1287 Lorcia, provisional designation 1933 QL, is an Eoan asteroid from the outer regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle on 25 August 1933.[5] The asteroid was named for Laura de Sołohub Dikyj, wife of Polish astronomer Tadeusz Banachiewicz.[2]

1287 Lorcia
Discovery [1]
Discovered byS. Arend
Discovery siteUccle Obs.
Discovery date25 August 1933
MPC designation(1287) Lorcia
Named after
Laura de Sołohub Dikyj [2]
(wife of Tadeusz Banachiewicz)
1933 QL · 1954 TG
main-belt · (outer)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc83.30 yr (30,426 days)
Aphelion3.2024 AU
Perihelion2.8214 AU
3.0119 AU
5.23 yr (1,909 days)
0° 11m 18.96s / day
Physical characteristics
Dimensions21.678±0.101 km[4]
B–V = 0.850 [1]
U–B = 0.360 [1]

Orbit and classificationEdit

Lorcia is a member the Eos family (606),[3] the largest asteroid family in the outer main belt consisting of nearly 10,000 asteroids.[6]:23 It orbits the Sun in the outer main-belt at a distance of 2.8–3.2 AU once every 5 years and 3 months (1,909 days). Its orbit has an eccentricity of 0.06 and an inclination of 10° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Uccle.[5]

Physical characteristicsEdit

Rotation periodEdit

As of 2017, no rotational lightcurve of Lorcia has been obtained from photometric observations. The asteroid's rotation period, poles and shape remain unknown.[7]

Diameter and albedoEdit

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Lorcia measures 21.678 kilometers in diameter and its surface has an albedo of 0.140.[4]


This minor planet was named by Polish astronomer Tadeusz Banachiewicz (1882–1954) after his wife Laura de Sołohub Dikyj. Banachiewicz was also a prominent mathematician and geodesist, as well as the vice-president of the International Astronomical Union in the 1930s. The asteroid 1286 Banachiewicza, also discovered by Sylvain Arend, was named in his honor. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 118).[2]


  1. ^ a b c d e f "JPL Small-Body Database Browser: 1287 Lorcia (1933 QL)" (2016-12-13 last obs.). Jet Propulsion Laboratory. Retrieved 19 September 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(1287) Lorcia". Dictionary of Minor Planet Names – (1287) Lorcia. Springer Berlin Heidelberg. p. 106. doi:10.1007/978-3-540-29925-7_1288. ISBN 978-3-540-00238-3.
  3. ^ a b "Asteroid 1287 Lorcia – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
  4. ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 19 September 2017.
  5. ^ a b "1287 Lorcia (1933 QL)". Minor Planet Center. Retrieved 19 September 2017.
  6. ^ Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). Identification and Dynamical Properties of Asteroid Families. Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
  7. ^ "LCDB Data for (1287) Lorcia". Asteroid Lightcurve Database (LCDB). Retrieved 19 September 2017.

External linksEdit