1003 Lilofee

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1003 Lilofee
Discovery[1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date13 September 1923
Designations
(1003) Lilofee
Named after
Lilofee[2]
(mermaid in German folklore)
1923 OK · 1937 FB
1940 TA · 1951 QO
1951 RA2 · 1957 WD2
1962 QH · A915 HB
main-belt · (outer)
Themis[3][4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc93.81 yr (34,263 days)
Aphelion3.6414 AU
Perihelion2.6373 AU
3.1394 AU
Eccentricity0.1599
5.56 yr (2,032 days)
211.31°
0° 10m 37.92s / day
Inclination1.8402°
139.45°
317.42°
Physical characteristics
Dimensions27.29±1.83 km[5]
32.292±0.334 km[6]
33.1±3.3 km[7]
33.678±0.334 km[8]
34.04 km (calculated)[3]
36±4 km[9]
8.230±0.004 h[10]
8.24991±0.00005 h[11]
8.250±0.001 h[12][a]
8.2506±0.0003 h[10]
8.255±0.002 h[10]
0.07±0.01[9]
0.08±0.02[3][7]
0.130±0.020[8]
0.1406±0.0213[6]
0.198±0.028[5]
C[3]
10.20[5][6] · 10.50±0.22[13] · 10.70[3][7][9] · 10.8[1]

Lilofee (minor planet designation: 1003 Lilofee), provisional designation 1923 OK, is a carbonaceous Themistian asteroid from the outer regions of the asteroid belt, approximately 33 kilometers in diameter. It was discovered on 13 September 1923, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany.[14] The asteroid was named after the Black Forest mermaid "Lilofee" from German folklore.[2]

Orbit and classification

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Lilofee is a member of the Themis family (602),[3][4] a very large family of carbonaceous, low-inclination asteroids, named after 24 Themis.[15]: 23  It orbits the Sun in the outer main-belt at a distance of 2.6–3.6 AU once every 5 years and 7 months (2,032 days). Its orbit has an eccentricity of 0.16 and an inclination of 2° with respect to the ecliptic.[1]

The asteroid was first identified as A915 HB at Bergedorf Observatory in April 1915. The body's observation arc begins with its official discovery observation at Heidelberg.[14]

Physical characteristics

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Lilofee is an assumed carbonaceous C-type asteroid,[3] which corresponds to the overall spectral type of the Themis family.[15]: 23 

Lightcurves

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Since 2004, several rotational lightcurves of Lilofee were obtained from photometric observations by astronomers René Roy, Enric Forné and Robert Stephens. Lightcurve analysis gave a rotation period of 8.255 hours with a brightness variation of 0.57 magnitude (U=2+/3/3).[10][12][a]

In 2013, an international study modeled a lightcurve with a concurring period of 8.24991 hours and found a spin axis of (n.a., −99.0°) in ecliptic coordinates (λ, β).[11]

Diameter and albedo

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According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Lilofee measures between 27.29 and 36 kilometers in diameter and its surface has an albedo between 0.07 and 0.198.[5][6][7][8][9]

The Collaborative Asteroid Lightcurve Link adopts an albedo of 0.08 and calculates a diameter of 34.04 kilometers based on an absolute magnitude of 10.7.[3]

Naming

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This minor planet was named after the legendary mermaid/neck Lilofee, who lived in the small Mummelsee of the Black Forest in southwest Germany. Lilofee is also the title figure in the German folk-song The beautiful young Lilofee ("Die schöne junge Lilofee") by August Schnezler (1809–1853).[2]

The asteroid was named by the discoverer (RI 402). The name was proposed by ARI-astronomer Johannes Riem, after whom 1025 Riema was named. The official naming citation was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 96).[2]

Notes

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  1. ^ a b Lightcurve plot of (1003) Lilofee by R. D. Stephens (2013) at CS3. Rotation period 8.250±0.001 hours with a brightness amplitude of 0.54±0.02 mag. Summary figures at Collaborative Asteroid Lightcurve Link

References

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  1. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  2. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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  4. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  5. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (online, AcuA catalog p. 153)
  6. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  7. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  8. ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  9. ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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  11. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  12. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  13. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  14. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  15. ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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