1066 Lobelia, provisional designation 1926 RA, is a bright background asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 1 September 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Germany.[3] The asteroid was named after the flowering plant Lobelia (lobelias).[2]

1066 Lobelia
Discovery [1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date1 September 1926
MPC designation(1066) Lobelia
Named after
Lobelia (flowering plant)[2]
1926 RA · 1941 SK
1965 AL1 · A911 QB
main-belt[1][3] · (inner)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc106.28 yr (38,818 d)
Aphelion2.9050 AU
Perihelion1.8990 AU
2.4020 AU
3.72 yr (1,360 days)
0° 15m 52.92s / day
Physical characteristics
Dimensions6.014±0.404 km[5]

Orbit and classificationEdit

Lobelia is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the inner main-belt at a distance of 1.9–2.9 AU once every 3 years and 9 months (1,360 days; semi-major axis of 2.40 AU). Its orbit has an eccentricity of 0.21 and an inclination of 5° with respect to the ecliptic.[1]

The asteroid was first observed at Heidelberg as A911 QB in August 1911. The body's observation arc begins at Simeiz Observatory in October 1926, one month after its official discovery observation at Heidelberg.[3]

Physical characteristicsEdit

The asteroid's spectral type is unknown.

Rotation periodEdit

As of 2017, no rotational lightcurve of Lobelia was obtained from photometric observations. The body's rotation period, spin axis and shape remain unknown.[1][6]

Diameter and albedoEdit

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Lobelia measures 6.014 kilometers in diameter and its surface has a high albedo of 0.488.[5]


This minor planet was named after the Indian tobacco flower, Lobelia, a genus of flowering plants also known as lobelias.[2] The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 101).[2]

Reinmuth's flowersEdit

Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between (1009) and (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).[7]


  1. ^ a b c d e f "JPL Small-Body Database Browser: 1066 Lobelia (1926 RA)" (2017-11-28 last obs.). Jet Propulsion Laboratory. Retrieved 11 December 2017.
  2. ^ a b c d Schmadel, Lutz D. (2007). "(1066) Lobelia". Dictionary of Minor Planet Names – (1066) Lobelia. Springer Berlin Heidelberg. p. 91. doi:10.1007/978-3-540-29925-7_1067. ISBN 978-3-540-00238-3.
  3. ^ a b c "1066 Lobelia (1926 RA)". Minor Planet Center. Retrieved 11 December 2017.
  4. ^ a b "Asteroid 1066 Lobelia – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 28 October 2019.
  5. ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 11 December 2017.
  6. ^ "LCDB Data for (1066) Lobelia". Asteroid Lightcurve Database (LCDB). Retrieved 11 December 2017.
  7. ^ Schmadel, Lutz D. (2007). "(1054) Forsytia". Dictionary of Minor Planet Names – (1054) Forsytia. Springer Berlin Heidelberg. p. 90. doi:10.1007/978-3-540-29925-7_1055. ISBN 978-3-540-00238-3.

External linksEdit