_Emilkowalski.png) Emilkowalski modeled from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | R. A. Kowalski |
| Discovery site | Quail Hollow Obs. (761) |
| Discovery date | 7 November 1998 |
| Designations | |
| (14627) Emilkowalski | |
Named after | Emil Kowalski (discoverer's family)[2] |
| 1998 VA | |
| main-belt · (middle) Emilkowalski[3]: 24 | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.93 yr (22,985 days) |
| Aphelion | 2.9885AU |
| Perihelion | 2.2112 AU |
| 2.5998 AU | |
| Eccentricity | 0.1495 |
| 4.19yr (1,531 days) | |
| 151.54° | |
| 0° 14m 6.36s / day | |
| Inclination | 17.751° |
| 41.443° | |
| 44.474° | |
| Physical characteristics | |
| 6.98±2.55 km[4] 7.105±0.106 km[5][6] 7.84±2.33 km[7] 10.61 km(calculated)[8] | |
| 11.131±0.005 h[a] 11.131 h[9] | |
| 0.057(assumed)[8] 0.09±0.10[7] 0.120±0.108[4] 0.201±0.017[5][6] | |
| C[8] · DL[10] · S[3] | |
| 13.1[5] · 13.38(R)[9] · 13.6[1][8] · 13.7[4] · 13.85[7] · 14.19±0.75[10] | |
14627 Emilkowalski (prov. designation:1998 VA) is a stonyasteroid from the central region of theasteroid belt, approximately 7 kilometers (4.3 miles) in diameter. It was discovered on 7 November 1998, by American astronomerRichard Kowalski at the Quail Hollow Observatory (761) in Zephyrhills, Florida, United States.[11] The asteroid is the namesake of the recently formedEmilkowalski family of asteroids.[3] It was named after Emil Kowalski, mentor of the discoverer.[2]
Emilkowalski orbits the Sun in thecentral main-belt at a distance of 2.2–3.0 AU once every 4 years and 2 months (1,531 days). Its orbit has aneccentricity of 0.15 and aninclination of 18° with respect to theecliptic.[1]
The first unused observation atPalomar Observatory (DSS) dates back to 1953. The first usedprecovery was taken atSiding Spring Observatory in 1975, extending the asteroid'sobservation arc by 23 years prior to its discovery.[11]
Emilkowalski is the biggest member and namesake of acollisional group of asteroids, that resulted from the destruction of a larger parent body. The disruption happened approximately 220,000 years ago and it is one of the most recent asteroid breakups discovered in the main belt.[9][12] The recently formed stony Emilkowalski family (family identification number: 523) consist of only 4 identified members.[3]: 8, 24 The other members are(126761) 2002 DW10,(224559) 2005 WU178 and(256124) 2006 UK337.[13]
Thisminor planet is named after American Emil Kowalski (1918–1994) from Syosset, New York, who inspired the discoverer of space science when he was still a child.[2] The approved naming citation was published by theMinor Planet Center on 4 August 2001 (M.P.C. 43192).[14]
Emilkowalski has been characterized as a rare DL-type byPan-STARRS photometric survey.[10] It has also been assigned a taxonomic type of a darkercarbonaceous and a commonstony asteroid, respectively.[8][3]: 24
Between January and March 2012,photometric observations for this asteroid were made by a team led byPetr Pravec atOndřejov Observatory, Czech Republic. The three obtained rotationallightcurves gave an identicalperiod of11.131 hours with a brightness variation of 0.55, 0.64 and 0.65 inmagnitude, respectively (U=3/2+/3-).[a] Previously, in 2008, a lightcurve was obtained from observations at theSimeiz Observatory and the Chuguev Observing Station (121) in Ukraine, as well as at Maidanak Observatory in Uzbekistan. It also gave a period of 11.131 hours with an amplitude of 0.85 in magnitude, which implies an elongated shape (U=n.a.).[9]
According to the surveys carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Emilkowalski measures between 6.98 and 7.84 kilometers in diameter and its surface has analbedo of 0.09 and 0.201.[4][5][6][7]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo forcarbonaceous asteroids of 0.057 and hence calculates a larger diameter of 10.6 kilometers.[8]
