( 99942) Apophis

(2004 MN4 )

Discovery Circumstances:

R. A. Tucker, D. J. Tholen, F. Bernardi - Kitt Peak

19 Jun 2004

(1)

Orbital Type:

AT

(*)( 2)( 3)( 4)( 5)( 6)( 7)( 8)( 9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)

Taxonomic Type:

Sq,Scomp

(21)(22)

Albedo:

0.30

(23)(24)(25)

Diameter:(km)

0.375

(26)(27)(28)

H:(mag)

19.09

(29)(30)

G:

0.24

(31)

U-B:(mag)

-

-

B-V:(mag)

-

-

V-R:(mag)

0.45

(32)

R-I:(mag)

-

-

Rotation Period:(hrs)

30.56

(33)(34)(35)

Quality:

3 !

(33)(34)(35)

Lightcurve Amplitude:(mag)

1.0

(33)(34)(35)

Spin Vector:

l=250,b=-75

(36)

Sense of Rotation:

ret

(37)

Radar Observations:

Y

(38)(39)(40)(41)

Spectral Observations:

Y

(42)(43)(44)(45)

IR Observations:

-

-

Remarks

* - orbital type derived from osculating orbital elements

! - quality code according to Lagerkvist et al. (1989) in "Asteroids II" (Eds. R.P.Binzel et al.),' Univ.Ariz.Press, Tucson, USA, pp. 1162-1179.

References

( 1) M.P.E.C. 2004-Y25

(002) Binzel, R.P. et al. (2007) DPS 39, 13.04. (Spectral Properties and Composition of Potentially Hazardous Asteroid (99942) Apophis)

(003) Giorgini, J.D. et al. (2008) Icarus 193, 1-19. (Predicting the Earth encounters of (99942) Apophis)

(004) Rubincam, D.P. (2007) Icarus 192, 460-468. (Orbital YORP and asteroid orbit evolution, with application to Apophis)

(005) Sokolov, L.L. et al. (2008) SSR 42, 18-27. (Peculiarities of the Motion of Asteroid 99942 Apophis)

(006) Chesley, S.R. et al. (2009) DPS 41, 4306. (An Updated Assessment Of The Impact Threat From 99942 Apophis)

(007) Tholen, D.J. et al. (2009) DPS 41, 4305. (Here is Apophis!)

(008) Ivashkin, V.V. & C.A. Stikhno (2009) Solar System Research 43, 483-496. (On the Prevention of a Possible Collision of Asteroid Apophis with the Earth)

(009) Wlodarczyk, I. (2007) Contrib. Astron. Obs. Skalnate Pleso 37, 69-82. (Selected OrbFit impact solutions for asteroids (99942) Apophis and (144898) 2004VD17)

(010) Wlodarczyk, I. (2008) Contrib. Astron. Obs. Skalnate Pleso 38, 21-32. (The impact orbits of the dangerous asteroid (99942) Apophis)

(011) Shor, V.A. et al. (2012) SSR 46, 119-129. (On the Impact of the Yarkovsky Effect on Apophis’ Orbit)

(012) Bancelin, D. et al. (2012) Astron. Astrophys. 544, A15. (Asteroid (99942) Apophis : New predictions of Earth encounters for this PHA)

(013) Bancelin, D. et al. (2012) DPS 44 210-02. (abstract) (Asteroid Apophis From Past, Present And Future Observations)

(014) Sokolov, L.L. et al. (2012) SSR 46, 291-300. (Impact Trajectories of the Asteroid Apophis in the 21st Century)

(015) Tholen, D.J. et al. (2013) Acta Astronautica 90,56-71. (Improved astrometry of (99942) Apophis)

(016) Wagner, S. & Wie, B. (2013) Acta Astronautica 90,72-79. (Robotic and human exploration/deflection mission design for asteroid 99942 Apophis)

(017) Wlodarczyk, I. (2013) MNRAS 434, 3055-3060. (The potentially dangerous asteroid (99942) Apophis)

