Birch

03924, 1968 DC, 1968DC, 1973 FC1, 1973FC1, 1975 TG, 1975TG, 1977 CU, 1977CU, 1977 EB, 1977EB, 1978 LF, 1978LF, 1980 XH3, 1980XH3, 1984 SF5, 1984SF5, J68D00C, J73F01C, J75T00G, J77C00U, J77E00B, J78L00F, J80X03H, J84S05F

All data for this body: [vot]

MPC data
Name (number) Birch (3924)
a 2.70050
e 0.11202
i / sin(i) 6.7002 / 0.11668
q 2.39798
Q 3.00302
ω 96.0244
Node 331.5282
m 14.5522
n 0.2221
Epoch 2460800.5
nobs 4808
nopp 30
Years observed 1955-2025
rms 0.67
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.700
ep 0.095
sin(ip) 0.129
G 0.150
H 12.390
Mass
D 16.48 0.206
pV 0.083 0.0082
Value
Rotational Period 18.700
Period quality 2
Spectral Class C
Spectral Class Score 2.754
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6998 0.0951 0.1291 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
14.90 4.010 4.010 Nugent 2016AJ....152...63N NEATM
14.91 4.927 4.927 Masiero 2017AJ....154..168M NEATM
15.03 0.540 0.540 Masiero 2012ApJ...759L...8M NEATM
15.17 4.100 4.100 Masiero 2021PSJ.....2..162M NEATM
15.57 3.110 3.110 Ali-Lagoa 2018A&A...612A..85A NEATM
16.53 0.490 0.490 Usui 2011PASJ...63.1117U NEATM
16.80 1.680 1.680 Ali-Lagoa 2018A&A...612A..85A NEATM
16.81 0.256 0.256 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.065 0.0250 0.0400 Masiero 2021PSJ.....2..162M NEATM
0.078 0.0160 0.0160 Ali-Lagoa 2018A&A...612A..85A NEATM
0.080 0.0124 0.0124 Masiero 2011ApJ...741...68M NEATM
0.080 0.0600 0.0600 Nugent 2016AJ....152...63N NEATM
0.091 0.0360 0.0360 Ali-Lagoa 2018A&A...612A..85A NEATM
0.103 0.0200 0.0200 Masiero 2012ApJ...759L...8M NEATM
0.139 0.0945 0.0945 Masiero 2017AJ....154..168M NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
12.39 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
18.5 2 Synodic Behrend LCDB Lightcurve
18.6719 2 Sidereal Durech 2019A&A...631A...2D Model
18.74 2 Synodic Behrend LCDB Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C 0.459 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT