Discovery [1] | |
---|---|
Discovered by | K. Inkeri |
Discovery site | Turku Obs. |
Discovery date | 3 April 1937 |
Designations | |
(1425) Tuorla | |
Named after |
Tuorla Observatory
[2] (Inst. for Astronomy and Optics) |
1937 GB · 1950 KC 1950 LQ | |
main-belt · (
middle) Eunomia [3] [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 67.14 yr (24,522 days) |
Aphelion | 2.8766 AU |
Perihelion | 2.3483 AU |
2.6125 AU | |
Eccentricity | 0.1011 |
4.22 yr (1,542 days) | |
40.218 ° | |
0° 14m 0.24s / day | |
Inclination | 12.975° |
185.99° | |
342.25° | |
Physical characteristics | |
Dimensions | 11.795±0.874 km
[5] 14.34±1.08 km [6] 14.94±1.1 km [3] [7] |
6.76±0.01 h
[a] 6.97±0.01 h [8] 7.748±0.0027 h [9] 7.75±0.06 h [10] | |
0.2389 (derived)
[3] 0.2390±0.040 [7] 0.260±0.041 [6] 0.383±0.083 [5] | |
S [3] [11] | |
11.173±0.003 (R) [9] · 11.30 [3] [5] [6] [7] · 11.4 [1] · 11.91±0.41 [11] | |
1425 Tuorla, provisional designation 1937 GB, is a stony Eunomian asteroid from the central regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 3 April 1937, by Finnish astronomer Kustaa Inkeri at the Iso-Heikkilä Observatory in Turku, southwestern Finland. [12] The asteroid was named after the Tuorla Observatory of the University of Turku. [2] It was Kustaa Inkeri's only asteroid discovery. [13]
Tuorla is a member of the Eunomia family ( 502), [3] [4] a prominent family of stony asteroids and the largest one in the intermediate main belt with more than 5,000 members. [14]: 23 It orbits the Sun at a distance of 2.3–2.9 AU once every 4 years and 3 months (1,542 days). Its orbit has an eccentricity of 0.10 and an inclination of 13 ° with respect to the ecliptic. [1] The body's observation arc begins at Turku, the night before its official discovery observation. [12]
Tuorla has been characterized as a stony S-type asteroid by Pan-STARRS photometric survey, [11] in accordance with the overall spectral type for members of the Eunomia family. [14]: 23
In April 2013, the so-far best-rated a rotational lightcurve of Tuorla was obtained from photometric observations by astronomer Vladimir Benishek at Belgrade Observatory in Serbia. Lightcurve analysis gave a well-defined rotation period of 7.75 hours (h) with a brightness variation of 0.24 magnitude ( U=3). [10] Other lightcurves were obtained by Alfonso Carreno Garceran (6.76 h), [a] Laurent Bernasconi (7.75 h), [8] and the Palomar Transient Factory (7.748 h), [9]
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Tuorla measures between 11.795 and 14.94 kilometers in diameter and its surface has an albedo between 0.2390 and 0.383. [5] [6] [7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2389 and adopts a diameter of 14.94 kilometers from IRAS, based on an absolute magnitude of 11.3. [3]
This minor planet was named after the Tuorla Observatory, the Research Institute for Astronomy and Optics, of the University of Turku, located in Piikkiö near Turku, Finland. [2] The Tuorla Observatory was established by prolific minor-planet discoverer Yrjö Väisälä in 1952, as an alternative to the Iso-Heikkilä Observatory, where this asteroid was discovered. The official naming citation was published by the Minor Planet Center on 30 January 1964 ( M.P.C. 2277). [15]
Discovery [1] | |
---|---|
Discovered by | K. Inkeri |
Discovery site | Turku Obs. |
Discovery date | 3 April 1937 |
Designations | |
(1425) Tuorla | |
Named after |
Tuorla Observatory
[2] (Inst. for Astronomy and Optics) |
1937 GB · 1950 KC 1950 LQ | |
main-belt · (
middle) Eunomia [3] [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 67.14 yr (24,522 days) |
Aphelion | 2.8766 AU |
Perihelion | 2.3483 AU |
2.6125 AU | |
Eccentricity | 0.1011 |
4.22 yr (1,542 days) | |
40.218 ° | |
0° 14m 0.24s / day | |
Inclination | 12.975° |
185.99° | |
342.25° | |
Physical characteristics | |
Dimensions | 11.795±0.874 km
[5] 14.34±1.08 km [6] 14.94±1.1 km [3] [7] |
6.76±0.01 h
[a] 6.97±0.01 h [8] 7.748±0.0027 h [9] 7.75±0.06 h [10] | |
0.2389 (derived)
[3] 0.2390±0.040 [7] 0.260±0.041 [6] 0.383±0.083 [5] | |
S [3] [11] | |
11.173±0.003 (R) [9] · 11.30 [3] [5] [6] [7] · 11.4 [1] · 11.91±0.41 [11] | |
1425 Tuorla, provisional designation 1937 GB, is a stony Eunomian asteroid from the central regions of the asteroid belt, approximately 14 kilometers in diameter. It was discovered on 3 April 1937, by Finnish astronomer Kustaa Inkeri at the Iso-Heikkilä Observatory in Turku, southwestern Finland. [12] The asteroid was named after the Tuorla Observatory of the University of Turku. [2] It was Kustaa Inkeri's only asteroid discovery. [13]
Tuorla is a member of the Eunomia family ( 502), [3] [4] a prominent family of stony asteroids and the largest one in the intermediate main belt with more than 5,000 members. [14]: 23 It orbits the Sun at a distance of 2.3–2.9 AU once every 4 years and 3 months (1,542 days). Its orbit has an eccentricity of 0.10 and an inclination of 13 ° with respect to the ecliptic. [1] The body's observation arc begins at Turku, the night before its official discovery observation. [12]
Tuorla has been characterized as a stony S-type asteroid by Pan-STARRS photometric survey, [11] in accordance with the overall spectral type for members of the Eunomia family. [14]: 23
In April 2013, the so-far best-rated a rotational lightcurve of Tuorla was obtained from photometric observations by astronomer Vladimir Benishek at Belgrade Observatory in Serbia. Lightcurve analysis gave a well-defined rotation period of 7.75 hours (h) with a brightness variation of 0.24 magnitude ( U=3). [10] Other lightcurves were obtained by Alfonso Carreno Garceran (6.76 h), [a] Laurent Bernasconi (7.75 h), [8] and the Palomar Transient Factory (7.748 h), [9]
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Tuorla measures between 11.795 and 14.94 kilometers in diameter and its surface has an albedo between 0.2390 and 0.383. [5] [6] [7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2389 and adopts a diameter of 14.94 kilometers from IRAS, based on an absolute magnitude of 11.3. [3]
This minor planet was named after the Tuorla Observatory, the Research Institute for Astronomy and Optics, of the University of Turku, located in Piikkiö near Turku, Finland. [2] The Tuorla Observatory was established by prolific minor-planet discoverer Yrjö Väisälä in 1952, as an alternative to the Iso-Heikkilä Observatory, where this asteroid was discovered. The official naming citation was published by the Minor Planet Center on 30 January 1964 ( M.P.C. 2277). [15]