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 | 39.06 yr (14,266 d) |
Aphelion | 4.0411 AU |
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 | |
Mean diameter | 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 designation 1978 RH, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 20 kilometers (12 miles) in diameter. It was discovered on 1 September 1978, by Soviet astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula. [1] The B-type asteroid has a rotation period of 5.6 hours. [8] It was named after Swedish writer Astrid Lindgren. [1]
Lindgren is a non- family asteroid from the main belt's background population. [3] It orbits the Sun in the outer 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 an eccentricity of 0.28 and an inclination of 2 ° with respect to the ecliptic. [2] The body's observation arc begins with its official discovery observation at Nauchnij in 1978. [1]
Lindgren has been characterized as a "bright" carbonaceous B-type asteroid in both the Tholen-like and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2). [11] It is also an assumed C-type asteroid. [8]
In August 2012, two rotational lightcurves of Lindgren were obtained from photometric observations by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 5.614 and 5.618 hours with a brightness amplitude of 0.15 magnitude in the S- and R-band, respectively ( U=2/2). [10]
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Lindgren measures between 19 and 21 kilometers in diameter and its surface has an albedo between 0.05 and 0.065. [4] [5] [6] [7] [9]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 20.21 kilometers based on an absolute magnitude of 12.2. [8]
This minor planet was named after Swedish writer Astrid Lindgren (1907–2002), a recipient of the Hans Christian Andersen Award and known for her children's books such as Pippi Longstocking. [1] The official naming citation was published by the Minor Planet Center on 2 April 1988 ( M.P.C. 12971). [13]