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Table 2

Test asteroids and their mutual encounter events used for the mass determination of (223) Rosa, ordered by encounter date.

Test asteroid Encounter date r au v km s−1 D2 km P km s Obs. arc yyyy.mm M223 1017 kg
(78824) 2003 QS13 2001-06-26.93 0.0002 2.837 1.8 8.1 ± 2.3 1960.09 – 2021.12
(35525) 1998 FV64 2010-12-31.87 0.0004 2.043 3.9 5.3 ± 1.5 1990.09 – 2021.11 5.32 ± 2.17
(315162) 2007 FL24 2016-07-04.05 0.0027 0.131 1.8 12.3 ± 3.5 1999.11 – 2021.11 3.15 ± 1.14

Notes. Given are the designation of the test asteroid, the date of the encounter, the minimum Euclidean distance r between Rosa and the test asteroid, the relative encounter velocity v, the diameter D2 of the test asteroid (either taken from the orbital elements file astorb.dat (https://asteroid.lowell.edu/main/astorb/) or calculated from the absolute magnitude H), the perturbation parameter P, the time span covered by the astrometric observations filed at the MPC (https://www.minorplanetcenter.net/, at date 2021 Dec. 10), and the derived mass value M223 for Rosa.

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