(018) Howley, K.M. et al. (2014) LPSC 45, 2276. (ASTEROID THREAT MITIGATION: AN IN-DEPTH LOOK AT WHAT CAN BE DONE IN THREE REAL-OBJECT SCENARIOS)(2008EV5,99942,1998KY26)

(019) Souchay, J. et al. (2014) Astron. Astrophys. 563, A24. (Rotational changes of the asteroid 99942 Apophis during the 2029 close encounter with Earth)

(020) Yu, Y. et al. (2014) Icarus 242, 82-96. (Numerical predictions of surface effects during the 2029 close approach of Asteroid 99942 Apophis)

(021) Binzel, R.P. et al. (2009) Icarus 200, 480-485. (Spectral properties and composition of potentially hazardous Asteroid (99942) Apophis)

(022) DeMeo, F.E. et al. (2014) Icarus 227, 112-122. (Mars encounters cause fresh surfaces on some near-Earth asteroids) (contains taxonomic classification of 249 NEAs)

(023) Müller, T.G. et al. (2014) Astron. Astrophys. 566, A22. (Thermal Infrared Observations of Asteroid (99942) Apophis with Herschel)

(024) Müller, T. et al. (2013) New Size and Albedo for Apophis from IR Data obtained with Herschel Space Teles cope

(025) Delbo, M. et al. (2007) Icarus 188,266-269. (Albedo and size determination of potentially hazardous asteroids: (99942) Apophis)

(026) Müller, T.G. et al. (2014) Astron. Astrophys. 566, A22. (Thermal Infrared Observations of Asteroid (99942) Apophis with Herschel)

(027) Müller, T. et al. (2013) New Size and Albedo for Apophis from IR Data obtained with Herschel Space Teles cope

(028) Delbo, M. et al. (2007) Icarus 188,266-269. (Albedo and size determination of potentially hazardous asteroids: (99942) Apophis)

(029) Pravec, P. et al (2014) Icarus 233,48-60. (The tumbling spin state of (99942) Apophis)

(030) Delbo, M. et al. (2007) Icarus 188,266-269. (Albedo and size determination of potentially hazardous asteroids: (99942) Apophis)

(031) Pravec, P. et al (2014) Icarus 233,48-60. (The tumbling spin state of (99942) Apophis)

(032) Müller, T.G. et al. (2014) Astron. Astrophys. 566, A22. (Thermal Infrared Observations of Asteroid (99942) Apophis with Herschel)

(033) Pravec, P. et al (2014) Icarus 233,48-60. (The tumbling spin state of (99942) Apophis)

(034) R. Behrend Courbes des lumiere, Observatoire de Geneve website

(035) Oey, J. (2014) MPB 41, 276-280. (LIGHTCURVE ANALYSIS OF ASTEROIDS FROM BLUE MOUNTAINS OBSERVATORY IN 2013) (99942,163364,285263)

(036) Pravec, P. et al (2014) Icarus 233,48-60. (The tumbling spin state of (99942) Apophis)

(037) Pravec, P. et al (2014) Icarus 233,48-60. (The tumbling spin state of (99942) Apophis)

(038) JPL's NEO Radar Detection Program Webpage

(039) Ostro, S.J. et al. (2005) I.A.U. Circ. 8477. (2004 MN_4) Radar observations)

(040) Giorgini, J.D. et al. (2005) I.A.U. Circ. 8593. (99942 Apophis) (radar observations and orbital improvement)

(041) Benner, L.A.M. et al. (2006) I.A.U. Circ. 8711. ((99942) APOPHIS) (radar observations and orbital improvement)

(042) Binzel, R.P. et al. (2004) Meteorit. Planet. Sci. 39, 351-366. (Dynamical and compositional assessment of near-Earth object mission targets) (new spectra and taxonomy of 22 NEOs)

(043) Binzel, R.P. et al. (2006) LPSC 37, 1491. (The MIT-Hawaii-IRTF joint campaign for NEO spectral reconnaissance.)

(044) Binzel, R.P. et al. Webpage

(045) Binzel, R.P. et al. (2009) Icarus 200, 480-485. (Spectral properties and composition of potentially hazardous Asteroid (99942) Apophis)


NEODyS Page of ( 99942) Apophis