Planet 2I/Borisov

Name 2I/Borisov
Planet Status Confirmed
Discovered in 2019
Mass
Mass*sin(i)
Semi-Major Axis
Orbital Period
Eccentricity 3.155 (± 0.13)
ω
Tperi
Radius
Inclination
Update 2019-11-27
Detection Method Imaging
Mass Detection Method
Radius Detection Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K
Calculated temperature
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names C/2019 Q4 (Borisov)

Star

Sun
Name Sun
Distance
Spectral type
Apparent magnitude V
Mass 1.0 MSun
Age
Effective temperature
Radius 1.0 RSun
Metallicity [Fe/H]
Detected Disc
Magnetic Field
RA2000 00:00:00.0
Dec2000 +00:00:00
Alternate Names
Planetary system
2 planets

More data

Atmospheric parameters

Temperatures

Data Source Type Result Value Result Figure Notes Reference

Molecules

Molecule Data Source Type Result Value Result Figure Notes Reference
C2 Measurements Detected 2019 - KARETA Th.
CN Measurements Detected 2019 - OPITOM C.
Measurements Detected 2019 - FITZSIMMONS A.
O I Measurements Detected 2019 - McKAY A.
OH Measurements Detected 2019 - CROVISIER J.

Observability Predictor

Remarks

26 Nov 2019:
Minor Planet Electronic Circulars:
2019-V34
2019-U80
2019-T116
2019-T44
2019-S120
2019-S72
2019-S62
2019-S25
2019-S09
2019-S03
2019-R113
2019-R106
4 Nov 2019:
Marginal OH detection (Crovisier et al.)
18 Oct 2019:
Electronic Telegram 4679
16 Oct 2019:
Hubble DDT Program 16009 (D. Jewitt)
Observation by Hubble
24 Sep 2019:
IAU Press Release  
19 Sep 2019:
Spectrum at Gran Telescopio Canarias (GTC)
19 Sep 2019:
JPL
16 Sep 2019:
ESA website
13 Sep 2019:
FAQ for 2I/Borisov
13 Sep 2019:
Minimum heliocentric distance: 1.96 ± 0.04 AU on 9 Dec 2019
Minimum geocentric distance: 1.89 AU on 28 Dec 2019 (Guzik et al. 2019)

Related publications

Is Another Interstellar Visitor Headed Our Way?
2019 KING B.
Sky & Telescope
paper

Interstellar comet 2I/Borisov
2019 GUZIK P., DRAHUS M., RUSEK K., WANIAK W., CANNIZZARO G. & PIOTR-MARAZUELA I.
Nature Astronomy, in press
paper   arxiv  

Sending a Spacecraft to Interstellar Comet C/2019 Q4(Borisov)
2019 HIBBERD A., PERAKIS N. & HEIN A.
arxiv  

An Argument for a Kilometer-Scale Nucleus of C/2019 Q4
2019 SIRAJ A. & LOEB A.
Res. Notes AAS, 3, 132
paper  arxiv  

Interstellar Visitors: A Physical Characterization of Comet C/2019 Q4 (Borisov) with OSIRIS at the 10.4 m GTC
2019 de LEON J., LICANDRO J., SERRA-RICART M., CABRERA-LAVERS A., FONT SERRA J. et al.
Res. Notes AAS, 3, 131
paper  

Optical spectrum of C/2019 Q4
2019 FITZSIMMONS A., HAINAUT O., YANG B., OPITOM C., MEECH K. etal.
Central Bureau for Astronomical Telegrams, No. 4670
Full text

Kruger 60 -- a plausible home system of the interstellar comet C/2019 Q4
2019 DYBCZYNSKI P., KROLIKOWSKA M. & WYOCZANSKA R.
arxiv  

Interstellar Comet gb00234
2019 GUZIK P., DRAHUS M., RUSEK K., WANIAK W., CANNIZZARO G. & PASTOR MARAZUEALA I.
Astronomical Telegram, ATel#13100
paper  

Clues to Understanding the Microphysics of Dust in the Interstellar Comet C/2019 Q4 (Borisov)
2019 ZUBKO E., CHORNAYA E., VIDEEN G. & KIM S.
Res. Notes AAS, 3, 138
paper

Detection of CN gas in Interstellar Object 2I/Borisov
2019 FITZSIMMONS A., HAINAUT O., MEECH K., JEHIN E., MOULANE Y. et al.
ApJ. Letters, 885, L9
paper  arxiv  

Optical spectrum of 2I/Borisov
2019 YANG B., KEANE J., KELLEY M., PROTOPAPA S. & MEECH K.
Central Bureau for Astronomical Telegrams, No. 4672
Full text

Initial Characterization of Interstellar Comet 2I/2019 Q4 (Borisov)
2019 JEWITT D. & LUU J.
ApJ, submitted
arxiv  

Carbon Chain Depletion of 2I/Borisov
2019 KARETA Th., ANDREWS J., NOONAN J., HARRIS W., SMITH N. et al.
ApJ. Letters, submitted
arxiv  

Velocity of Dust Ejected from Interstellar Comet 2I/Borisov
2019 KOCHERGIN A., ZUBKO E., HUSARIK M., IVANOVA O., VIDEEN G. et al.
Res. Notes AAS, 3, 152
paper  

Capture of interstellar objects: a source of long-period comets
2019 HANDS T. & DEHNEN W.
MNRAS, submitted
arxiv  

Are 2I/Borisov and Oort Cloud Comets Alike?
2019 SEKANIA Z.
Astron. J., submitted
arxiv  

2I/Borisov: A C2 depleted interstellar comet
2019 OPITOM C., FITZSIMMONS A., JEHIN E., MOULANE Y., HAINAUT O. et al.
Astron. & Astrophys., 631, L8
paper  arxiv  

The Difficulty of Predicting Stellar Occultations by Interstellar Comet 2I/Borisov
2019 BAMBERG D. & WELLS G.
Res. Notes AAS, 3, 159
paper  

Detection of a Water Tracer in Interstellar Comet 2I/Borisov
2019 McKAY A., COCHRAN A., DELLO RUSSO N. & DISANTI M.
ApJ. Letters, submitted
arxiv  

Characterization of the Nucleus, Morphology and Activity of Interstellar comet 2I/Borisov by Optical and Near-Infrared GROWTH, Apache Point, IRTF, ZTF, Keck and HST Observations
2019 BOLIN B., LISSE C., KASLIWAI M., QUIMBY R., TAN H. et al.
ApJ. Letters, submitted
arxiv  

2I/Borisov: Marginal OH detection
2019 CROVISIER J., COLOM P., BIVER N. & BOCKELEE-MORVAN D.
IAU Electronic Telegram No. 4691
full text  

The Dynamics of Interstellar Asteroids and Comets within the Galaxy: an Assessment of Local Candidate Source Regions for 1I/`Oumuamua and 2I/Borisov
2019 HALLATT T. & WIEGERT P.
Astron. J., submitted
arxiv  

Hyperbolic Orbits in the Solar System: Interstellar Origin or Perturbed Oort Cloud Comets?
2019 HIGUCHI A. & KOKUBO E.
MNRAS, in press
paper  arxiv  

Pre-discovery Activity of New Interstellar Comet 2I/Borisov Beyond 5 AU
2019 YE Q., KELLEY M., BOLIN B., BODEWITS D., FARNOCCHIA D. et al.
Astron. J., submitted
arxiv  

Initial Characterization of Interstellar Comet 2I/2019 Q4 (Borisov)
2019 JEWITT D. & LUU J.
ApJ. Letters, 886, L29
paper