1582 Martir

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1582 Martir
001582-asteroid shape model (1582) Martir.png
Shape model of Martir from its lightcurve
Discovery [1]
Discovered by M. Itzigsohn
Discovery site La Plata Obs.
Discovery date15 June 1950
Designations
(1582) Martir
Named after
 Eva Perón
(First Lady of Argentina) [2]
1950 LY
main-belt  ·(outer) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 67.05 yr (24,490 days)
Aphelion 3.5573 AU
Perihelion 2.7521 AU
3.1547 AU
Eccentricity 0.1276
5.60 yr (2,047 days)
29.638°
0° 10m 33.24s / day
Inclination 11.608°
93.914°
128.10°
Physical characteristics
Dimensions34.42±10.19 km [4]
36.32±0.56 km [5]
36.69 km (derived) [3]
36.79±2.6 km [6]
37.06±12.76 km [7]
37.252±0.111 km [8]
39.47±0.46 km [9]
39.969±0.292 km [10]
9.84±0.01 h [11] [lower-alpha 1]
15.665±0.004 h (dated) [12]
15.757±0.005 h (dated) [13]
0.038±0.010 [9]
0.04±0.03 [7]
0.0435 (derived) [3]
0.0483±0.0057 [10]
0.05±0.04 [4]
0.054±0.008 [8]
0.0570±0.009 [6]
0.060±0.002 [5]
C [3] [14]
10.90 [5] [6] [10]  ·11.20 [3] [7] [9]  ·11.26 [4]  ·11.3 [1]  ·11.35±0.29 [14]

    1582 Martir, provisional designation 1950 LY, is a carbonaceous background asteroid from the outer regions of the asteroid belt, approximately 37 kilometers in diameter. It was discovered on 15 June 1950, by Argentine astronomer Miguel Itzigsohn at the La Plata Astronomical Observatory in Argentina. [15] The asteroid was named after the First Lady of Argentina, Eva Perón. [2]

    Contents

    Orbit and classification

    Martir is a background asteroid that does not belong to any known asteroid family. It orbits the Sun in the outer main-belt at a distance of 2.8–3.6  AU once every 5 years and 7 months (2,047 days). Its orbit has an eccentricity of 0.13 and an inclination of 12° with respect to the ecliptic. [1] The body's observation arc begins at the discovering observatory with its official discovery observation. [15]

    Physical characteristics

    Martir has been characterized as a carbonaceous C-type asteroid by PanSTARRS photometric survey. [14]

    Rotation period

    In May 2000, a rotational lightcurve of Martir was obtained from photometric observations by American astronomer Brian Warner at his Palmer Divide Observatory ( 716 ) in Colorado. After a review of the previous lightcurve analysis, a half-period solution with a fit on a monomodal lightcurve gave a revised rotation period of 9.84 hours with a brightness amplitude of 0.31 magnitude ( U=2 ). [11] [lower-alpha 1] This result supersedes two previous analysis that gave a period of 15.665 and 15.757 hours. [12] [13]

    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, Martir measures between 34.42 and 39.969 kilometers in diameter and its surface has an albedo between 0.038 and 0.060. [4] [5] [6] [7] [8] [9] [10]

    The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0435 and a diameter of 36.69 kilometers based on an absolute magnitude of 11.2. [3]

    Naming

    This minor planet was named in homage to the First Lady of Argentina, Eva Perón (1919–1952). The name translates from Spanish to "martyr" and refers to her efforts towards social justice. The official naming citation was published by the Minor Planet Center in January 1953 ( M.P.C. 877). [2] [16] The discoverer also named the asteroids 1569 Evita, 1581 Abanderada, 1588 Descamisada and 1589 Fanatica in tribute to Perón.

    Notes

    1. 1 2 Lightcurve plot of 1582 Martir, Palmer Divide Observatory, B. D. Warner (2000), reviewed period of 9.84 hours

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    References

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    11. 1 2 Warner, Brian D. (October 2010). "Upon Further Review: II. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory". The Minor Planet Bulletin. 37 (4): 150–151. Bibcode:2010MPBu...37..150W. ISSN   1052-8091 . Retrieved 6 September 2017.
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    15. 1 2 "1582 Martir (1950 LY)". Minor Planet Center. Retrieved 6 September 2017.
    16. ↑ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. Bibcode:2009dmpn.book.....S. doi:10.1007/978-3-642-01965-4. ISBN   978-3-642-01964-7.
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