Padua family

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The Padua family (FIN: 507), also known as the Lydia family, is a mid-sized family of asteroids of more than a thousand members.

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The family is at least 25 million years old. Its members were previously associated to 110 Lydia, and are predominantly X-type asteroids with an albedo of approximately 0.1. Together with the Agnia family, the Padua family is the only other family to have most of its members in a nonlinear secular resonance configuration with more than 75% of its members in a z1 librating state. [1] [2] [3] : 23 

The Paduan (Lydian) asteroids are located in the outer part of the central asteroid belt having a semi-major axis of approximately 2.75. The family's namesake is the asteroid 363 Padua, while 110 Lydia is now a suspected interloper, despite having the same spectral type. [1] [3] : 23 

Members

Some prominent members with known spectral type. [1] : 364  A list of all Paduan aststeroids is given at the "Small Bodies Data Ferret". [4]

Name Type DiameterAlbedo Catalog Refs
110 Lydia X860.1808 list JPL  · MPC  · LCDB
363 Padua X880.057 list JPL  · MPC  · LCDB
1517 Beograd X360.0448 list JPL  · MPC  · LCDB
1766 Slipher C200.057 list JPL  · MPC  · LCDB
2306 Bauschinger X210.0526 list JPL  · MPC  · LCDB
2560 Siegma Xc200.057 list JPL  · MPC  · LCDB
3020 Naudts Sl160.057 list JPL  · MPC  · LCDB
3670 Northcott X190.045 list JPL  · MPC  ·—
5087 Emelʹyanov X130.057 list JPL  · MPC  · LCDB
5103 Diviš X120.074 list JPL  · MPC  ·—
8450 Egorov C110.058 list JPL  · MPC  ·—
12281 Chaumont X160.032 list JPL  · MPC  ·—
Diameter and albedo figures taken from the LCDB, or, if not available, from JPL's SBDB. Also see category.

Lydia former namesake and potential interloper

In previous works (Zappala et al. 1995), this family was named Lydia after 110 Lydia, which is an X-type asteroid in the SMASS classification (Tholen: M-type). While Lydia is still a member of the now-called Padua family (Nesvorny 2005, AstDyS), it has been suspected that it might be an interloper in its "own" family despite its matching spectral type (Carruba 2009; Mothe-Diniz et al. 2005). [1] : 369 

Also, the asteroid 308 Polyxo was formerly considered the family's largest member. [5] This T-type asteroid is no-longer considered a family member and is categorized as a background asteroid on AstDyS. [4] [6]

Related Research Articles

The Eunomia or Eunomian family is a large asteroid family of S-type asteroids named after the asteroid 15 Eunomia. It is the most prominent family in the intermediate asteroid belt and the 6th-largest family with nearly six thousand known members, or approximately 1.4% of all asteroids in the asteroid belt.

<span class="mw-page-title-main">110 Lydia</span> Main-belt asteroid

Lydia is a large belt asteroid with an M-type spectrum, and thus may be metallic in composition, consisting primarily of nickel-iron. It was discovered by French astronomer Alphonse Borrelly on 19 April 1870 and was named for Lydia, the Asia Minor country populated by Phrygians. The Lydia family of asteroids is named after it.

<span class="mw-page-title-main">Asteroid family</span> Population of asteroids that share similar proper orbital elements and orbital inclination

An asteroid family is a population of asteroids that share similar proper orbital elements, such as semimajor axis, eccentricity, and orbital inclination. The members of the families are thought to be fragments of past asteroid collisions. An asteroid family is a more specific term than asteroid group whose members, while sharing some broad orbital characteristics, may be otherwise unrelated to each other.

Phaeo is an asteroid from the central regions of the asteroid belt, approximately 70 kilometers in diameter. It was discovered on 27 November 1891, by French astronomer Alphonse Borrelly at the Marseille Observatory in southern France. The presumably metallic X-type asteroid is the principal body of the Phaeo family and has a rotation period of 17.6 hours. It was named for the Greek mythological figure Phaeo, one of the Hyades or nymphs. Several other asteroids were named for other of the Hyades – 106 Dione, 158 Koronis, 217 Eudora, and 308 Polyxo.

Praxedis, provisional designation 1904 PB, is a Postremian asteroid from the central regions of the asteroid belt, approximately 52 kilometers in diameter.

1766 Slipher, provisional designation 1962 RF, is a Paduan asteroid from the central regions of the asteroid belt, approximately 18 kilometers in diameter. It was discovered on 7 September 1962, by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. The asteroid was named after American astronomers Vesto Slipher and his brother Earl C. Slipher.

<span class="mw-page-title-main">1767 Lampland</span>

1767 Lampland, provisional designation 1962 RJ, is an Eoan asteroid from the outer regions of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 7 September 1962, by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. The asteroid was named after American astronomer Carl Lampland.

1517 Beograd, provisional designation 1938 FD, is a dark Paduan asteroid from the central region of the asteroid belt, approximately 36 kilometers in diameter. It was discovered on 20 March 1938, by Serbian astronomer Milorad Protić at Belgrade Astronomical Observatory in Serbia. It is named after the city Belgrade.

