Catalogue of the Solar System Small Bodies Orbital Evolution
Catalogue of the Solar System Small Bodies Orbital Evolution
Русский
English
Site
Asteroids catalogue
Comets catalogue
Information
Asteroid search
Summary information
Asteroids selection
Closest approaches
Approaches archive
Diagram 2D
Histogram
Impact probability
Potential hazardous
Asteroid information
General data
Initial data
Approaches
Asteroid orbit evolution
Tables
Graphs
3D animation
Calculation
Asteroid General Data
2021 PH
4
General information
Preliminary designation
2021 PH
4
Group
Apollo
Absolute magnitude
21.17
Approximate diameter (m)
150
Approximate mass (kg)
6.82·10
9
Number of observations
93
Arc length (days)
174
Approaches
No approaches found
Orbit initial data
Date of initial data
06/09/2026
M
– mean anomaly (degrees)
12.536583
a
– orbit major semiaxis (astronomical units)
2.71544200
e
– orbit eccentricity
0.64942400
ω
– orbit ascending node-perihelion angle (degrees)
330.546858
Ω
– longitude of orbit ascending node (degrees)
58.103352
i
– orbit inclination to the ecliptic plane (degrees)
6.731008
Details...
Orbital evolution
Date
M
a
e
ω
Ω
i
q
P
01/13/1829
207.123514
2.71194669
0.65208929
323.381772
63.651957
6.195467
0.94351530
4.466037
01/21/1858
30.241348
2.68824167
0.65986222
324.951660
62.309789
6.360337
0.91437254
4.407609
01/29/1887
226.044923
2.69571053
0.66083430
325.960723
61.359311
6.441641
0.91429254
4.425991
02/07/1916
66.533991
2.70609198
0.65666121
326.708573
60.965247
6.465526
0.92910634
4.451583
02/14/1945
259.599055
2.70626935
0.65512776
328.063105
60.002551
6.558033
0.93331718
4.452020
02/22/1974
91.280196
2.71167567
0.65176852
329.292481
59.085206
6.645103
0.94429082
4.465368
03/02/2003
276.757075
2.69914282
0.65743772
329.950895
58.544917
6.715815
0.92462453
4.434446
03/09/2032
93.868903
2.70123970
0.65621259
331.190678
57.637384
6.805628
0.92865220
4.439615
03/17/2061
273.640023
2.71761300
0.64975944
331.638778
57.312644
6.810260
0.95181831
4.480041
03/25/2090
99.875382
2.70816896
0.65242670
332.843801
56.446550
6.913080
0.94128721
4.456709
04/03/2119
291.490975
2.70506244
0.65450184
334.140855
55.567964
7.016916
0.93459410
4.449042
04/10/2148
128.189003
2.69630594
0.66045562
335.188791
54.862718
7.121856
0.91551552
4.427457
04/18/2177
320.251676
2.68942486
0.66179422
335.817179
54.324004
7.180977
0.90957904
4.410519
Detailed table...
Graphs...
3D animation...
Calculation on the date...
Return to objects selection
This project was supported by the Federal Agency of Education (project codes RNP 2.1.1.1689, RNP 2.1.1.745).
Samara State Technical University
Applied Mathematics and Information Science Department