| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 5 January 1924 |
| Designations | |
| (1011) Laodamia | |
| Pronunciation | /ˌleɪ.oʊdəˈmaɪə/ |
Named after | ΛαοδάμειαLāodamīa (Greek mythology)[2] |
| 1924 PK · 1939 FG 1958 OC | |
| Mars crosser[1][3][4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 93.50 yr (34,150 days) |
| Aphelion | 3.2315AU |
| Perihelion | 1.5535 AU |
| 2.3925 AU | |
| Eccentricity | 0.3507 |
| 3.70yr (1,352 days) | |
| 88.023° | |
| 0° 15m 58.68s / day | |
| Inclination | 5.4939° |
| 132.53° | |
| 353.34° | |
| Physical characteristics | |
| Dimensions | 7.39 km(derived)[4] 7.56±0.76 km[5] |
| 5.17h[6] 5.17247±0.00007 h[7] 5.175±0.005 h[a] | |
| 0.248±0.050[5] 0.259[8] | |
| Tholen =S[1] · S[4][9] SMASS = Sr[1] B–V = 0.900[1] U–B = 0.515[1] V–R =0.324±0.171[10] | |
| 12.00[9] · 12.416±0.171[10] · 12.74[1][4][5] · 13.09±0.23[11] | |
Laodamia (minor planet designation:1011 Laodamia), provisional designation1924 PK, is a stonyasteroid and sizableMars-crosser near the innermost regions of theasteroid belt, approximately 7.5 kilometers in diameter. It was discovered on 5 January 1924, by German astronomerKarl Reinmuth at theHeidelberg-Königstuhl State Observatory in southwest Germany.[3] The asteroid was named afterLaodamia from Greek mythology.[2]
Laodamia is aMars-crossing asteroid, a dynamically unstable group between the main belt and thenear-Earth populations, crossing the orbit of Mars at 1.666 AU. It orbits the Sun at a distance of 1.6–3.2 AU once every 3 years and 8 months (1,352 days). Its orbit has aneccentricity of 0.35 and aninclination of 5° with respect to theecliptic.[1]
The body'sobservation arc begins 15 years after its official discovery observation with its identification1939 FG atTurku Observatory in March 1939.[3] On 5 September 2083, it will pass 0.06186 AU (9,254,000 km; 5,750,000 mi) from Mars.[1]
In theTholen classification,Laodamia is a stonyS-type asteroid, while in theSMASS taxonomy, it is a transitional type between the stony S-type and rareR-type asteroids.[1]
In March 2002, a rotationallightcurve ofLaodamia was obtained from photometric observations by French amateur astronomersLaurent Bernasconi andSilvano Casulli. Lightcurve analysis gave a well-definedrotation period of 5.17247 hours with a brightness amplitude of 0.44magnitude (U=3).[7] Two other lightcurve gave a concurring period of 5.17 and 5.175 hours, respectively (U=2+/3).[6][a]
Photometry taken at theRozhen Observatory over a period of more than a decade allowed to model the asteroid's shape and gave two spin axis of (95.0°, −85.5°) and (272.0°, −88.0°) inecliptic coordinates (λ, β) (U=n.a.).[10]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer and its subsequentNEOWISE mission,Laodamia measures 7.56 kilometers in diameter and its surface has analbedo of 0.248,[5] while theCollaborative Asteroid Lightcurve Link adopts an albedo of 0.259 and derives a diameter of 7.39 kilometers based on anabsolute magnitude of 12.74.[4]
This makesLaodamia one of the largest mid-sizedMars-crossing asteroids comparable with1065 Amundsenia (9.75 km),1139 Atami (9.35 km),1474 Beira (14.9 km),1727 Mette (5.44 km),1131 Porzia (7.13 km),1235 Schorria (5.55 km),985 Rosina (8.18 km),1310 Villigera (15.24 km) and1468 Zomba (7 km), but far smaller than the largest members of this dynamical group, namely,132 Aethra,323 Brucia,1508 Kemi,2204 Lyyli and512 Taurinensis, which are all larger than 20 kilometers in diameter.
Thisminor planet was named afterLaodamia from Greek mythology.[2] The asteroid's name was proposed by Russian astronomer Nikolaj Vasil'evich Komendantov (RI 740),see(3958).[2]
The name either refers to the daughter of Akastos, who was the wife of Protesilaos,see(3540), and killed in theTrojan War, as narrated by Euripides,see(2930). It may also refer to the daughter of Bellerophon,see(1808) and the wife of Sarpedon, see(2223). She was killed by the arrows of Artemis,see(105). (Source of name researched by the author of theDictionary of Minor Planet Names,Lutz D. Schmadel).[2]
