1188 Gothlandia
Stony Florian asteroid
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1188 Gothlandia, provisional designation 1930 SB, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. Discovered by astronomer Josep Comas i Solà at the Fabra Observatory in 1930, the asteroid was later named after the ancient name of the Spanish autonomous community of Catalonia.
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Lightcurve-based 3D-model of Gothlandia | |
| Discovery[1] | |
|---|---|
| Discovered by | J. Comas Solà |
| Discovery site | Fabra Obs. |
| Discovery date | 30 September 1930 |
| Designations | |
| (1188) Gothlandia | |
| Pronunciation | /É¡ÉθËlændiÉ/ |
Named after | Catalonia[2] (Spanish autonomous community) |
| 1930 SB · 2016 FU5 A917 SK | |
| main-belt · (inner) Flora[3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 86.62 yr (31,639 days) |
| Aphelion | 2.5856 AU |
| Perihelion | 1.7948 AU |
| 2.1902 AU | |
| Eccentricity | 0.1805 |
| 3.24 yr (1,184 days) | |
| 294.72° | |
| 0° 18m 14.76s / day | |
| Inclination | 4.8169° |
| 5.4502° | |
| 7.1662° | |
| Physical characteristics | |
| Dimensions | 11.19±2.21 km[5] 12.11±0.76 km[6] 12.40±0.6 km[7] 12.42±0.6 km[8] 12.46 km (derived)[3] 12.670±0.136 km[9] 14.255±0.040 km[10] |
| 3.49138±0.00006 h[8] 3.4915±0.0001 h[11] 3.49153±0.00002 h[12] 3.4916 h[3] 3.4917±0.0005 h[13] 3.491820±0.00005 h[14] 3.491820 h[15] 3.49198±0.00014 h[12] 3.4921±0.0001 h[12] 3.493 h[16] | |
| 0.2065±0.0170[10] 0.2401±0.025[7] 0.2476±0.0242[8] 0.252±0.034[6] 0.2631 (derived)[3] 0.273±0.031[9] 0.41±0.18[5] | |
| SMASS = S[1][3][17] | |
| 11.34±0.27[18] · 11.50[5] · 11.59[3][10][16] · 11.6[1] · 11.662±0.014[8] · 11.70[6][7] | |
Discovery
Gothlandia was discovered on 30 September 1930, by Catalan astronomer Josep Comas i Solà at the Fabra Observatory in Barcelona, Spain.[19] It was independently discovered by Soviet Grigory Neujmin at Simeiz Observatory on 17 October 1930, and by K. Nakamura at Kyoto Observatory, Japan, on 18 October 1930.[2] The Minor Planet Center, however, only credits the first discoverer. The asteroid was first identified as A917 SK at Simeiz in September 1917.[19]
Orbit and classification
Gothlandia is a member of the Flora family (402),[4] a giant asteroid family and the largest family of stony asteroids in the main-belt.[20]:â23â It orbits the Sun in the inner main-belt at a distance of 1.8â2.6 AU once every 3 years and 3 months (1,184 days). Its orbit has an eccentricity of 0.18 and an inclination of 5° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Barcelona in 1930.[19]
Physical characteristics
In the SMASS classification, Gothlandia is a stony S-type asteroid,[1][17] which corresponds to the overall spectral type for Florian asteroids.[20]:â23â
Rotation period and poles
Several rotational lightcurves of Gothlandia have been obtained from photometric observations since the 1990s.[8][11][12][13][16] Lightcurve analysis gave a consolidated rotation period of 3.4916 hours with a brightness variation of 0.81 magnitude (U=3).[3] A high brightness amplitude typically indicates a non-spherical shape.
Modeled lightcurves using data from the Uppsala Asteroid Photometric Catalogue (UAPC) and other sources gave a concurring period 3.491820 hours.[14][15] In 2013, another modeled lightcurve obtained form photometric data collected by the Catalina Sky Survey also determined a spin axis of (334.0°, â84.0°) in ecliptic coordinates (λ, β).[21]
Diameter and albedo
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, Gothlandia measures between 11.19 and 14.255 kilometers in diameter and its surface has an albedo between 0.2065 and 0.41.[5][6][7][8][9][10]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.2631 and a diameter of 12.46 kilometers based on an absolute magnitude of 11.59.[3]
Naming
This minor planet was named after the Spanish autonomous community of Catalonia, by its ancient, per-medieval name Gothlandia ("Land of the Goths"). The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 110).[2]
