![]() |
Celestial calendar Visibility of Small Solar-System Bodies |
|
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 |
Magnitude |
Diameter |
Mean |
Daily |
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 |
Apparent |
Visual |
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 |
Apparent |
Visual |
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 |
Apparent |
Visual |
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. |
![]() |
Note:
All time moments are given in Universal Time (UT) units. |