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Asteroids with Satellites Database--Johnston's Archive
2018 TF3
compiled by Wm. Robert Johnston
last updated30 December 2018--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: | 2.1359 AU | | orbital periodP: | 3.1216 yr
(= 1140.19 d) | | eccentricitye: | 0.71393 | | perihelion distanceq: | 0.611033 AU | | aphelion distanceQ: | 3.6608 AU | | inclinationi: | 6.8924° | | argument of perihelionω: | 75.6421° | | ascending nodeΩ: | 52.4167° | | mean anomalyM: | 40.153° | | perihelion passageTP: | 2018 Dec 20.8291 | | Epoch: | 2019 Apr 27 | | data arc: | 2018 Oct 6-31(171 obs.) | | Earth MOID: | 0.0199328 AU | | Jupiter Tisserand invariantTJ: | 3.327 |
orbital data, secondary: | semimajor axisas: | 0.35 km[*E] | | separation/primary radiusas/rp: | 2.6 [*E] | | separation/Hill radiusas/rH: | 0.008 [*E] | | orbital periodPs: | 0.438± 0.0002d [P18c] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 20.41 ± 0.36[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 0.28 km [*E] | | geometric albedo: | (0.16) [*A] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 45 km [*E] |
other data, primary: | diameterdp: | 0.27 km [*E] | | rotation periodRPp: | 2.4398± 0.0003h [P18c] | | amplitude in mag., rotationalΔM: | 0.18 [P18c] | | amplitude in mag., mutual eventsΔM: | 0.09 ±0.03 [P18c] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 0.06km [*E] | | axial ratiosa/b, b/c: | 1.5;? [P18c] | | diameter ratiods/dp: | 0.23± 0.02 [P18c] | | component mag. differenceΔM: | 3.2± 0.2 [*D] | | rotation periodRPs: | 2.3498± 0.0003h [P18c] | |
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-- 2018 TF3 --discovery and notes:
Primary discovered2018 Oct 06from Catalina Station, Arizona, USAby Catalina Sky Survey.
Companion discovered2018 Oct 15 by P. Pravec, P. Kusnirak, K. Hornoch, H. Kucakova, P. Fatkausinglightcurve observations from European Southern Observatory, La Silla.Announced2018 Oct 26 [P18c].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©2018by Wm. Robert Johnston.
Last modified30 December 2018.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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