Asteroids

1862 Apollo help

Last update: 2026-04-01 13:00 UTC

Orbital Properties

Epoch

61200.0

MJD

Orbit type

Apollo

Perihelion (q)

0.647

Aphelion (Q)

2.295

Eccentricity (e)

0.560

Inclination (i)

6.4

deg

Orbit period (P)

651.5

Earth MOID

0.02632

U parameter

0.0

A₂

-3.8

10^-15au/days²

Next Earth close approach

Date

2046-11-13

Nominal distance (from Earth center)

0.03529

5279559

Maximum Brightness

12.5

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

16.1

mag

Diameter

1400

Taxonomic type

Rotation period (T)

3.066

Discovery Information

Discovery Date

1932-04-24

Observatory

Heidelberg-Konigstuhl

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61200.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.470715

1-sigma variation

3.087E-10

Unit

Eccentricity (e)

Value

0.560180

1-sigma variation

7.591E-9

Unit

Inclination (i)

Value

6.3522

1-sigma variation

2.275E-6

Unit

Long. of Ascending Node (Ω)

Value

35.5030

1-sigma variation

1.167E-5

Unit

Arg. of Perihelion (ω)

Value

286.0977

1-sigma variation

1.218E-5

Unit

Mean Anomaly (M)

Value

224.36160

1-sigma variation

2.120E-6

Unit

Perihelion distance

Value

0.646850

1-sigma variation

Unit

Aphelion distance

Value

2.294580

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.120642

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.189278

1-sigma variation

Unit

MOID

Value

0.026318

1-sigma variation

Unit

Orbit Period

Value

651.4653

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

A₂

Value

-3.76397

1-sigma variation

0.28304

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	9.52838E-20	-5.96207E-19	-1.40348E-16	-3.07058E-15	3.21079E-15	-5.49697E-16	4.36791E-11
e	-5.96207E-19	5.76179E-17	-9.46251E-16	2.13647E-14	-3.29230E-14	8.48691E-15	1.19156E-9
i	-1.40348E-16	-9.46251E-16	5.17500E-12	6.90021E-12	-6.38597E-12	-7.77020E-13	1.29592E-7
Ω	-3.07058E-15	2.13647E-14	6.90021E-12	1.36118E-10	-1.41094E-10	2.09684E-11	-8.05048E-7
ω	3.21079E-15	-3.29230E-14	-6.38597E-12	-1.41094E-10	1.48472E-10	-2.29311E-11	5.94575E-7
M	-5.49697E-16	8.48691E-15	-7.77020E-13	2.09684E-11	-2.29311E-11	4.49338E-12	-1.32000E-7
A₂	4.36791E-11	1.19156E-9	1.29592E-7	-8.05048E-7	5.94575E-7	-1.32000E-7	8.01126E-2

Date of computation: 2026-04-01 13:00 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

3.066

3.065

Unit

Source

[1]

[6]

Quality

Value

4,B,R

Unit

Source

[6]

Amplitude

Value

0.15-0.6

0.61

Unit

mag

Source

[6]

[1]

Rotation Direction

Value

RETRO

Unit

Source

[-]

[2]

Spinvector L

Value

Unit

Source

[1]

Spinvector B

Value

Unit

Source

[1]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[3]

[1]

Taxonomy (all)

Value

Unit

Source

[4]

[5]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

16.103

16.384

Unit

mag

Source

[7]

[8]

Slope Parameter (G)

Value

0.09**

Unit

Source

[7]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.26

Unit

Source

[10]

Diameter

Value

1400

Unit

Source

[9]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.3041
-0.129
1.0E-4
0.1742
0.43
0.1741
0.79
0.13

Unit

g-i

i-z

r-z

g-z

U-B

g-r

B-V

r-i

Source

[1]

[11]

[1]

[11]

[1]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Visual S

Unit

Source

[12]

[13]

Download this part as:

