From pluto at projectpluto.com Wed Apr 1 12:46:10 2020 From: pluto at projectpluto.com (Bill Gray) Date: Wed, 1 Apr 2020 12:46:10 -0400 Subject: [neo_followup] NEO not on NEOCP in need of follow-up Message-ID: Hello all, I've just received some astrometry (sample shown below) from Vladimir Agapov, taken from Blagoveschensk in eastern Russia by A. Lapshin. It's for an H=27 object that passed us yesterday at 77920 +/- 6 km. Fortunately, they got a 4.3-hour arc for it, and we know where it is within an arcsecond or so. As I write this, it's down around mag 20.4 and dropping about a tenth of a magnitude an hour. At dec=+69 and an 80-degree elongation, it's a Northern Hemisphere show only. This station has observed artsats before, and we've confidence that timing is good (which would _really_ be a problem, otherwise, for an object that's moving this fast). It would be good to make this an officially discovered NEO. Blagoveschenk doesn't have an MPC code, which is why the observations have the (XXX) code. Having it on NEOCP wouldn't help all that much anyway; that service doesn't include earth/moon perturbations. However, if you put the text of this message, astrometry and all, into Find_Orb (on-line or installed software), that program will interpret the "COM Long." line to figure out where Blagoveschenk is, and you'll get good ephemerides and should be able to follow this up. Then perhaps we can persuade MPC to assign Blagoveschenk an MPC code after the fact, and give them an NEO discovery credit. Thanks! -- Bill COD XXX COM Long. 127 43 20.40 E, Lat. 50 07 35.68 N, Alt. 146m, GPS CON A.Lapshin CON [lapshin at ancprotek.ru] OBS A.Lapshin NET Tycho-2 ACK 2009180001 TEL 0.65-m + CCD A00001 C2020 03 31.66007510 37 21.74 -06 30 24.0 11.7 XXX A00001 C2020 03 31.68640311 07 09.85 +20 46 07.8 11.2 XXX A00001 C2020 03 31.75193312 59 12.48 +64 23 48.9 13.8 XXX A00001 C2020 03 31.76001213 16 30.14 +66 37 10.0 14.1 XXX A00001 C2020 03 31.76670113 31 06.82 +68 08 45.3 13.8 XXX A00001 C2020 03 31.77446813 48 14.58 +69 36 57.6 14.3 XXX A00001 C2020 03 31.78140014 03 32.00 +70 41 39.4 14.2 XXX A00001 C2020 03 31.78913214 20 24.58 +71 40 36.4 14.3 XXX A00001 C2020 03 31.79596114 35 01.36 +72 22 51.1 14.5 XXX A00001 C2020 03 31.80295114 49 34.93 +72 58 01.4 15.9 XXX A00001 C2020 03 31.81003515 03 48.55 +73 26 35.3 14.3 XXX A00001 C2020 03 31.81687515 16 58.98 +73 48 28.7 15.2 XXX A00001 C2020 03 31.81702515 17 16.03 +73 48 54.3 15.1 XXX A00001 C2020 03 31.82596115 33 32.25 +74 10 23.0 15.3 XXX A00001 C2020 03 31.83350115 46 24.57 +74 23 28.3 14.8 XXX A00001 C2020 03 31.84112815 58 37.23 +74 32 54.0 15.3 XXX From pluto at projectpluto.com Wed Apr 1 13:57:01 2020 From: pluto at projectpluto.com (Bill Gray) Date: Wed, 1 Apr 2020 13:57:01 -0400 Subject: [neo_followup] NEO not on NEOCP in need of follow-up In-Reply-To: References: Message-ID: <996a345f-f425-69ce-88d6-3a9c5cb903a1@projectpluto.com> I've heard from one gent who can't get those observations to work. Both on-line and Windows Find_Orb are telling him there aren't any observations in all that text. I strongly suspect e-mail client mangling. That happens sufficiently often that Find_Orb will attempt to "fix" lines that are almost, but not quite, recognizably MPC observations. But some mangling is too much for it. I've put the data in question here : https://www.projectpluto.com/temp/a00001.txt Download that and cut/paste _that_ into Find_Orb, online or installed, and it ought to work Just Fine. -- Bill On 4/1/20 12:46 PM, Bill Gray wrote: > Hello all, > > ?? I've just received some astrometry (sample shown > below) from Vladimir Agapov,? taken from Blagoveschensk > in eastern Russia by A. Lapshin.? It's for an H=27 > object that passed us yesterday at 77920 +/- 6 km. From tony at gravitysimulator.com Wed Apr 1 14:29:26 2020 From: tony at gravitysimulator.com (Tony Dunn) Date: Wed, 1 Apr 2020 11:29:26 -0700 Subject: [neo_followup] {MPML} NEO not on NEOCP in need of follow-up In-Reply-To: References: Message-ID: Here's a modified version of the Orbit Simulator link generated by FindOrb, showing A00001 approaching Earth from below. http://orbitsimulator.com/gravitySimulatorCloud/simulations/1585765355620_A00001.html On Wed, Apr 1, 2020 at 9:47 AM Bill J. Gray wrote: > Hello all, > > I've just received some astrometry (sample shown > below) from Vladimir Agapov, taken from Blagoveschensk > in eastern Russia by A. Lapshin. It's for an H=27 > object that passed us yesterday at 77920 +/- 6 km. > > Fortunately, they got a 4.3-hour arc for it, and we > know where it is within an arcsecond or so. As I write > this, it's down around mag 20.4 and dropping about a > tenth of a magnitude an hour. At dec=+69 and an 80-degree > elongation, it's a Northern Hemisphere show only. > This station has observed artsats before, and we've > confidence that timing is good (which would _really_ > be a problem, otherwise, for an object that's moving > this fast). > > It would be good to make this an officially discovered > NEO. Blagoveschenk doesn't have an MPC code, which is > why the observations have the (XXX) code. Having it on > NEOCP wouldn't help all that much anyway; that service > doesn't include earth/moon perturbations. > > However, if you put the text of this message, astrometry > and all, into Find_Orb (on-line or installed software), > that program will interpret the "COM Long." line to figure > out where Blagoveschenk is, and you'll get good ephemerides > and should be able to follow this up. Then perhaps we can > persuade MPC to assign Blagoveschenk an MPC code after > the fact, and give them an NEO discovery credit. > > Thanks! -- Bill > > COD XXX > COM Long. 127 43 20.40 E, Lat. 50 07 35.68 N, Alt. 146m, GPS > CON A.Lapshin > CON [lapshin at ancprotek.ru] > OBS A.Lapshin > NET Tycho-2 > ACK 2009180001 > TEL 0.65-m + CCD > A00001 C2020 03 31.66007510 37 21.74 -06 30 24.0 11.7 > XXX > A00001 C2020 03 31.68640311 07 09.85 +20 46 07.8 11.2 > XXX > A00001 C2020 03 31.75193312 59 12.48 +64 23 48.9 13.8 > XXX > A00001 C2020 03 31.76001213 16 30.14 +66 37 10.0 14.1 > XXX > A00001 C2020 03 31.76670113 31 06.82 +68 08 45.3 13.8 > XXX > A00001 C2020 03 31.77446813 48 14.58 +69 36 57.6 14.3 > XXX > A00001 C2020 03 31.78140014 03 32.00 +70 41 39.4 14.2 > XXX > A00001 C2020 03 31.78913214 20 24.58 +71 40 36.4 14.3 > XXX > A00001 C2020 03 31.79596114 35 01.36 +72 22 51.1 14.5 > XXX > A00001 C2020 03 31.80295114 49 34.93 +72 58 01.4 15.9 > XXX > A00001 C2020 03 31.81003515 03 48.55 +73 26 35.3 14.3 > XXX > A00001 C2020 03 31.81687515 16 58.98 +73 48 28.7 15.2 > XXX > A00001 C2020 03 31.81702515 17 16.03 +73 48 54.3 15.1 > XXX > A00001 C2020 03 31.82596115 33 32.25 +74 10 23.0 15.3 > XXX > A00001 C2020 03 31.83350115 46 24.57 +74 23 28.3 14.8 > XXX > A00001 C2020 03 31.84112815 58 37.23 +74 32 54.0 15.3 > XXX > > -=-=-=-=-=-=-=-=-=-=-=- > Groups.io Links: You receive all messages sent to this group. > > View/Reply Online (#35445): https://groups.io/g/mpml/message/35445 > Mute This Topic: https://groups.io/mt/72705336/2399803 > -=-=- > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Posts to this list or information found within may be freely