(433) Eros Celestial     calendar

Visibility of Small Solar-System Bodies
(Asteroids) in 2008:

On August 24, 2006, astronomers at the 26th General Assembly of the International Astronomical Union in Prague declare that (1) Ceres is no longer a asteroid. Now Ceres will be known as "dwarf planet".

 

Name

Opposition
Date

Magnitude
(max)

Diameter
(km)

Mean
Distance (AU)

Daily
Motion

Eccentricity

(15) Eunomia

Jan. 10, 2008

+8.2m

320

2.64

0.23o

0.19

(6) Hebe

Feb. 7

+8.8m

190

2.42

0.26o

0.20

(5) Astraea

Apr. 6

+9.4m

120

2.57

0.24o

0.19

(7) Iris

Apr. 9

+9.4m

211

2.38

0.27o

0.23

(20) Massalia

June 11

+9.9m

145

2.41

0.26o

0.14

(3) Juno

June 12

+10.1m

274

2.67

0.23o

0.26

(11) Parthenope

Aug. 6

+8.8m

153

2.45

0.26o

0.10

(4) Vesta

Oct. 30

+6.4m

512

2.36

0.27o

0.09

(9) Metis

Nov. 4

+8.5m

209

2.39

0.27o

0.12

(2) Pallas

Dec. 4

+8.0m

524

2.77

0.21o

0.23

(40) Harmonia

Jan. 12, 2009

+9.5m

108

2.27

0.29o

0.05

(27) Euterpe

Feb. 4

+8.8m

118

2.35

0.27o

0.17

(15) Eunomia

January 10, 2008 at opposition

Date

Apparent
Right Ascension

Apparent
Declination

Visual
Magnitude

Distance

from Sun (AU)

from Earth (AU)

Dec. 16, 2007

7h 53.3m

+24o 19'

+8.8m

2.41

1.52

Jan. 15, 2008

7h 21.8m

+22o 58'

+8.3m

2.47

1.49

Feb. 14

6h 57.6m

+21o 15'

+9.2m

2.53

1.70

Mar. 15

7h 00.0m

+19o 38'

+9.9m

2.59

2.08

(4) Vesta

October 30, 2008 at opposition

Date

Apparent
Right Ascension

Apparent
Declination

Visual
Magnitude

Distance

from Sun (AU)

from Earth (AU)

July 23, 2008

2h 29.2m

+6o 53'

+7.9m

2.45

2.35

Aug. 12

2h 48.3m

+7o 30'

+7.7m

2.47

2.12

Sept. 1

2h 59.6m

+7o 21'

+7.4m

2.48

1.89

Sept. 21

3h 00.6m

+6o 27'

+7.1m

2.50

1.70

Oct. 11

2h 50.3m

+5o 00'

+6.7m

2.51

1.57

Oct. 31

2h 31.8m

+3o 34'

+6.4m

2.52

1.54

Nov. 20

2h 13.3m

+2o 52'

+6.8m

2.53

1.62

Dec. 10

2h 02.5m

+3o 20'

+7.2m

2.54

1.79

Dec. 30

2h 02.6m

+4o 49'

+7.6m

2.55

2.02

Jan. 19, 2009

2h 12.5m

+7o 01'

+7.9m

2.56

2.29

Feb. 8

2h 30.1m

+9o 36'

+8.1m

2.56

2.56

(2) Pallas

December 4, 2008 at opposition

Date

Apparent
Right Ascension

Apparent
Declination

Visual
Magnitude

Distance

from Sun (AU)

from Earth (AU)

Oct. 11, 2008

5h 27.4m

-19o 04'

+8.5m

2.39

1.85

Nov. 10

5h 30.3m

-27o 58'

+8.1m

2.33

1.64

Dec. 10

5h 09.6m

-32o 47'

+8.0m

2.27

1.56

Jan. 9, 2009

4h 47.9m

-30o 14'

+8.1m

2.22

1.61

Feb. 8

4h 50.2m

-22o 15'

+8.3m

2.18

1.74

 

 

Glossary

Astronomical Unit (AU):

middle distance between Earth and Sun, equal 149.6 millions km.

Eccentricity:

a parameter that specifies the shape of a conic section; one of the standard elements used to describe an elliptic orbit.

Mean Distance:

the semimajor axis of an elliptic orbit.

Opposition:

a configuration of the Sun, Earth and a planet in which the apparent geocentric longitude of the planet differs by 180o from the apparent geocentric longitude of the Sun.

Semimajor Axis:

half the length of the major axis of an ellipse; a standard element used to describe an elliptical orbit.

 

Main Astronomical Observatory

Note: All time moments are given in Universal Time (UT) units.
For Kyiv Local_Time=UT+2h (and Local_Time=UT+3h for summer time).