Sources

No.	Name	Additional
[1]	EARN	1.) A. V. Sergeyev, B. Carry et al A&A, 658 (2022) A109
[2]	EARN	1.) Durech, J. et al. (2008) Astron. Astrophys. 488, 345-350. (New photometric observations of asteroids (1862) Apollo and (25143) Itokawa - an analysis of YORP effect) 2.) Kaasalainen, M. et al. (2007) Nature 446, 420-422. (Acceleration of the rotation of asteroid 1862 Apollo by radiation torques) 3.) Harris, A.W. et al. (1987) Icarus 70, 246-256. (Photoelectric lightcurves of the asteroid 1862 Apollo)
[3]	EARN	1.) 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)
[4]	EARN	1.) Hartmann, W.K. et al. (1987) Icarus 69, 33-50. (The relationship of active comets, 'extinct' comets, and dark asteroids) 2.) Bus, S.J. & Binzel, R.P. (2002) Icarus 158,106-145. (Phase II of the Small Main-Belt Asteroid Spectrographic Survey: A Feature-Based Taxonomy.) 3.) Binzel, R.P. et al. (2004) Icarus 170, 259-294. (Observed spectral properties of near-Earth objects: results for population distribution, source regions, and space weathering processes.) 4.) 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)
[5]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[6]	EARN	1.) Hahn, G. (1983) in: Asteroids, comets, meteors; Uppsala Univ. Sweden pp. 35-44. (UBVRI and JHK photometry of the near-earth asteroid 1862 Apollo) 2.) Harris, A.W. et al. (1987) Icarus 70, 246-256. (Photoelectric lightcurves of the asteroid 1862 Apollo) 3.) De Angelis, G. (1995) Planet. Space Sci. 43, 649-682. (Asteroid spin, pole and shape determinations) (..,1566, 1686,1862,..) 4.) Harris, A.W. (DLR) (1998) Icarus 131, 291-301. (A Thermal Model for Near-Earth Asteroids) 5.) Petr Pravec's Ondrejov NEO Photometric Program Webpage "Prepublished Periods" 6.) Kaasalainen, M. et al. (2007) Nature 446, 420-422. (Acceleration of the rotation of asteroid 1862 Apollo by radiation torques) 7.) Krugly, Yu. N. et al. (2006) IAU Symp. 236, 385-390. (Kharkiv study of near-Earth asteroids) (1036,1627,1685, 1862,1980,3103,3200,4179,6611,8567,11405,13553,23187,54509, 66251,100085,1999LF6,2004XP14,2005AB,2006CV69,2006BQ6) 8.) Higgins D. (2008) MPB 35, 30-32. (ASTERIOD LIGHTCURVE ANALYSIS AT HUNTERS HILL OBSERVATORY AND COLLABORATING STATIONS: APRIL 2007 - JUNE 2007) (..,1685,1862,..) 9.) Polishook, D. (2012) MPB 39, 187-192. (LIGHTCURVES AND SPIN PERIODS OF NEAR-EARTH ASTEROIDS, THE WISE OBSERVATORY, 2005 - 2010) (1862,3361,5143,10115,40267,66251,68216,86829, 105140,138893,141432,141495,152931,185851,2009UN3) 10.) Warner, B.D. (2014) MPB 41, 213-224. (NEAR-EARTH ASTEROID LIGHTCURVE ANALYSIS AT CS3-PALMER DIVIDE STATION: 2014 MARCH-JUNE) (38 NEA lightcurve data) 11.) Torppa, J. et al. (2008) Icarus 198, 91-107. (Asteroid shape and spin statistics from convex models) (1036,1580, 1627,1862,1980,2100,3908,5587,6053)
[7]	ESA Aegis	ESA orbit determination and impact monitoring system
[8]	EARN	1.) Pravec, P. et al. (2012) Icarus 221, 365-387 (Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations) 2.) Harris, A.W. et al. (1987) Icarus 70, 246-256. (Photoelectric lightcurves of the asteroid 1862 Apollo)
[9]	EARN	1.) Harris, A.W. (DLR) & J.S.V Lagerros (2002) in "Asteroids III" (Eds. W.F.Bottke et al.), Univ.Ariz.Press, Tucson, USA, pp. 205-218. (Asteroids in the thermal infrared) 2.) Harris, A.W. (DLR) (1998) Icarus 131, 291-301. (A Thermal Model for Near-Earth Asteroids) 3.) Goldstein, R.M. (1981) Icarus 48, 59-61. (Radar observations of Apollo) 4.) Delbo, M. et al. (2011) Icarus 212, 138-148. (The cool surfaces of binary near-Earth asteroids) (5381,153591, 164121) 5.) Nugent, C.R. et al. (2015) Astrophys. J. 814_117 (13pp) (NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos)(201 NEOs)
[10]	EARN	1.) Harris, A.W. (DLR) (1998) Icarus 131, 291-301. (A Thermal Model for Near-Earth Asteroids) 2.) Harris, A.W. (DLR) & J.S.V Lagerros (2002) in "Asteroids III" (Eds. W.F.Bottke et al.), Univ.Ariz.Press, Tucson, USA, pp. 205-218. (Asteroids in the thermal infrared) 3.) Lebofsky, L.A. et al. (1981) Icarus 48, 335-338. (The albedo and diameter of 1862 Apollo) 4.) Delbo, M. et al. (2011) Icarus 212, 138-148. (The cool surfaces of binary near-Earth asteroids) (5381,153591, 164121) 5.) Nugent, C.R. et al. (2015) Astrophys. J. 814_117 (13pp) (NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos)(201 NEOs)
[11]	EARN	1.) Hahn, G. (1983) in: Asteroids, comets, meteors; Uppsala Univ. Sweden pp. 35-44. (UBVRI and JHK photometry of the near-earth asteroid 1862 Apollo)
[12]	EARN	1.) Goldstein, R.M. (1981) Icarus 48, 59-61. (Radar observations of Apollo) 2.) Ostro, S.J. et al. (1991) Astron. J. 102, 1490-1502. (Asteroid radar astrometry) 3.) Ostro, S.J. et al. (2002) Icarus 156, 580-583. (Radar Observations of Asteroid 1862 Apollo) 4.) Ostro, S.J. et al. (2005) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/08600/08627.html"> 8627. (1862 Apollo) (Radar observations, binary detection)
[13]	EARN	1.) Binzel, R.P. et al. (2004) Icarus 170, 259-294. (Observed spectral properties of near-Earth objects: results for population distribution, source regions, and space weathering processes.) 2.) Fevig. R.A. and U. Fink (2007) Icarus 188, 175-188. (Spectral observations of 19 weathered and 23 fresh NEAs and their correlations with orbital parameters)(433,1036, 1627,1685,1862,1866,1943,1980,3103,3122,3199,3671,4183,4341, 4954,5587,5751,5836,6037,7358,7482,7753,7822,7977,8201, 10563,11066,13651,13651,19356,20236,20255,35107,85490, J97GD32,J97UH9,J97US9,J98HE3,J98HT31,J98ME3,J98MS2,K04LC2) 3.) Binzel, R.P. et al. (2006) LPSC 37, 1491. (The MIT-Hawaii-IRTF joint campaign for NEO spectral reconnaissance.) 4.) Binzel, R.P. et al. href="http://smass.mit.edu/minus.html"> Webpage 5.) deLeon, J. et al. (2010) Astron. Astrophys 517, A23. (Observations, compositional, and physical characterization of near-Earth and Mars-crosser asteroids from a spectroscopic survey) 6.) Sanchez, J.A. et al. (2012) Icarus 220, 36-50. (Phase reddening on near-Earth asteroids: Implications for mineralogical analysis, space weathering and taxonomic classification) (1036,1620,1627,1862,1980,4179,4954,6239, 11398,25143,35107,66146)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

