December 2020 research and news items


Edwin Rod
 

Merry Christmas everyone.

 

Please find the attached usual newsletters, I haven’t had this month’s star charts for this month, but if you’re in New Zealand you might not have had much use for them anyway! According to the Met service it’s the worst November ever recorded for Wellington and I’m sure not much better across NZ. Its raining again at the moment and around 12c outside just after the summer solstice here!

There is a range of interesting research out this month, the possible discovery of a signal around Proxima really caught my attention, and there are a range of links to news items on that one to follow up on. Andrew has again taken a good look at the Chinese lunar sample return this month.

Well lets hope 2021 is a brighter year for everyone.

To finish off the year I have attached my best image of Jupiter and Saturn

 

Cheers Edwin




Research papers

An approximation to determine the source of the WOW! Signal
https://arxiv.org/abs/2011.06090

The effect of stellar multiplicity on protoplanetary discs. A NIR survey of the Lupus star forming region
https://arxiv.org/abs/2011.12297

The First VERA Astrometry Catalog
https://arxiv.org/abs/2002.03089

Chemically tracing the water snowline in protoplanetary disks with HCO
https://arxiv.org/abs/2011.12319

New insights into ice properties and their effect on ice shell convection
https://arxiv.org/abs/2011.12502

Interstellar Objects Outnumber Solar System Objects in the Oort Cloud
https://arxiv.org/abs/2011.14900

Natural radioactive environments as sources of local disequilibrium for the emergence of life
https://arxiv.org/abs/2011.14839

Astrochemistry associated with planet formation
https://arxiv.org/abs/2012.01472

The effect of pre-impact spin on the Moon-forming collision
https://arxiv.org/abs/2007.02965

The Role of Early Giant Planet Instability in the Terrestrial Planet Formation
https://arxiv.org/abs/2012.02323

Modeling transmission windows in Titan's lower troposphere
https://arxiv.org/abs/2012.02247

A Distinct Population of Small Planets Sub-Earths
https://arxiv.org/abs/2012.02273

Gaia Early Data Release 3
https://arxiv.org/abs/2012.03380

A Statistical Estimation of the Occurrence of Extraterrestrial Intelligence in the Milky Way Galaxy
https://arxiv.org/abs/2012.07902

Bayesian analysis of Juno/JIRAM's NIR observations of Europa
https://arxiv.org/abs/2012.05240

On the Robustness of Phosphine Signatures in Venus' Clouds
https://arxiv.org/abs/2012.05844

Lava Worlds From Early Earth to Exoplanets
https://arxiv.org/abs/2012.07337

Detectability of biosignatures on LHS 1140 b
https://arxiv.org/abs/2012.11426

Magnetospheres of Terrestrial Exoplanets and Exomoons
https://arxiv.org/abs/2012.11694

Visible-wavelength Spectra of Europa's Trailing Hemisphere
https://arxiv.org/abs/2012.11737

The Fundamental Connections Between the Solar System and Exoplanetary Science
https://arxiv.org/abs/2012.11628


----------------------------------------------------------------------
Interesting News items

FORTHCOMING STAR PARTIES -


CENTRAL STAR PARTY. Thu 14th – Mon 18th January 2021. Four days/nights of tenting/bunk rooms, excellent astronomy talks and
telescope viewing! Tuki Tuki Camp site, 70 Moore Rd, Haumoana, Hawkes Bay. www.censtar.party .

STARDATE – SOUTH ISLAND. Waitangi weekend, Fri 5th -Mon 8th February 2021. Staveley. Keep an eye on https://cas.org.nz/

STARDATE. Fri 12 and Sat 13 February 2021, at Stonehenge. Phoenix Astronomical Society. Contact secretary@...


Mysterious metal monolith pops up in Christchurch
https://www.stuff.co.nz/national/123769650/aliens-or-artists-mysterious-metal-monolith-pops-up-in-christchurch-the-latest-home-to-the-global-phenomenon


Rocket plumes
http://satobs.org/seesat_ref/misc/zuma_vs_falcon9-stage2_clouds_plumes_overview.pdf

The world’s oldest story? Astronomers say global myths about ‘seven sisters’ stars may reach back 100,000 years
https://theconversation.com/the-worlds-oldest-story-astronomers-say-global-myths-about-seven-sisters-stars-may-reach-back-100-000-years-151568

Chance Played A Major Role In Keeping Earth Fit For Life
http://astrobiology.com/2020/12/chance-played-a-major-role-in-keeping-earth-fit-for-life.html


Christmas without lockdowns, despite contrary views
https://sciblogs.co.nz/lately-in-science/2020/12/24/christmas-without-lockdowns-despite-contrary-views/



A Transient at Proxima Centauri?
https://www.centauri-dreams.org/2020/12/21/a-transient-at-proxima-centauri/