used, with > the stipulation that MPML and the originating author are cited as the > source of the information. > -=-=- > Group Owner: mpml+owner at groups.io > Unsubscribe: https://groups.io/g/mpml/unsub [tony at gravitysimulator.com] > -=-=-=-=-=-=-=-=-=-=-=- > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From pluto at projectpluto.com Mon Apr 20 11:37:33 2020 From: pluto at projectpluto.com (Bill Gray) Date: Mon, 20 Apr 2020 11:37:33 -0400 Subject: [neo_followup] 2020 GA3 observations Message-ID: Hello all, This isn't a particularly interesting NEO in and of itself, but there have been some questions about the orbits that have been determined for it. It's currently around mag 20, but headed to low elongations/low brightness over the next day or so. Its current ephemeris uncertainty is a few arcseconds, enough that another track on it would resolve any lingering questions about the orbit determination. I expect it'll get observed anyway, but wanted to make sure it didn't slip back into the darkness without some final data. Thanks! -- Bill From planetaryscience at yahoo.com Tue Apr 21 19:56:31 2020 From: planetaryscience at yahoo.com (Sam Deen) Date: Tue, 21 Apr 2020 23:56:31 +0000 (UTC) Subject: [neo_followup] C2KUHZ2 another low-perihelion asteroid on a familiar orbit (virtually identical orbit to 2020 HE) References: <1032350620.648784.1587513391847.ref@mail.yahoo.com> Message-ID: <1032350620.648784.1587513391847@mail.yahoo.com> Hi all, There's been an absolute deluge of low-perihelion asteroids discovered over the last week or so. The newest one, and probably the most challenging one to follow up, is C2KUHZ2. The asteroid's nominal perihelion distance is 0.099 +/- 0.025 AU, and it has a longitude of perihelion of roughly 61.6 +/- <4.1, roughly coinciding with 2020 HE and 2019 JZ6 (the linkage I pointed out a few days ago). In fact, the node and arg_peri are virtually identical to 2020 HE! Currently it's magnitude 21.6 and quickly fading. Observations would be very much appreciated to determine its exact semimajor axis, which is currently very poorly constrained to just ~3 +/- 1 AU. (ranges are approximated 1 sigma) ???????????? 2020 HE????? C2KUHZ2q????????? 0.146??????????? 0.074-0.124 (0.099) e????????? 0.942??????????? 0.947-0.987 (0.967) i??????????? 20.54?????????? 11.3-17.7 (14.5) peri????? 216.285?????? 211.6-218.6 (215.1) node??? 206.763?????? 206.0-207.2 (206.6) long???? 63.048 ?????? ? 57.5-65.7 (61.6) ~Sam -------------- next part -------------- An HTML attachment was scrubbed... URL: From mtnsuzuki at nifty.com Tue Apr 28 11:15:18 2020 From: mtnsuzuki at nifty.com (Masayuki Suzuki) Date: Wed, 29 Apr 2020 00:15:18 +0900 Subject: [neo_followup] 2020 HS7 Message-ID: 2020 HS7 (MPEC 2020-H212) Close approach at 2020 04 28 18:50:50UT. Distance = 42747 km from geocenter. H=29.2 permID |provID |trkSub |mode|stn |obsTime |ra |dec |rmsRA|rmsDec|astCat |mag |rmsMag|band|photCat |photAp|logSNR|seeing|exp |rmsFit|nStars|notes|remarks |2020 HS7 | | CCD|Q62 |2020-04-28T11:46:44Z |205.87172 | +0.00001 |0.21 |0.23 | Gaia2|16.7 |0.21 | G| Gaia2|10.7 |1.03 |2.6 | 40|0.16 | 197|K | |2020 HS7 | | CCD|Q62 |2020-04-28T11:48:41Z |205.83669 | -0.00338 |0.27 |0.29 | Gaia2|17.2 |0.23 | G| Gaia2|10.7 |0.85 |2.5 | 40|0.16 | 195|K | |2020 HS7 | | CCD|Q62 |2020-04-28T11:50:38Z |205.80145 | -0.00690 |0.26 |0.28 | Gaia2|17.0 |0.18 | G| Gaia2|10.7 |1.05 |2.7 | 40|0.16 | 192|K | |2020 HS7 | | CCD|Q62 |2020-04-28T11:52:34Z |205.76580 | -0.01031 |0.21 |0.24 | Gaia2|17.3 |0.21 | G| Gaia2|10.7 |0.85 |2.6 | 40|0.16 | 192|K | Masayuki Suzuki