1072 Malva

1072 Malva, provisional designation 1926 TA, is a dark background asteroid from the outer regions of the asteroid belt, approximately 48 kilometers in diameter. It was discovered on 4 October 1926, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Germany.[12] The asteroid was named after the flowering plant Malva (mallow).[3]

1072 Malva
Discovery [1]
Discovered byK. Reinmuth
Discovery siteHeidelberg Obs.
Discovery date4 October 1926
Designations
(1072) Malva
Pronunciation/ˈmælvə/[2]
Named after
Malva (flowering plant)[3]
1926 TA · 1949 UU
main-belt · (outer) [4]
background [5]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc91.08 yr (33,267 days)
Aphelion3.9291 AU
Perihelion2.4010 AU
3.1650 AU
Eccentricity0.2414
5.63 yr (2,057 days)
355.23°
0° 10m 30s / day
Inclination8.0234°
37.077°
25.996°
Physical characteristics
Dimensions44.97 km (derived)[4]
45.05±1.8 km[6]
47.48±0.87 km[7]
53.183±1.087 km[8]
53.675±0.343 km[9]
9.0127±0.0003 h[10]
10.080±0.005 h[11][lower-alpha 1]
0.032±0.005[9]
0.0394±0.0050[8]
0.0458 (derived)[4]
0.050±0.002[7]
0.0549±0.005[6]
C (assumed)[4]
10.50[6][7][8] · 10.70[4][9] · 10.8[1]

    Orbit and classification

    Malva is a non-family asteroid from the main belt's background population.[5] It orbits the Sun in the outer asteroid belt at a distance of 2.4–3.9 AU once every 5 years and 8 months (2,057 days; semi-major axis of 3.17 AU). Its orbit has an eccentricity of 0.24 and an inclination of 8° with respect to the ecliptic.[1] The body's observation arc begins with its official discovery observation at Heidelberg in October 1926.[12]

    Physical characteristics

    Malva is an assumed C-type asteroid.[4]

    Rotation period

    Observations performed by Brian Warner at the Palmer Divide Observatory in Colorado Springs, Colorado, during 2007 produced a lightcurve with a period of 10.080 ± 0.005 hours and a brightness range of 0.17 ± 0.02 in magnitude (U=3).[11][lower-alpha 1] Another lightcurve obtained by Italian amateur astronomers Roberto Crippa and Federico Manzini at the Sozzago Astronomical Station (A12) gave a period of 9.0127 hours with an amplitude of 0.17 magnitude (U=2).[10]

    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, Malva measures between 45.05 and 53.675 kilometers in diameter and its surface has an albedo between 0.032 and 0.0549.[6][7][8][9]

    The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0458 and a diameter of 44.97 kilometers based on an absolute magnitude of 10.7.[4]

    Naming

    This minor planet was named after the genus of flowering plants, Malva, also known as mallow. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 101).[3]

    Reinmuth's flowers

    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), and 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).[13]

    Notes
    1. Lightcurve plot of 1072 Malva, Palmer Divide Observatory, B. D. Warner (2007). Summary figures at the LCDB

    References
    1. "JPL Small-Body Database Browser: 1072 Malva (1926 TA)" (2017-11-02 last obs.). Jet Propulsion Laboratory. Retrieved 7 December 2017.
    2. "malva". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
    3. Schmadel, Lutz D. (2007). "(1072) Malva". Dictionary of Minor Planet Names – (1072) Malva. Springer Berlin Heidelberg. p. 92. doi:10.1007/978-3-540-29925-7_1073. ISBN 978-3-540-00238-3.
    4. "LCDB Data for (1072) Malva". Asteroid Lightcurve Database (LCDB). Retrieved 7 December 2017.
    5. "Asteroid 1072 Malva – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 28 October 2019.
    6. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
    7. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 17 October 2019. (online, AcuA catalog p. 153)
    8. Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
    9. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 7 December 2017.
    10. Behrend, Raoul. "Asteroids and comets rotation curves – (1072) Malva". Geneva Observatory. Retrieved 7 December 2017.
    11. Warner, Brian D. (September 2007). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - December 2006 - March 2007". The Minor Planet Bulletin. 34 (3): 72–77. Bibcode:2007MPBu...34...72W. ISSN 1052-8091. Retrieved 7 December 2017.
    12. "1072 Malva (1926 TA)". Minor Planet Center. Retrieved 7 December 2017.
    13. 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.

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