Ashbrook

02157, 1924 EF, 1924EF, 1952 FF1, 1952FF1, 1957 JD1, 1957JD1, 1970 ED, 1970ED, 1975 EG1, 1975EG1, J24E00F, J52F01F, J57J01D, J70E00D, J75E01G

All data for this body: [vot]

MPC data
Name (number) Ashbrook (2157)
a 2.78718
e 0.11035
i / sin(i) 8.6104 / 0.14971
q 2.47962
Q 3.09475
ω 267.1770
Node 349.1046
m 208.4378
n 0.2118
Epoch 2460800.5
nobs 5948
nopp 31
Years observed 1924-2025
rms 0.60
Best values
[raw, vot]

Value Standard error
Parent Gefion (1272)
 
ap 2.783
ep 0.129
sin(ip) 0.160
G 0.150
H 12.150
Mass
D 13.42 2.190
pV 0.170 0.0770
Value
Rotational Period 147.400
Period quality 2
Spectral Class S
Spectral Class Score 45.674
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
1272 Gefion 0 Gefion Novakovic 2019EPSC...13.1671N HCM
1272 Gefion 516 Gefion -0.0200 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7834 0.1290 0.1598 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
13.42 2.190 2.190 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.170 0.0770 0.0770 Masiero 2012ApJ...759L...8M 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
12.15 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
147.4409 2 Sidereal Martikainen 2021A&A...649A..98M Model
147.45 2 Sidereal Durech 2020A&A...643A..59D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
L Bus VIS Lazzaro 2004Icar..172..179L SPEC
S Bus-DeMeo VISNIR DeMeo 2009Icar..202..160D SPEC
S Bus VIS Bus 2002Icar..158..146B SPEC
S Tholen VIS Lazzaro 2004Icar..172..179L SPEC
S 0.529 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S 0.900000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
S 1.000000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC