Discovery [1] | |
---|---|
Discovered by | M. F. Wolf |
Discovery site | Heidelberg Obs. |
Discovery date | 31 May 1918 |
Designations | |
(893) Leopoldina | |
Named after |
Academy of Sciences Leopoldina (Germany's nat'l academy) [2] |
A918 KD · 1935 OL 1918 DS | |
main-belt
[1]
[3] · (
outer) background [4] [5] | |
Orbital characteristics [3] | |
Epoch 31 May 2020 ( JD 2459000.5) | |
Uncertainty parameter 0 | |
Observation arc | 101.67 yr (37,134 d) |
Aphelion | 3.5069 AU |
Perihelion | 2.6027 AU |
3.0548 AU | |
Eccentricity | 0.1480 |
5.34 yr (1,950 d) | |
291.98 ° | |
0° 11m 4.56s / day | |
Inclination | 17.025° |
144.94° | |
222.40° | |
Physical characteristics | |
Dimensions | 82.8 km × 59.8 km [5] |
14.115±0.003 h [9] [a] | |
9.6 [1] [3] | |
893 Leopoldina ( prov. designation: A918 KD or 1918 DS) is a large and elongated background asteroid from the outer regions of the asteroid belt. It was discovered by German astronomer Max Wolf at the Heidelberg Observatory on 31 May 1918. [1] The dark carbonaceous C-type asteroid has a rotation period of 14.1 hours and measures approximately 76 kilometers (47 miles) in diameter. It was named for Germany's national academy, the Academy of Sciences Leopoldina in Halle. [2]
Leopoldina is a non- family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. [4] [5] It orbits the Sun in the outer asteroid belt at a distance of 2.6–3.5 AU once every 5 years and 4 months (1,950 days; semi-major axis of 3.05 AU). Its orbit has an eccentricity of 0.15 and an inclination of 17 ° with respect to the ecliptic. [3] The body's observation arc begins with its official discovery observation at Heidelberg Observatory on 31 May 1918. [1]
In the Tholen classification, Leopoldina's asteroid spectral type is closest to that of an X-type, and somewhat similar to that of a dark F-type asteroid (XF), while in both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), it is a common carbonaceous C-type asteroid. [3] [5] [10]
This minor planet was named for Germany's national academy, the Academy of Sciences Leopoldina (German: Carolinisch-Leopoldinische Akademie der Naturforscher) in Halle, Saxony-Anhalt. The naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 86). [2]
In April 2008, a rotational lightcurve of Leopoldina was obtained from photometric observations by Brian Warner at the Palmer Divide Observatory ( 716) in Colorado. Analysis gave a classically shaped bimodal lightcurve with a well-defined rotation period of 14.115±0.003 hours and a brightness variation of 0.18±0.02 magnitude ( U=3). [9] [a] The result supersedes Warner's previous observation from August 2005, which determined a period of 10.51±0.01 hours and an amplitude of 0.35±0.02 magnitude ( U=2). [11]
According to the survey carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Leopoldina measures (75.55±0.97), (76.14±4.5) and (85.992±0.577) kilometers in diameter and its surface has an albedo of (0.051±0.001), (0.0497±0.006) and (0.039±0.007), respectively. [6] [7] [8] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0497 and a diameter of 76.14 kilometers based on an absolute magnitude of 9.47. [12]
Alternative mean-diameter measurements published by the WISE team include (57.900±15.097 km), (68.91±23.37 km), (76±8 km), (76.1±15.2 km) and (76.623±2.309 km) with albedos in the range of 0.049 to 0.06. [5] [12]
Three asteroid occultation were obtained on 29 January 1996, 30 August 2010 and 16 May 2015. They gave a best-fit ellipse dimension of 79.0 × 72.0 kilometers, 82.8 × 59.8 kilometers (best), and 75.0 × 75.0 kilometers, respectively. These timed observations are taken when the asteroid passes in front of a distant star. [5]
