Contents on 1 June '07
- Minor-Object News -- six items
- Minor-Object Science -- five papers
- IAU Minor Planet Center
- Impact Risk Monitoring -- nothing to report
WELCOME to A/CC's prototype daily news publication designed to be the viewing end of a planned autonomous 24-hour news service. The new tools and this publication format are working well enough now to share with readers. It is expected that this approach will require less time to maintain than our previous news and small asteroid pages, which were retired on May 14th. There's still more development ahead and there probably will be some glitches along the way, but this is what's needed to keep up with the increasing pace of minor-object news. The CRT page will be maintained separately for a little while longer, until all of this is working smoothly. And the CRT and small-asteroid ephemerides will be kept going.
Minor-Object News on 1 June '07
- "Teacher to Donate Meteorite to Idaho," New West Boise 31 May - Quote: "The meteorite weighs 64 pounds, is composed mostly of iron and comes from one of the most famous meteorite sites in the world ... the Campo del Cielo in Argentina."
- "Engineers descend on monster radio dish," AP at MSNBC 31 May - Quote: "[Arecibo's] budget will plummet from $10.5 million this year to $4 million by 2010 ... with the savings going to construct a telescope 20 times more powerful, perhaps in Australia or South Africa."
- Radar campaign: JPL has posted a 6R10DB9 Planning page in advance of radar observations scheduled at Goldstone in southern California on 12, 14, and 17 June. 6R10DB9 passes Earth on June 14th at 0.7 lunar distance and "will be a strong radar target." (The timing isn't good for Arecibo in Puerto Rico, which will be down for maintenance.) The planning page states that this object "is only a few meters in diameter and it is currently orbiting Earth as a temporary satellite. It is making its fourth and final revolution about Earth and will return to solar orbit later in the summer." 6R10DB9 has been suspected to be of artificial origin but is reported here as "probably a natural object [perhaps] material ejected off the Moon by an impact," because its motion is being perturbed by solar radiation in a manner inconsistent "with old flight hardware."
It is noted that "This is the closest and smallest asteroid that we have ever attempted to observe." The Goldstone schedule indicates that optical astrometry isn't needed to help prepare for this work, but physical observations (photometry) are emphatically requested.
Are you wondering where that odd object designation came from? It is the temporary discovery designation assigned by the Catalina Sky Survey, which was first to notice this object last September. For much more about 6R10DB9, see April 18th news.
- "Mud gives clear picture of ancient climate," Nunatsiaq News 1 June - Quote: "Pingualuit, formerly known as Chubb Crater, is a perfectly circular lake, 3.4 kilometres in diameter. It was formed when a meteorite slammed into the earth 1.4 million years ago." - Note: There's a nice picture here of "the crystal eye of Nunavik."
- "Dentist to explore cavities... and giant crater too," Dorset Daily Echo 1 June - Quote: "But the main reason for the 40-strong SES team going to Bolivia is to carry out a study of an eight kilometre wide crater [believed to have been formed] between 5,000 and 30,000 years ago."
- "Picture at the Gantries of Dawn," Space.com Image of the Day 1 June - Quote: "Pad 17-B is the site for the launch of the Dawn spacecraft on June 30. Dawn's mission is to explore two of the asteroid belt's most intriguing and dissimilar occupants: asteroid Vesta and the dwarf planet Ceres [providing] images of varied landscapes on previously unseen worlds, including mountains, canyons, craters, lava flows, polar caps and, possibly ancient lakebeds, streambeds and gullies."
Minor-Object Science on 1 June '07
- "Gravitational instability in binary protoplanetary disks" by Mayer, Lucio with Alan Boss & Andrew F. Nelson, abstract & PDF at arXiv.org 23 May
- "The Accelerated Kepler Problem" by Namouni, Fathi with Massimiliano Guzzo, abstract & PDF at arXiv.org 23 May - Quote: "The accelerated Kepler problem is obtained by adding a constant acceleration to the classical two-body Kepler problem. This setting models the dynamics of a jet-sustaining accretion disk and its content of forming planets as the disk loses linear momentum through the asymmetric jet-counterjet system it powers."
- "Dynamics and planet formation in/around binaries" by Marzari, Francesco with Philippe Thebault, Steven Kortenkamp & Hans Scholl, abstract & PDF at arXiv.org 23 May - Quote: "We concentrate on one crucial parameter: the distribution of encounter velocities within the planetesimal swarm."
- "Disks around Young Binary Stars" by Prato, L. with A.J. Weinberger, abstract & PDF at arXiv.org 24 May
- "Observational Characteristics of the First Protostellar Cores" by Omukai, K., abstract & PDF at arXiv.org 24 May
NEOCP Activity on 1 June '07
The Minor Planet Center's NEO discovery Confirmation Page (NEOCP) was not active on this day, and hadn't been active since 1724 UTC on 31 May.