The Adeona or Adeonian family is a large asteroid family that formed from the parent body 145 Adeona. Its spectral type is that of a carbonaceous C-type, with currently 2,236 asteroids identified as family members. Based upon simulation studies, the Adeonian family is believed to be no more than 600 million years old, compared to a typical asteroid family age of 1–2 billion years.

133528 Ceragioli, provisional designation 2003 TC2, is an asteroid of the Koronis family from the outer regions of the asteroid belt, approximately 1.75 kilometers (1.1 miles) in diameter. It was discovered on 4 October 2003, by American astronomer David Healy at the Junk Bond Observatory in Arizona, United States. The likely stony and possibly elongated asteroid has a rotation period of 3.1 hours. It was named for American optician Roger Ceragioli.

2325 Chernykh, provisional designation 1979 SP, is a dark Themistian asteroid from the outer regions of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 25 September 1979, by Czech astronomer Antonín Mrkos at the Klet Observatory in the Czech Republic. The asteroid was named after Russian astronomer couple Lyudmila Chernykh and Nikolai Chernykh.

<span class="mw-page-title-main">1588 Descamisada</span>

1588 Descamisada, provisional designation 1951 MH, is an Eos asteroid from the outer region of the asteroid belt, approximately 18 kilometers in diameter. It was discovered on 27 June 1951, by astronomer Miguel Itzigsohn at the La Plata Astronomical Observatory in La Plata, Argentina, and named in honor of Eva Perón.

1212 Francette, provisional designation 1931 XC, is a dark Hildian asteroid from the outermost regions of the asteroid belt, approximately 82 kilometers in diameter. It was discovered on 3 December 1931, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa, who named it after his wife Francette Boyer.

21509 Lucascavin, provisional designation 1998 KL35, is a small asteroid from the inner regions of the asteroid belt, approximately 2.5 kilometers (1.6 miles) in diameter. It is the namesake of the tiny Lucascavin family located within the Flora clan. It was discovered on 22 May 1998, by astronomers with the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico. The presumed S-type asteroid has a rotation period of 5.8 hours. It was named for the 2005-ISEF awardee Lucas James Cavin.

1392 Pierre, provisional designation 1936 FO, is a dark, dynamical Eunomian asteroid from the central regions of the asteroid belt, approximately 26 kilometers (16 mi) in diameter. It was discovered on 16 March 1936, by astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa. The asteroid was named after the discoverer's nephew, Pierre.

2732 Witt, provisional designation 1926 FG, is a bright asteroid and namesake of the Witt family located in the central regions of the asteroid belt, approximately 11 kilometers in diameter. It was discovered on 19 March 1926, by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. The unusual A-type asteroid was named after astronomer Carl Gustav Witt.

95179 Berkó, provisional designation 2002 BO, is a Massalian asteroid from the inner regions of the asteroid belt, approximately 1.4 kilometers in diameter.

164589 La Sagra, provisional designation 2007 PC11, is an asteroid of the Euterpe family from the inner regions of the asteroid belt, approximately 1.2 kilometers (0.75 miles) in diameter. It was discovered on 11 August 2007, by astronomers of the Astronomical Observatory of Mallorca at its robotic La Sagra Observatory in Grenada, Spain. It was named after Mount La Sagra and the discovering La Sagra Observatory.

24827 Maryphil, provisional designation 1995 RA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 2 September 1995, by American astronomer Timothy Spahr at the Catalina Station near Tucson, Arizona, who named it for his parents, Mary & Phil Spahr.

(39546) 1992 DT5 is a dark Hoffmeister asteroid and exceptionally slow rotator from the central region of the asteroid belt, approximately 5.3 kilometers (3.3 miles) in diameter. The likely elongated C-type asteroid was discovered on 29 February 1992, by the Uppsala–ESO Survey of Asteroids and Comets at ESO's La Silla astronomical observatory site in northern Chile.

References

  1. 1 2 3 4 Carruba, V. (May 2009). "The (not so) peculiar case of the Padua family". Monthly Notices of the Royal Astronomical Society. 395 (1): 358–377. Bibcode:2009MNRAS.395..358C. doi: 10.1111/j.1365-2966.2009.14523.x .
  2. ↑ Carruba, V.; Domingos, R. C.; Nesvorný, D.; Roig, F.; Huaman, M. E.; Souami, D. (August 2013). "A multidomain approach to asteroid families' identification". Monthly Notices of the Royal Astronomical Society. 433 (3): 2075–2096. arXiv: 1305.4847 . Bibcode:2013MNRAS.433.2075C. doi:10.1093/mnras/stt884. S2CID   118511004.
  3. 1 2 Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). Identification and Dynamical Properties of Asteroid Families. Asteroids IV. pp. 297–321. arXiv: 1502.01628 . Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN   9780816532131. S2CID   119280014.
  4. 1 2 "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Archived from the original on 16 August 2017. Retrieved 22 July 2017.
  5. ↑ Ridpath, Ian (2003). Oxford Dictionary of Astronomy. Oxford University Press. ISBN   0199609055 . Retrieved 25 January 2016.
  6. ↑ "AstDyS-2 data for (308) Polyxo". AstDyS – Asteroids Dynamic Site. Retrieved 30 August 2017.
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