1026 Ingrid

Main-belt asteroid May 2024 yes 1026 Ingrid #D6D6D6 K. Reinmuth Heidelberg Obs. 13 August 1923 (1026) Ingrid 1923 NY1957 UC1963 GD1981 WL 81986 CG 21986 ES 2 Ingrid, niece of astronomer Albrecht Kahrstedt main-belt(inner)Flora 4 September 2017 (JD 2458000.5) 0 93.89 yr (34,294 days) 2.6636 AU 1.8458 AU 2.2547 AU 0.1814 3.39 yr (1,237 days) 292.55° 0.2911 ms / day 5.3994° 104.59° 212.34° 5.73 1.01 km6.96 0.68 km7.353 0.082 km7.670 0.069 km8.19 km (calculated) 5 h 0.1441 0.02500.156 0.0240.175 0.0350.24 (assumed)0.43 0.22 S  12.612.7012.813.30 1026 Ingrid, provisional designation 1923 NY, is a stony Florian asteroid and long-lost minor planet (1923–1986) from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by Karl Reinmuth at Heidelberg in 1923, and later named after Ingrid, niece and godchild of astronomer Albrecht Kahrstedt. Discovery and recovery Ingrid was discovered on 13 August 1923, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was observed for only a few days during August 1923, before it became a lost minor planet for nearly 63 years until its recovery by Japanese astronomer Syuichi Nakano in 1986. Nakano was able to show that Ingrid had been observed and provisionally designated several times during its lost period: as 1957 UC at the discovering Heidelberg Observatory in October 1957, possibly as 1963 GD at Goethe Link Observatory in April 1963, as 1981 WL 8 at the Crimean Astrophysical Observatory in November 1981, and as 1986 ES 2 at Palomar Observatory in March 1986. With the recovery of Ingrid in 1986, and the almost simultaneously recovered asteroid 1179 Mally, the list of long-lost numbered asteroids was reduced to four. The last remaining lost asteroid, 69230 Hermes, was recovered in 2003. Orbit and classification Ingrid is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 1.8–2.7 AU once every 3 years and 5 months (1,237 days). Its orbit has an eccentricity of 0.18 and an inclination of 5° with respect to the ecliptic. The body's observation arc begins at Heidelberg, one night after its official discovery observation in 1923. Physical characteristics Ingrid is an assumed S-type asteroid, in-line with the Flora family's spectral type.23 Rotation period A rotational lightcurve of Ingrid was obtained from photometric observations by a group of Hungarian astronomers. The 2005-published lightcurve analysis gave a rotation period of 5 hours with a brightness variation of 0.5 magnitude (U=2). Diameter and albedo According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Ingrid measures between 5.73 and 7.67 kilometers in diameter and its surface has an albedo between 0.1441 and 0.43. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of the Flora family – and calculates a diameter of 8.19 kilometers based an absolute magnitude of 12.6. Naming This minor planet was named after Ingrid, niece and godchild of Albrecht Kahrstedt (1897–1971), a German astronomer at ARI and director of the institute's Potsdam division, who requested the naming of this asteroid and 984 Gretia (mother of Ingrid) in a personal letter to the discoverer in February 1926. Kahrstedt himself was honored with the naming of 1587 1587 Kahrstedt. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H98). Lutz Schmadel quoted an excerpt of Kahrstedt's letter in his Dictionary of Minor Planet Names (LDS). References 30em 2017-07-05 last obs. JPL Small-Body Database Browser: 1026 Ingrid (1923 NY) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001026 Jet Propulsion Laboratory 25 August 2017 Schmadel Lutz D. Dictionary of Minor Planet Names Springer Berlin Heidelberg 88 2007 978-3-540-00238-3 10.1007/978-3-540-29925-7_1027 (1026) Ingrid 1026 Ingrid (1923 NY) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=1026 25 August 2017 International Astronomical Union Circular 4281 Central Bureau for Astronomical Telegrams Brian G. Marsden Brian G. Marsden 8 December 1986 http://www.cbat.eps.harvard.edu/iauc/04200/04281.html 25 August 2017 6 Joseph R. Masiero T. Grav A. K. Mainzer C. R. Nugent J. M. Bauer R. Stevenson S. Sonnett August 2014 Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M The Astrophysical Journal 791 2 11 2014ApJ...791..121M 10.1088/0004-637X/791/2/121 1406.6645 25 August 2017 Asteroid 1026 Ingrid – Nesvorny HCM Asteroid Families V3.0 Small Bodies Data Ferret https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1026+Ingrid#Asteroid%201026%20IngridEAR-A-VARGBDET-5-NESVORNYFAM-V3.0 31 October 2019 October 2026 InternetArchiveBot D. Nesvorný M. Broz V. Carruba December 2014 Identification and Dynamical Properties of Asteroid Families Asteroids IV 297–321 2015aste.book..297N 10.2458/azu_uapress_9780816532131-ch016 1502.01628 9780816532131 1026 25 August 2017 6 Fumihiko Usui Daisuke Kuroda Thomas G. Müller Sunao Hasegawa Masateru Ishiguro Takafumi Ootsubo Daisuke Ishihara Hirokazu Kataza Satoshi Takita Shinki Oyabu Munetaka Ueno Hideo Matsuhara Takashi Onaka October 2011 Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey Publications of the Astronomical Society of Japan 63 5 1117–1138 2011PASJ...63.1117U 10.1093/pasj/63.5.1117 (online, AcuA catalog p. 153) 6 A. Mainzer T. Grav J. Masiero E. Hand J. Bauer D. Tholen R. S. McMillan T. Spahr R. M. Cutri E. Wright J. Watkins W. Mo C. Maleszewski November 2011 NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results The Astrophysical Journal 741 2 25 2011ApJ...741...90M 10.1088/0004-637X/741/2/90 1109.6407 6 C. R. Nugent A. Mainzer J. Masiero J. Bauer R. M. Cutri T. Grav E. Kramer S. Sonnett R. Stevenson E. L. Wright December 2015 NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N The Astrophysical Journal 814 2 13 2015ApJ...814..117N 10.1088/0004-637X/814/2/117 1509.02522 25 August 2017 6 P. Székely L. L. Kiss Gy. M. Szabó K. Sárneczky B. Csák M. Váradi Sz. Mészáros August 2005 CCD photometry of 23 minor planets http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2005P&SS...53..925S Planetary and Space Science 53 9 925–936 2005P&SS...53..925S 10.1016/j.pss.2005.04.006 astro-ph/0504462 25 August 2017 External links Asteroid Lightcurve Database (LCDB), query form (info https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html 16 December 2017 ) Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR https://web.archive.org/web/20160729213840/http://obswww.unige.ch/~behrend/page_cou.html 29 July 2016 – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center 1026 1025 Riema 1026 1027 Aesculapia 001026 Category:Discoveries by Karl Wilhelm Reinmuth Category:Named minor planets 19230813 01026