Asteroids

2061 Anza help

Last update: 2025-11-18 13:31 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Amor

Perihelion (q)

1.052

Aphelion (Q)

3.479

Eccentricity (e)

0.536

Inclination (i)

3.8

deg

Orbit period (P)

1245.3

Earth MOID

0.05576

U parameter

0.0

Next Earth close approach

Date

2035-09-27

Nominal distance (from Earth center)

0.05369

8031230

Maximum Brightness

11.7

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

16.6

mag

Diameter

1700

Taxonomic type

Rotation period (T)

6.712

Discovery Information

Discovery Date

1960-10-22

Observatory

Lowell Observatory, Flagstaff

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

2.265257

1-sigma variation

1.730E-9

Unit

Eccentricity (e)

Value

0.535600

1-sigma variation

2.070E-8

Unit

Inclination (i)

Value

3.8005

1-sigma variation

2.657E-6

Unit

Long. of Ascending Node (Ω)

Value

207.3503

1-sigma variation

4.672E-5

Unit

Arg. of Perihelion (ω)

Value

157.1064

1-sigma variation

4.679E-5

Unit

Mean Anomaly (M)

Value

38.88742

1-sigma variation

1.545E-6

Unit

Perihelion distance

Value

1.051986

1-sigma variation

Unit

Aphelion distance

Value

3.478527

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

2.182826

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.085991

1-sigma variation

Unit

MOID

Value

0.055761

1-sigma variation

Unit

Orbit Period

Value

1245.3016

1-sigma variation

Unit

U parameter

Value

0.0

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	2.99272E-18	-7.04092E-18	3.23472E-16	8.71602E-16	-3.68708E-15	-5.15773E-16
e	-7.04092E-18	4.28468E-16	-8.61806E-15	-5.61136E-14	5.53821E-14	6.62314E-15
i	3.23472E-16	-8.61806E-15	7.05831E-12	-1.85639E-11	1.89164E-11	-8.80229E-14
Ω	8.71602E-16	-5.61136E-14	-1.85639E-11	2.18268E-9	-2.17797E-9	2.60066E-12
ω	-3.68708E-15	5.53821E-14	1.89164E-11	-2.17797E-9	2.18891E-9	-6.30498E-12
M	-5.15773E-16	6.62314E-15	-8.80229E-14	2.60066E-12	-6.30498E-12	2.38718E-12

Date of computation: 2025-11-18 13:31 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

6.712

Unit

Source

[6]

Quality

Value

Unit

Source

[6]

Amplitude

Value

0.08-0.26

Unit

mag

Source

[6]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

C/U

Unit

Source

[1]

[2]

[3]

Taxonomy (all)

Value

T/C/G,C/U

Unit

Source

[4]

[5]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

16.623

Unit

mag

Source

[7]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[7]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

medium

Unit

Source

[8]

Diameter

Value

1700

Unit

Source

[8]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.3459
0.1234
0.5454
0.76
0.35
0.4313
-0.114
0.0093

Unit

g-r

r-i

g-i

B-V

U-B

g-z

i-z

r-z

Source

[2]

[9]

[2]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[10]

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Sources

No.	Name	Additional
[1]	EARN	1.) Bowell, E. et al. (1978) Icarus 35, 313-335. (Taxonomy of asteroids)
[2]	EARN	1.) A. V. Sergeyev, B. Carry et al A&A, 658 (2022) A109
[3]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[4]	EARN	1.) Tholen, D.J. (1989) in "Asteroids II" (Eds. R.P.Binzel et al.), Univ.Ariz.Press, Tucson, USA, pp. 1139-1150. 2.) Bowell, E. et al. (1978) Icarus 35, 313-335. (Taxonomy of asteroids)
[5]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[6]	EARN	1.) Warner, B.D. (2018) MPB 45, 366-379. (Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2018 April-June)(39 NEAs) 2.) Rakos, K.D. (1960) Lowell Obs. Bull. 5, 28-29. (Light variations of the fast moving minor planet : discovered on October 22, 1960, by H.L. Giclas) 2061 Anza
[7]	ESA Aegis	ESA orbit determination and impact monitoring system
[8]	EARN	1.) Binzel, R.P. et al. (2002) in "Asteroids III" (Eds. W.F.Bottke et al.), Univ.Ariz.Press, Tucson, USA, pp. 255-271. (Physical Properties of NEOs)
[9]	EARN	1.) Rakos, K.D. (1960) Lowell Obs. Bull. 5, 28-29. (Light variations of the fast moving minor planet : discovered on October 22, 1960, by H.L. Giclas) 2061 Anza
[10]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

23767

Unit

Source

[1]

Unobserved

Value

Unit

Source

[1]

Normalized RMS of residuals

Value

0.400151

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1960-10-22.27361

Unit

Source

[2]

Last Observation

Value

2025-11-17.191305

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

1927 (12)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[-]

Last Observation

Value

Unit

Source

[-]

Delay (Discarded)

Value

0 (0)

Unit

Source

[-]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[-]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[-]

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

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 2061 Anza 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	1960-10-07 15:14	< 1 min	0.0634092	0.0634088	0.0000001
10 Hygiea	1999-04-04 00:05	< 1 min	0.0064608	0.0064603	0.0000002
EARTH	2035-09-27 13:56	< 1 min	0.0536855	0.0536853	0.0000000
EARTH	2093-08-27 14:26	< 1 min	0.1794045	0.1794005	0.0000014
EARTH	2110-10-11 14:53	< 1 min	0.0677485	0.0677470	0.0000005

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
1.14844710	266.22278091	0.05576062	MINIMUM
358.46100174	81.33083672	2.05017426	SADDLE
179.49824682	82.63762101	2.48042463	SADDLE
179.58591516	262.68448820	4.48110203	MAXIMUM

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MOID Plots

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