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Asteroids with Satellites Database--Johnston's Archive
2013 WT44
compiled by Wm. Robert Johnston
last updated9 October 2021--Orbital and physical data--
(Seethis page for definitions of quantities; source codes in brackets, seethis link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)
dynamical type, primary:NEA, Apollo(PHA)
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 2.259906481 AU | | orbital periodP: | 3.39737826 yr
(= 1240.892411 d) | | eccentricitye: | 0.568187098 | | perihelion distanceq: | 0.975856776 AU | | aphelion distanceQ: | 3.54395619 AU | | inclinationi: | 12.2060148° | | argument of perihelionω: | 325.794417° | | ascending nodeΩ: | 182.7280864° | | mean anomalyM: | 59.019493° | | perihelion passageTP: | 2020 Dec 09.56433 | | Epoch: | 2021 Jul 01 | | data arc: | 2013-2020(533 obs.) | | Earth MOID: | 0.033589 AU | | Jupiter Tisserand invariantTJ: | 3.363 |
orbital data, secondary: | semimajor axisas: | ? | | orbital periodPs: | ? | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 19.3[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 1.32± 0.11 km [M14b] | | geometric albedo: | 0.019± 0.004[M14b] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 76 km [*E] |
other data, primary: | diameterdp: | 1± 0.1 km [B14b] | | rotation periodRPp: | 2.8849± 0.0006h [W14e] | | amplitude in mag., rotationalΔM: | 0.05 [W14e] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 0.25km [*E] | | diameter ratiods/dp: | 0.25 [*E] | | component mag. differenceΔM: | 3.01 [*E] | | rotation periodRPs: | ? | |
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-- 2013 WT44 --discovery and notes:
Primary discovered2013 Nov 27from Catalina Station, Arizona, USAby Catalina Sky Survey.
Companion discovered2014 Mar 20usingradar observations from Goldstone Observatory, California, USA; Arecibo Observatory, Puerto Rico.Announced2014 Mar 22.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©2014, 2021by Wm. Robert Johnston.
Last modified9 October 2021.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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