34796

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.47163

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1930-12-13.19236

Unit

Source

[2]

Last Observation

Value

2026-03-20.197235

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

3431 (28)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

1980-11-13

Unit

Source

[3]

Last Observation

Value

2005-11-13

Unit

Source

[3]

Delay (Discarded)

Value

8 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

9 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

17 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Note: Ephemerides requests are limited to a maximum of 1000 points and a final date not exceeding 2040/12/31 00:00.

Close Approaches for 1862 Apollo from 1950 to 2126

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
VENUS	1950-06-26 15:50	< 1 s	0.0099470	0.0099470	0.0000000
EARTH	1964-10-26 03:50	< 1 s	0.1854304	0.1854303	0.0000000
EARTH	1966-05-02 02:58	< 1 s	0.1863196	0.1863194	0.0000001
EARTH	1980-11-13 17:14	< 1 s	0.0554814	0.0554813	0.0000000
EARTH	1982-05-14 17:13	< 1 s	0.0586981	0.0586980	0.0000000
EARTH	2005-11-06 19:14	< 1 s	0.0752460	0.0752460	0.0000000
EARTH	2007-05-08 15:17	< 1 s	0.0714217	0.0714216	0.0000000
EARTH	2046-11-13 04:48	< 1 s	0.0352917	0.0352914	0.0000001
EARTH	2048-05-13 23:56	< 1 s	0.0497604	0.0497601	0.0000001
EARTH	2071-11-17 19:33	< 1 s	0.1066154	0.1066150	0.0000001
EARTH	2073-05-20 12:47	< 1 s	0.1319296	0.1319292	0.0000001
VENUS	2075-05-17 22:46	< 1 min	0.0083047	0.0083043	0.0000001
EARTH	2080-11-05 09:14	< 1 min	0.0979233	0.0979162	0.0000024
EARTH	2082-05-12 11:03	< 1 min	0.0333067	0.0333047	0.0000007
EARTH	2091-05-06 06:37	< 1 min	0.1355275	0.1354893	0.0000127

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
53.89431541	305.41258366	0.02631825	MINIMUM
303.58031900	125.75014489	0.03045644	MINIMUM
358.08418576	214.51242320	0.37695962	SADDLE
179.43421867	36.73765542	1.31755324	SADDLE
358.59803403	35.48260671	1.63131197	SADDLE
179.70925187	216.87694090	3.30401669	MAXIMUM

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MOID Plots

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