Girish Mahajan (Editor)

(126154) 2001 YH140

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Discovery date  18 December 2001
Minor planet category  TNO (3:5 resonance)
Aphelion  48.725 AU (7.2892 Tm)
MPC designation  (126154) 2001 YH140
Observation arc  4777 days (13.08 yr)
Discovered by  Michael E. Brown, Chadwick A. Trujillo

(126154) 2001 YH140, also written as (126154) 2001 YH140, is a resonant trans-Neptunian object discovered on December 18, 2001 by C. A. Trujillo, M. E. Brown.


Orbit and rotation

(126154) 2001 YH140 is locked in 3:5 mean-motion resonance with Neptune. When it makes three revolutions around the Sun, Neptune makes exactly five. The rotation period of (126154) 2001 YH140 is estimated to be 13.25 ± 0.2 hours.

Physical characteristics

In 2010 thermal flux from (126154) 2001 YH140 in the far-infrared was measured by the Herschel Space Telescope. As a result, its size has been estimated to be 300–390 km (190–240 mi).


(126154) 2001 YH140 Wikipedia