Asteroids

399774 2005NB7 help

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

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.987

Aphelion (Q)

3.102

Eccentricity (e)

0.517

Inclination (i)

12.7

deg

Orbit period (P)

1067.8

Earth MOID

0.00806

U parameter

0.1

Next Earth close approach

Date

2046-04-15

Nominal distance (from Earth center)

0.02938

4395427

Maximum Brightness

14.1

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

18.5

mag

Diameter

500

Taxonomic type

Rotation period (T)

3.488

Discovery Information

Discovery Date

2005-07-05

Observatory

Catalina Sky Survey

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

2.044476

1-sigma variation

1.262E-8

Unit

Eccentricity (e)

Value

0.517051

1-sigma variation

1.558E-8

Unit

Inclination (i)

Value

12.6967

1-sigma variation

4.752E-6

Unit

Long. of Ascending Node (Ω)

Value

199.1353

1-sigma variation

1.048E-5

Unit

Arg. of Perihelion (ω)

Value

348.1496

1-sigma variation

1.283E-5

Unit

Mean Anomaly (M)

Value

12.50554

1-sigma variation

0.00002

Unit

Perihelion distance

Value

0.987378

1-sigma variation

Unit

Aphelion distance

Value

3.101573

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.008306

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

2.034104

1-sigma variation

Unit

MOID

Value

0.008061

1-sigma variation

Unit

Orbit Period

Value

1067.7544

1-sigma variation

Unit

U parameter

Value

0.1

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	1.59230E-16	-1.69321E-17	-1.13823E-14	1.32005E-14	4.54340E-14	-2.77966E-13
e	-1.69321E-17	2.42734E-16	5.16872E-15	3.66648E-14	-1.23461E-13	3.93802E-14
i	-1.13823E-14	5.16872E-15	2.25812E-11	1.11924E-11	-2.05399E-11	2.08497E-11
Ω	1.32005E-14	3.66648E-14	1.11924E-11	1.09736E-10	-9.83507E-11	-2.42579E-11
ω	4.54340E-14	-1.23461E-13	-2.05399E-11	-9.83507E-11	1.64639E-10	-8.57670E-11
M	-2.77966E-13	3.93802E-14	2.08497E-11	-2.42579E-11	-8.57670E-11	4.86322E-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

3.488

Unit

Source

[4]

Quality

Value

3,B,R

Unit

Source

[4]

Amplitude

Value

0.13

Unit

mag

Source

[4]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

S/Sr

Unit

Source

[1]

[2]

Taxonomy (all)

Value

S/Sr

Unit

Source

[3]

[2]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

18.547

Unit

mag

Source

[5]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[5]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[-]

Diameter

Value

500

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

Unit

Source

[7]

Satellites

Satellites

Value

Unit

Source

Satellites

Value

Binary Child 1

Unit

Source

[3]

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Sources

No.	Name	Additional
[1]	EARN	1.) Alexey V. Sergeyev and Benoit Carry A&A, 652 (2021) A59
[2]	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)
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) Shepard, M.K. et al. (2008) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/08900/08936.html"> 8936. (2005 NB_7) (Radar detection of a binary system) 2.) Kusnirak, P. et al. (2008) CBET HREF="http://www.cbat.eps.harvard.edu/iau/cbet/001300/CBET001383.txt"> 1383. (2005 NB_7) (rotation and orbital periods of binary system) 3.) Vander Haagen, G. (2008) MPB 35, 181-182. (LIGHTCURVE OF BINARY MINOR PLANET 2005 NB7) 4.) Pravec, P. et al (2016) Icarus 267,267-295. (Binary asteroid population. 3. Secondary rotations and elongations) (..,..)
[5]	ESA Aegis	ESA orbit determination and impact monitoring system
[6]	EARN	1.) Shepard, M.K. et al. (2008) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/08900/08936.html"> 8936. (2005 NB_7) (Radar detection of a binary system)
[7]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage 2.) Shepard, M.K. et al. (2008) I.A.U. Circ. HREF="http://www.cbat.eps.harvard.edu/iauc/08900/08936.html"> 8936. (2005 NB_7) (Radar detection of a binary system)

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

7916

Unit

Source

[1]

Unobserved

Value

790

Unit

Source

[1]

Normalized RMS of residuals

Value

0.30899

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2001-12-18.286616

Unit

Source

[2]

Last Observation

Value

2023-08-21.42705

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

933 (4)

Unit

Source

[1]

Radar Summary

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

Radar

Value

Unit

Source

First Observation

Value

2008-04-11

Unit

Source

[3]

Last Observation

Value

2008-04-11

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (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 399774 2005NB7 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	1970-05-04 13:21	< 1 min	0.1795968	0.1795912	0.0000019
EARTH	2008-04-17 02:45	< 1 s	0.0422204	0.0422203	0.0000000
EARTH	2046-04-15 07:14	< 1 min	0.0293816	0.0293764	0.0000017
EARTH	2093-04-30 20:28	5.3	0.1536322	0.1535198	0.0000374
EARTH	2096-03-18 14:23	7.6	0.1111449	0.1110468	0.0000327

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Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
6.96741197	96.42081491	0.00692308	MINIMUM
1.14276364	266.36294953	1.98789759	SADDLE
180.04813607	265.65893040	2.10248528	SADDLE
180.70353355	86.01981333	4.09997197	MAXIMUM

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MOID Plots

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