A three-dimensional model of 32 Pomona based on its light curve
Discovery
Discovered by
H. Goldschmidt
Discovery date
26 October 1854
Designations
MPC designation
(32) Pomona
Pronunciation
/pəˈmoʊnə/[1]
Named after
Pōmōna
Alternative designations
A899 QA; A911 KF; 1945 RB; 1949 SH; 1950 YD
Minor planet category
Main belt
Adjectives
Pomonian /pəˈmoʊniən/
Orbital characteristics[2]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion
419.316 Gm (2.803 AU)
Perihelion
354.967 Gm (2.373 AU)
Semi-major axis
387.142 Gm (2.588 AU)
Eccentricity
0.083
Orbital period (sidereal)
1520.602 d (4.16 a)
Mean anomaly
46.086°
Inclination
5.530°
Longitude of ascending node
220.574°
Time of perihelion
2023-Feb-05
Argument of perihelion
339.680°
Physical characteristics
Dimensions
80.76±1.6 km[2]
Mass
(8.88 ± 4.17/1.67)×1017 kg[3]
Mean density
3.102 ± 1.455/0.584 g/cm3[3][a]
Synodic rotation period
0.3937 d (9.448 h)[2]
Geometric albedo
0.2564[2]
Spectral type
S[2]
Absolute magnitude (H)
7.79[2]
Pomona (/pəˈmoʊnə/ⓘpə-MOH-nə;[4] minor planet designation: 32 Pomona) is a stony main-belt asteroid that is 81 kilometres (50 mi) in diameter. It was discovered by German-French astronomer Hermann Mayer Salomon Goldschmidt on October 26, 1854,[5] and is named after Pōmōna, the Roman goddess of fruit trees.
Photometric observations of this asteroid gave a light curve with a synodic rotation period of 9.448 hours. The data was used to construct a model for the asteroid, revealing it to be an angular object that is spinning about a pole with ecliptic coordinates (β, λ) = (+58°, 267°). The ratio of the major to minor axes' lengths is roughly equal to 1.3.[6]
The spectrum of 32 Pomona matches an S-type in the Tholen classification system, and is similar to primitive achondrite meteorites.[7] Measurements of the thermal inertia of 32 Pomona give a value of around 20–120 m−2 K−1 s−1/2, compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere.[8]
^Noah Webster (1884) A Practical Dictionary of the English Language
^ abcdefCite error: The named reference jpldata was invoked but never defined (see the help page).
^ abCite error: The named reference FiengaEtAl2020 was invoked but never defined (see the help page).
^"Pomona". Collins English Dictionary. Archived from the original on 7 April 2021. Retrieved 7 April 2021.
^Cite error: The named reference IAU_MPC was invoked but never defined (see the help page).
^Cite error: The named reference Kaasalainen2002 was invoked but never defined (see the help page).
^Cite error: The named reference Hiroi1993 was invoked but never defined (see the help page).
^Cite error: The named reference Delbo2009 was invoked but never defined (see the help page).
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