Discovery [1] | |
---|---|
Discovered by | M. F. Wolf |
Discovery site | Heidelberg Obs. |
Discovery date | 31 May 1918 |
Designations | |
(893) Leopoldina | |
Named after |
Academy of Sciences Leopoldina (Germany's nat'l academy) [2] |
A918 KD · 1935 OL 1918 DS | |
main-belt
[1]
[3] · (
outer) background [4] [5] | |
Orbital characteristics [3] | |
Epoch 31 May 2020 ( JD 2459000.5) | |
Uncertainty parameter 0 | |
Observation arc | 101.67 yr (37,134 d) |
Aphelion | 3.5069 AU |
Perihelion | 2.6027 AU |
3.0548 AU | |
Eccentricity | 0.1480 |
5.34 yr (1,950 d) | |
291.98 ° | |
0° 11m 4.56s / day | |
Inclination | 17.025° |
144.94° | |
222.40° | |
Physical characteristics | |
Dimensions | 82.8 km × 59.8 km [5] |
14.115±0.003 h [9] [a] | |
9.6 [1] [3] | |
893 Leopoldina ( prov. designation: A918 KD or 1918 DS) is a large and elongated background asteroid from the outer regions of the asteroid belt. It was discovered by German astronomer Max Wolf at the Heidelberg Observatory on 31 May 1918. [1] The dark carbonaceous C-type asteroid has a rotation period of 14.1 hours and measures approximately 76 kilometers (47 miles) in diameter. It was named for Germany's national academy, the Academy of Sciences Leopoldina in Halle. [2]
Leopoldina is a non- family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. [4] [5] It orbits the Sun in the outer asteroid belt at a distance of 2.6–3.5 AU once every 5 years and 4 months (1,950 days; semi-major axis of 3.05 AU). Its orbit has an eccentricity of 0.15 and an inclination of 17 ° with respect to the ecliptic. [3] The body's observation arc begins with its official discovery observation at Heidelberg Observatory on 31 May 1918. [1]
In the Tholen classification, Leopoldina's asteroid spectral type is closest to that of an X-type, and somewhat similar to that of a dark F-type asteroid (XF), while in both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), it is a common carbonaceous C-type asteroid. [3] [5] [10]
This minor planet was named for Germany's national academy, the Academy of Sciences Leopoldina (German: Carolinisch-Leopoldinische Akademie der Naturforscher) in Halle, Saxony-Anhalt. The naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 86). [2]
In April 2008, a rotational lightcurve of Leopoldina was obtained from photometric observations by Brian Warner at the Palmer Divide Observatory ( 716) in Colorado. Analysis gave a classically shaped bimodal lightcurve with a well-defined rotation period of 14.115±0.003 hours and a brightness variation of 0.18±0.02 magnitude ( U=3). [9] [a] The result supersedes Warner's previous observation from August 2005, which determined a period of 10.51±0.01 hours and an amplitude of 0.35±0.02 magnitude ( U=2). [11]
According to the survey carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), Leopoldina measures (75.55±0.97), (76.14±4.5) and (85.992±0.577) kilometers in diameter and its surface has an albedo of (0.051±0.001), (0.0497±0.006) and (0.039±0.007), respectively. [6] [7] [8] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0497 and a diameter of 76.14 kilometers based on an absolute magnitude of 9.47. [12]
Alternative mean-diameter measurements published by the WISE team include (57.900±15.097 km), (68.91±23.37 km), (76±8 km), (76.1±15.2 km) and (76.623±2.309 km) with albedos in the range of 0.049 to 0.06. [5] [12]
Three asteroid occultation were obtained on 29 January 1996, 30 August 2010 and 16 May 2015. They gave a best-fit ellipse dimension of 79.0 × 72.0 kilometers, 82.8 × 59.8 kilometers (best), and 75.0 × 75.0 kilometers, respectively. These timed observations are taken when the asteroid passes in front of a distant star. [5]