to 25°) orbits by the gravitational effect of the major planets, notably Jupiter, during the earliest period of solar system.
The group is named after its first discovered member, (25) Phocaea, found in 1853 by the French astronomer Jean Chacornac (1823-1873), although its largest member is the C-class asteroid (105) Artemis, with a diameter of 126 km.
Most of the Phocaea group is a ragbag assemblage of objects without a common ancestry; however, certain members, including (323) Brucia, (852) Wladilena, and (1568) Aisleen, may form a true Hirayama family.
  More results at FactBites »


 

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