| Discovery[1] | |
|---|---|
| Discovered by | N. Chernykh |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 1 September 1978 |
| Designations | |
| (3204) Lindgren | |
Named after | Astrid Lindgren[1] (Swedish writer) |
| 1978 RH · 1980 CQ 1980 DM | |
| main-belt[1][2] · (outer) background[3] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 39.06yr (14,266 d) |
| Aphelion | 4.0411AU |
| Perihelion | 2.2764 AU |
| 3.1588 AU | |
| Eccentricity | 0.2793 |
| 5.61 yr (2,051 d) | |
| 327.09° | |
| 0° 10m 32.16s / day | |
| Inclination | 2.0630° |
| 108.70° | |
| 298.30° | |
| Physical characteristics | |
| 18.95±0.80 km[4] 19.596±0.248 km[5][6] 20.2±2.0 km[7] 20.21 km(calculated)[8] 21±2 km[9] | |
| 5.614±0.0047 h[10] 5.618±0.0047 h[10] | |
| 0.05±0.01[9] 0.057(assumed)[8] 0.06±0.01[7] 0.0606±0.0151[6] 0.063±0.007[5] 0.065±0.006[4] | |
| B(S3OS2)[11] C(assumed)[8] | |
| 12.10[7] 12.170±0.001(R)[10] 12.20[2][4][6][8][9] 12.35±0.23[12] 12.582±0.001(S)[10] | |
3204 Lindgren, provisional designation1978 RH, is a carbonaceous backgroundasteroid from the outer regions of theasteroid belt, approximately 20 kilometers (12 miles) in diameter. It was discovered on 1 September 1978, by Soviet astronomerNikolai Chernykh at theCrimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula.[1] TheB-type asteroid has arotation period of 5.6 hours.[8] It was named after Swedish writerAstrid Lindgren.[1]
Lindgren is a non-family asteroid from the main belt'sbackground population.[3] It orbits the Sun in theouter asteroid belt at a distance of 2.3–4.0 AU once every 5 years and 7 months (2,051 days;semi-major axis of 3.16 AU). Its orbit has aneccentricity of 0.28 and aninclination of 2° with respect to theecliptic.[2] The body'sobservation arc begins with its official discovery observation at Nauchnij in 1978.[1]
Lindgren has been characterized as a "bright" carbonaceousB-type asteroid in both the Tholen-like and SMASS-like taxonomy of theSmall Solar System Objects Spectroscopic Survey (S3OS2).[11] It is also an assumedC-type asteroid.[8]
In August 2012, two rotationallightcurves ofLindgren were obtained fromphotometric observations by astronomers at thePalomar Transient Factory in California. Lightcurve analysis gave arotation period of 5.614 and 5.618 hours with a brightness amplitude of 0.15magnitude in the S- and R-band, respectively (U=2/2).[10]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Lindgren measures between 19 and 21 kilometers in diameter and its surface has analbedo between 0.05 and 0.065.[4][5][6][7][9]
TheCollaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 20.21 kilometers based on anabsolute magnitude of 12.2.[8]
Thisminor planet was named after Swedish writerAstrid Lindgren (1907–2002), a recipient of theHans Christian Andersen Award and known for her children's books such asPippi Longstocking.[1] The official naming citation was published by theMinor Planet Center on 2 April 1988 (M.P.C. 12971).[13]