A signal from Proxima? Likely intelligent, unlikely from aliens
https://www.syfy.com/syfywire/a-signal-from-proxima-likely-intelligent-unlikely-from-aliens

BLC1: A candidate signal around Proxima
https://sites.psu.edu/astrowright/2020/12/20/blc1-a-candidate-signal-around-proxima/

A Statistical Estimation of the Occurrence of Extraterrestrial Intelligence in the Milky Way Galaxy
https://arxiv.org/abs/2012.07902

Alien hunters detect mysterious radio signal from nearby star
https://www.nationalgeographic.com/science/2020/12/alien-hunters-detect-mysterious-radio-signal-from-nearby-star/





Hi,

Currently there's a mag 7-ish comet in the morning sky (Comet Erasmus). It rises just before astro twilight. It could be a reasonable astrophotography target (albeit, we're fighting trilight down here in NZ). Here's an observation from J. J. Gonzalez Suarez (Spain) -

C/2020 S3 (Erasmus):
2020 Nov. 28.25 UT: m1=6.8, Dia.=3', DC=7/,
Tail= 0.4 deg. in PA 270 deg, 25x100B.
[ Zodiacal light. Altitude: 4 deg. Sidgwick method.
Tycho-2 comparison stars. SQM: 20.3.].  

Ephemerides from GUIDE 9.1 -
Erasmus (C/2020 S3)
Date         RA            declination     r      delta   mag Elong  Speed   PA  Con
----         --            -----------     -      -----   --- ----- ------ ----- ---
29 Nov 2020  14h07m46.36s  -22 56' 21.5"  0.5472  1.0850 11.6  30.2 330.15  96.0 Hya
30 Nov 2020  14h17m15.22s  -23 09' 00.1"  0.5304  1.0949 11.5  28.9 330.23  95.1 Hya
 1 Dec 2020  14h26m45.81s  -23 19' 25.4"  0.5140  1.1058 11.4  27.7 330.23  94.1 Lib
 2 Dec 2020  14h36m17.73s  -23 27' 37.2"  0.4983  1.1174 11.3  26.5 330.19  93.1 Lib
 3 Dec 2020  14h45m50.61s  -23 33' 35.9"  0.4833  1.1299 11.2  25.2 330.12  92.2 Lib
 4 Dec 2020  14h55m24.08s  -23 37' 22.8"  0.4691  1.1431 11.2  24..0 330.05  91.2 Lib
 5 Dec 2020  15h04m57.81s  -23 38' 59.6"  0.4558  1.1570 11.1  22.8 329.96  90..3 Lib
 6 Dec 2020  15h14m31.48s  -23 38' 29.0"  0.4436  1.1715 11.0  21.6 329.85  89.4 Lib
 7 Dec 2020  15h24m04.72s  -23 35' 53.9"  0.4326  1.1866 11.0  20.4 329.70  88.5 Lib
 8 Dec 2020  15h33m37.15s  -23 31' 18.3"  0.4230  1.2022 10.9  19.2 329.46  87.6 Lib
 9 Dec 2020  15h43m08.30s  -23 24' 46.5"  0.4148  1.2182 10.9  18.0 329.07  86.8 Lib
10 Dec 2020  15h52m37.63s  -23 16' 23.5"  0.4081  1.2345 10.8  16.8 328.47  86.0 Sco
11 Dec 2020  16h02m04.51s  -23 06' 15.0"  0.4032  1.2510 10.8  15.7 327.58  85.2 Sco
12 Dec 2020  16h11m28.21s  -22 54' 27.1"  0.4000  1.2677 10.8  14.5 326.34  84.5 Sco
13 Dec 2020  16h20m47.89s  -22 41' 06..5"  0.3987  1.2844 10.8  13.4 324.67  83.8 Sco (perihelion)
14 Dec 2020  16h30m02.66s  -22 26' 20.3"  0.3992  1.3011 10.9  12.3 322.52  83.1 Oph
15 Dec 2020  16h39m11.60s  -22 10' 15.7"  0.4016  1..3177 10.9  11.3 319.88  82.5 Oph
16 Dec 2020  16h48m13.77s  -21 53' 00.0"  0.4058  1.3343 11.0  10.3 316.72  81.9 Oph
17 Dec 2020  16h57m08.29s  -21 34' 40..5"  0.4117  1.3507 11.1   9.3 313.08  81.4 Oph
18 Dec 2020  17h05m54.35s  -21 15' 24.4"  0.4192  1.3670 11.2   8.4 308.98  80.8 Oph
19 Dec 2020  17h14m31.23s  -20 55' 18.4"  0.4282  1.3832 11.3   7.6 304.49  80.3 Oph
20 Dec 2020  17h22m58.34s  -20 34' 29.0"  0.4387  1.3993 11.4   6.9 299.65  79..8 Oph

Cheers
John D - RASNZ Comet and Meteor Section




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