( 2212) Hephaistos

(1978 SB )

Discovery Circumstances:

L. I. Chernykh - Crimea-Nauchnij

27 Sep 1978

(1)

Orbital Type:

AP

(*)( 2)( 3)

Taxonomic Type:

SG;Sq/Q

( 4)( 5)( 6)( 7)

Albedo:

0.216

( 8)( 9)(10)(11)

Diameter:(km)

6.64 km

(12)(13)(14)

H:(mag)

13.525

(15)(16)

G:

0.23

(17)(18)

U-B:(mag)

0.41

(19)

B-V:(mag)

0.77

(19)

V-R:(mag)

0.36

(20)

R-I:(mag)

0.34

(21)

Rotation Period:(hrs)

>20.

(22)(23)

Quality:

1 !

(22)(23)

Lightcurve Amplitude:(mag)

0.08-0.11

(22)(23)

Spin Vector:

-

-

Sense of Rotation:

-

-

Radar Observations:

-

-

Spectral Observations:

Y

(24)(25)

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) I.A.U.Circ. 3279

(002) Milani, A. et al. (1989) Icarus 78, 212-269. (Dynamics of planet-crossing asteroids - Classes of orbital behavior - project Spaceguard)

(003) Dave, R. et al. (2010) DPS 42, 1324. (abstract) (Thermal Emission Spectroscopy (5.2 To 38 Microns) And Analysis Of 10 Near-earth Asteroids) (1612,1580,433,2212,1685,1917,1566,3200,7092,1866)

(004) Tholen, D.J. (1989) in "Asteroids II" (Eds. R.P.Binzel et al.), Univ.Ariz.Press, Tucson, USA, pp. 1139-1150.

(005) Thomas, C.A. et al. (2011) Astron. J. 142, 85. (ExploreNEOs. V. AVERAGE ALBEDO BY TAXONOMIC COMPLEX IN THE NEAR-EARTH ASTEROID POPULATION) (new albedos data for 118 NEOs)

(006) Luu, J.X. & D.C. Jewitt (1990) Astron. J. 99, 1985-2011. (Charge-coupled device spectra of asteroids. I - Near-earth and 3:1 resonance asteroids) 19 NEOs

(007) 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)

(008) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)

(009) Thomas, C.A. et al. (2011) Astron. J. 142, 85. (ExploreNEOs. V. AVERAGE ALBEDO BY TAXONOMIC COMPLEX IN THE NEAR-EARTH ASTEROID POPULATION) (new albedos data for 118 NEOs)

(010) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs)

(011) Binzel, R.P. et al. (2002) in "Asteroids III" (Eds. W.F.Bottke et al.), Univ.Ariz.Press, Tucson, USA, pp. 255-271. (Physical Properties of NEOs)

(012) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)

(013) Mainzer, A. et al. (2011) ApJ 743, 156. (NEOWISE Observations of Near-Earth Objects: Preliminary Results) (albedo and diameters of 428 NEOs)

(014) Binzel, R.P. et al. (2002) in "Asteroids III" (Eds. W.F.Bottke et al.), Univ.Ariz.Press, Tucson, USA, pp. 255-271. (Physical Properties of NEOs)

(015) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)

(016) Wisniewski, W.Z. et al. (1997) Icarus 126, 395-449. (Photometric Observations of 125 Asteroids)

(017) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations)

(018) Wisniewski, W.Z. et al. (1997) Icarus 126, 395-449. (Photometric Observations of 125 Asteroids)

(019) Tedesco, E.F. & J.Gradie (1987) Astron. J. 93, 738-746. (Discovery of M class objects among the near-earth asteroid population)

(020) Pravec, P. et al. (1997) Icarus 130, 275-286. (The Near-Earth Objects Follow-Up Program. II. Results for 8 Asteroids from 1982 to 1995)(1943,2102,2212,3199,5751,6322,7474, 1989VA)

(021) Pravec, P. et al. (1997) Icarus 130, 275-286. (The Near-Earth Objects Follow-Up Program. II. Results for 8 Asteroids from 1982 to 1995)(1943,2102,2212,3199,5751,6322,7474, 1989VA)

(022) Pravec, P. et al. (1997) Icarus 130, 275-286. (The Near-Earth Objects Follow-Up Program. II. Results for 8 Asteroids from 1982 to 1995)(1943,2102,2212,3199,5751,6322,7474, 1989VA)

(023) Wisniewski, W.Z. et al. (1997) Icarus 126, 395-449. (Photometric Observations of 125 Asteroids)

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

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


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