New MPECs on 1 June '07
Minor Planet Electronic Circulars
As of last check at 2356 UTC, there were three MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2007-L01 time-stamped "06:09 UT" - Daily Orbit Update - see below
- MPEC 2007-L02 time-stamped "22:04 UT" - Comets C/2007 H6, 2007 H7, 2007 H8, 2007 H9 (SOHO) - see below
- MPEC 2007-L03 time-stamped "22:13 UT" - Comets C/2007 J1, 2007 J2, 2007 J3, 2007 J4 (SOHO)
MPEC 2007-L03 - "22:13 UT" - Comets C/2007 J1, 2007 J2, 2007 J3, 2007 J4 (SOHO)
- CK07J040 C/2007 J4 from the LASCO Coronagraph 2 on the Solar & Heliospheric Obs. (SOHO) (May 4.77-85p12)
- CK07J030 C/2007 J3 from the LASCO Coronagraph 3 on the Solar & Heliospheric Obs. (SOHO) (May 4.75-78p6 & 4.85-86p4) and SOHO C2 (May 4.98-10p16)
- CK07J020 C/2007 J2 from SOHO C2 (May 3.12-25p20)
- CK07J010 C/2007 J1 from SOHO C2 (May 2.58-00p58) and SOHO C3 (May 2.93p2, 2.97p2 & 3.07p2)
MPEC 2007-L02 - "22:04 UT" - Comets C/2007 H6, 2007 H7, 2007 H8, 2007 H9 (SOHO)
- CK07H090 C/2007 H9 from SOHO C2 (April 30.53-64p16)
- CK07H080 C/2007 H8 from SOHO C2 (April 29.98-03p10)
- CK07H070 C/2007 H7 from SOHO C2 (April 23.16-31p22)
- CK07H060 C/2007 H6 from SOHO C2 (April 21.87-93p10)
- Observations of almost-small asteroids (21.7<H<=22.0)
- K04K17H 2004 KH17 (q=0.357 AU, arc=2 opp, H=22.0 ~135m) from Powell Obs. (June 1.12-13p3)
- Observations of other objects
- K07J02Y 2007 JY2 (arc=23 days, H=21.7 ~155m) from Alter Satzberg Obs. (May 31.85-90p3)
- K06WC9E 2006 WE129 (i=39.5°, arc=186 days, H=19.7 ~389m) from Powell Obs. (June 1.11-12p3)
- K05A13D 2005 AD13 (arc=2 opp, H=17.9 ~891m) from McCarthy Obs. (May 31.11-13p3) and Celbridge Obs. (May 31.98-02p2)
- K02K04F 2002 KF4 (i=37.2°, Q=4.571 AU, arc=3 opp, H=17.2 ~1.23 km) from Celbridge Obs. (May 31.98-01p2)
- J98U01L 1998 UL1 (i=42.0°, arc=5 opp, H=16.6 ~1.62 km) from Greiner Research Obs. (June 1.16-18p9)
- D6874 136874 1998 FH74 from the Catalina Sky Survey (CSS) (May 27.38-40p4) and Celbridge Obs. (May 31.99-02p2)
- 89355 89355 2001 VS78 from CSS (May 27.44-47p4)
- 85275 85275 1994 LY from Celbridge Obs. (May 31.99-03p2)
- 68950 68950 2002 QF15 from Powell Obs. (June 1.15-16p3)
Observers on 1 June '07
Seven observing facilities appeared in this day's MPECs.
|B03||Alter Satzberg Obs. in Austria, 1 in MPEC 2007-L01 -- 2007 JY2|
|703||Catalina Sky Survey in Arizona, 2 in MPEC 2007-L01 -- 136874, 89355|
|J65||Celbridge Obs. in Ireland, 4 in MPEC 2007-L01 -- 2005 AD13, 2002 KF4, 136874, 85275|
|H51||Greiner Research Obs. in Wisconsin, 1 in MPEC 2007-L01 -- 1998 UL1|
|932||McCarthy Obs. in Connecticut, 1 in MPEC 2007-L01 -- 2005 AD13|
|649||Powell Obs. in Kansas, 3 in MPEC 2007-L01 -- 2004 KH17, 2006 WE129, 68950|
|2492||LASCO Coronagraph 2 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 8 in MPECs 2007-L02 & 2007-L03 -- C/2007 J4, C/2007 J3, C/2007 J2, C/2007 J1, C/2007 H9, C/2007 H8, C/2007 H7, C/2007 H6|
|2493||LASCO Coronagraph 3 via the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 2 in MPEC 2007-L03 -- C/2007 J3, C/2007 J1|
Chronology on 1 June '07
Times are UTC for when the items were noted by Major News.
|2242||Grabbed MPEC 2007-L02 - Comets C/2007 H6, 2007 H7, 2007 H8, 2007 H9 (SOHO) - see above|
Grabbed MPEC 2007-L03 - Comets C/2007 J1, 2007 J2, 2007 J3, 2007 J4 (SOHO) - see above
|2009||Added news report, "Radar campaign"|
Added link to news story, "Mud gives clear picture of ancient climate"
Added link to news story, "Picture at the Gantries of Dawn"
Added link to news story, "Dentist to explore cavities... and giant crater too"
|1512||Grabbed MPEC 2007-L01 - Daily Orbit Update - see above|
|0554||Added MOS paper, "Disks around Young Binary Stars" - see above|
Added MOS paper, "Dynamics and planet formation in/around binaries" - see above
Added MOS paper, "Gravitational instability in binary protoplanetary disks" - see above
Added MOS paper, "Observational Characteristics of the First Protostellar Cores" - see above
Added MOS paper, "The Accelerated Kepler Problem" - see above
Added link to news story, "Engineers descend on monster radio dish"
Added link to news story, "Teacher to Donate Meteorite to Idaho"