Asteroids

152560 1991BN help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.869

Aphelion (Q)

2.018

Eccentricity (e)

0.398

Inclination (i)

3.4

deg

Orbit period (P)

633.5

Earth MOID

0.02058

U parameter

0.0

Next Earth close approach

Date

2028-11-19

Nominal distance (from Earth center)

0.15359

22977192

Maximum Brightness

17.9

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.2

mag

Diameter

200

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

1991-01-19

Observatory

Steward Observatory, Kitt Peak-Spacewatch

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

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.443506

1-sigma variation

1.955E-9

Unit

Eccentricity (e)

Value

0.398012

1-sigma variation

2.341E-8

Unit

Inclination (i)

Value

3.4451

1-sigma variation

3.231E-6

Unit

Long. of Ascending Node (Ω)

Value

268.8021

1-sigma variation

3.988E-5

Unit

Arg. of Perihelion (ω)

Value

80.9895

1-sigma variation

3.962E-5

Unit

Mean Anomaly (M)

Value

123.80649

1-sigma variation

0.00001

Unit

Perihelion distance

Value

0.868974

1-sigma variation

Unit

Aphelion distance

Value

2.018037

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

0.125426

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.312154

1-sigma variation

Unit

MOID

Value

0.020580

1-sigma variation

Unit

Orbit Period

Value

633.4701

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.82091E-18	-3.41027E-17	-8.81281E-17	3.78890E-15	4.27687E-15	-1.92762E-14
e	-3.41027E-17	5.48003E-16	9.03380E-15	1.19340E-13	-2.20811E-13	1.61855E-13
i	-8.81281E-17	9.03380E-15	1.04420E-11	-6.64300E-11	6.71426E-11	-9.40846E-13
Ω	3.78890E-15	1.19340E-13	-6.64300E-11	1.59006E-9	-1.56472E-9	-3.28384E-11
ω	4.27687E-15	-2.20811E-13	6.71426E-11	-1.56472E-9	1.57001E-9	-1.39141E-11
M	-1.92762E-14	1.61855E-13	-9.40846E-13	-3.28384E-11	-1.39141E-11	1.04210E-10

Date of computation: 2025-09-10 00:30 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

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[1]

[2]

Taxonomy (all)

Value

Q,S-

Unit

Source

[3]

[4]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

19.225

Unit

mag

Source

[5]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.38

Unit

Source

[6]

Diameter

Value

200

Unit

Source

[6]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Visual S

Unit

Source

[7]

[8]

Download this part as:

Sources

No.	Name	Additional
[1]	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]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[3]	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.) Lazzarin, M., Marchi,S. & Magrin, S. (2010) href="http://www.astro.unipd.it/planets/sineo/data.html"> SINEO Database (Spectroscopic Investiation of Near-Earth Objects)
[4]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	EARN	1.) Trilling, D.E.; Mommert, M.; Hora, J.; Chesley, S.; et al. (2016) Astron. J. 152, A172.
[7]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage
[8]	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.) Lazzarin, M., Marchi,S. & Magrin, S. (2010) href="http://www.astro.unipd.it/planets/sineo/data.html"> SINEO Database (Spectroscopic Investiation of Near-Earth Objects) 3.) 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)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

12099

Unit

Source

[1]

Unobserved

Value

612

Unit

Source

[1]

Normalized RMS of residuals

Value

0.513578

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1991-01-19.24859

Unit

Source

[2]

Last Observation

Value

2024-03-05.135402

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

513 (3)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2002-11-21

Unit

Source

[3]

Last Observation

Value

2002-11-23

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

2 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

3 (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

Close Approaches for 152560 1991BN from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1957-09-21 13:43	< 1 min	0.1446111	0.1446110	0.0000000
EARTH	1964-06-29 05:31	< 1 min	0.1325015	0.1325006	0.0000003
EARTH	1976-11-16 18:40	< 1 min	0.1144053	0.1144045	0.0000003
EARTH	1983-08-21 12:43	< 1 min	0.1371984	0.1371981	0.0000001
EARTH	2002-11-13 08:03	< 1 s	0.0633329	0.0633328	0.0000000
EARTH	2009-08-17 01:18	< 1 min	0.1323644	0.1323642	0.0000001
EARTH	2028-11-19 20:14	< 1 min	0.1535930	0.1535921	0.0000003
EARTH	2035-09-17 03:46	< 1 min	0.1471857	0.1471855	0.0000001
EARTH	2042-07-03 17:36	< 1 min	0.0874612	0.0874604	0.0000003
EARTH	2061-10-05 06:20	< 1 min	0.1311541	0.1311539	0.0000001
EARTH	2068-07-06 13:25	< 1 min	0.0489417	0.0489412	0.0000002
EARTH	2080-11-22 00:05	< 1 s	0.1792488	0.1792484	0.0000001
EARTH	2087-09-03 06:13	< 1 min	0.1473296	0.1473294	0.0000000
EARTH	2106-11-11 08:00	< 1 min	0.0395468	0.0395467	0.0000000
EARTH	2113-07-24 08:55	< 1 min	0.0754397	0.0754375	0.0000007

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
317.50189801	186.33133152	0.02088250	MINIMUM
38.84805241	304.87283217	0.04077037	MINIMUM
358.35621540	246.01988528	0.14792222	SADDLE
179.10536968	66.52513492	1.02769806	SADDLE
357.81202007	65.16948248	1.86161251	SADDLE
178.98554317	246.44106231	3.02281789	MAXIMUM

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MOID Plots

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