1105 Fragaria
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| name = 1105 Fragaria
| background = #D6D6D6
| image = 001105-asteroid shape model (1105) Fragaria.png
| image_scale =
| caption = Shape model of Fragaria from its lightcurve
| discoverer = K. Reinmuth
| discovery_site = Heidelberg Obs.
| discovered = 1 January 1929
| mpc_name = (1105) Fragaria
| alt_names = 1929 AB{{·}}1947 KB
1977 EU{{·}}A916 MA
A917 UH
| pronounced = {{IPAc-en|f|r|ə|ˈ|ɡ|ɛər|i|ə}}Sunset Western Garden Book, 1995:606–607
| named_after = Fragaria
{{small|(flowering plant)}}
| mp_category = main-belt{{·}}{{small|(outer)}}
Eos
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 89.13 yr (32,553 days)
| aphelion = 3.3288 AU
| perihelion = 2.6915 AU
| semimajor = 3.0101 AU
| eccentricity = 0.1059
| period = 5.22 yr (1,908 days)
| mean_anomaly = 110.60°
| mean_motion = {{Deg2DMS|0.1887|sup=ms}} / day
| inclination = 10.968°
| asc_node = 116.90°
| arg_peri = 225.01°
| mean_diameter = {{val|27.92|3.41}} km
{{val|31.518|0.346}} km
36.95 km {{small|(derived)}}
{{val|37.03|3.8}} km
{{val|38.206|0.703}} km
{{val|38.41|0.46}} km
| rotation = {{val|5.4312|0.0008|ul=h}}
| albedo = {{val|0.1017|0.0167}}
0.1086 {{small|(derived)}}
{{val|0.113|0.003}}
{{val|0.1186|0.029}}
{{val|0.128|0.008}}
{{val|0.166|0.058}}
| spectral_type = Tholen {{=}} ST{{·}}U/L
B–V {{=}} {{val|0.776|029}}
U–B {{=}} {{val|0.419|0.049}}
| abs_magnitude = 10.09
10.19
10.34
}}
1105 Fragaria {{IPAc-en|f|r|ə|ˈ|ɡ|ɛər|i|ə}} is an Eos asteroid from the outer regions of the asteroid belt. It was discovered on 1 January 1929, by German astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany, and assigned the provisional designation {{mp|1929 AB}}. The S-type asteroid (ST/L) has a rotation period of 5.4 hours and measures approximately {{convert|37|km|mi|abbr=off|sp=us}} in diameter. It was named after the flowering plant Fragaria (strawberry).
Orbit and classification
Fragaria belongs to the Eos family ({{small|606}}), the largest asteroid family of the outer asteroid belt consisting of nearly 10,000 members. It orbits the Sun in the outer asteroid belt at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,908 days; semi-major axis of 3.01 AU). Its orbit has an eccentricity of 0.11 and an inclination of 11° with respect to the ecliptic.
The asteroid was first observed as {{mp|1916 MA}} at Simeiz Observatory in June 1916. The body's observation arc begins at Heidelberg in December 1928, three weeks prior to its official discovery observation.
Naming
This minor planet was named after Fragaria, the genus of flowering plants in the rose family, commonly known as strawberries. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ({{small|H 104}}).
= Reinmuth's flower =
Karl Reinmuth submitted a list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between {{MoMP|1009|(1009)}} and {{MoMP|1200|(1200)}}. This list also contained a sequence of 28 asteroids, starting with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants).
Physical characteristics
In the Tholen classification, Fragaria has an ambiguous spectral type, closest to an S-type and somewhat similar to the darker and uncommon T-type asteroids (ST), while polarimetric observations characterized it as an U/L-type asteroid. The overall spectral type for members of the Eos family is that of a K-type.{{rp|23}}
= Rotation period =
In December 2017. a rotational lightcurve of Fragaria was obtained from photometric observations by American photometrist Tom Polakis at the Command Module Observatory {{Obscode|V02}} in Arizona. Lightcurve analysis gave a rotation period of {{val|5.4312|0.0008}} hours with a brightness variation of {{val|0.33|0.03}} magnitude ({{small|U=3–}}). Since the 1990s, the best period determinations was mady by French and Italian astronomers at ESO's La Silla Observatory using the ESO 1-metre telescope which gave 10.88 hours (or twice the period solution) and an amplitude of 0.12 magnitude ({{small|U=1}}). As of 2018, no secure period has been obtained.
= 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, Fragaria measures between 27.92 and 38.41 kilometers in diameter and its surface has an albedo between 0.1017 and 0.166. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1086 and a diameter of 36.95 kilometers based on an absolute magnitude of 10.19.
References
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|title = 1105 Fragaria (1929 AB)
|work = Minor Planet Center
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|publisher = Asteroid Lightcurve Database (LCDB)
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}}
External links
- [http://www.minorplanet.info/PHP/OneAsteroidInfo.php Lightcurve Database Query] (LCDB), at www.minorplanet.info
- [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
- [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Geneva Observatory, Raoul Behrend
- [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center
- {{AstDys|1105}}
- {{JPL small body}}
{{Minor planets navigator |1104 Syringa |number=1105 |1106 Cydonia}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:Fragaria}}