New Minor Planets
discovered by Gianluca Masi, Ceccano (FR) Italy
This page provides some details about the discoveries
occurred at this observatory. I report the Minor Planet Electronic Circulars
(MPEC) where updated orbital elements for the listed bodies have been
published, togheter with some animations. To date, the following minor
planets have been discovered: 1998 DA (10931), 1998
TL7, 1999 CN10, 1999 CL12,
1999
NC1, 1999 PK, 1999QV1,
1999
RA, 1999 RN, 1999 RS2,
1999 RL35, 1999 TN4,
1999
TZ10.
1998 DA,
On the night of Feb the 16 1998, I've discovered
a new minor planet, which received the provisonal designation 1998 DA.
It has been found while I was following some critical minor planets, which
observation is recommended by Minor
Planet Center. The measures taken over the next three days have permitted
to compute the first orbit, so that Dr. Gareth V. Williams, MPC, has been
able to link this object to a previous one, observed in 1987 (1987UO).
The current designation, however, is the last one (1998 DA). The orbital
elements have been published on the following MPEC circulars:
1) 1998-D07;
2) 1998-D08;
3) 1998-D11;
4) 1998-D14;
5) 1998-E01;
6) 1998-E06;
7) 1998-E28;
8) 1998-F07;
9) 1998-H10;
10)1999-K01;
11)1999-K32;
12)1999-L26;
13)1999-M02.
The animation presented above has been obtained by joining two frames taken
the last Feb. 18. 1998 DA is near to the center of the picture, while 3521-Comrie
(I was measuring this asteroid) is visible in the lower part, on the left.
Observations over the next years are required to number definitely the
new minor planet. Considering the info reported on the last MPEC cited
above, it is now a four oppositions object.
The instruments used where a Celestron CG-11 (280 mm, f/6.3) and a SBIG
ST-7 CCD camera. The images have been processed and analyzed with CCDSoft,
QMiPS32 and Astrometrica.
The first check has been done with TheSky,
before of the final control on the MPC web site.
1998 TL7
On Oct the 15, 1998, during my astrometric observing
sessions, I was measuring 1994 PA19. While blinking the frames, I noted
another body, that turned out to be new. Its designation now is 1998 TL7.
Because of the bad weather conditions, I've not been able to take measures
in a second night, as requested from the Minor
Planet Center to have a designation. I've sent an help request to some
friends amateur astronomers, asking to try to recover this asteroid. On
Oct. the 19, Bob Linderholm, NE (USA), took several very good CCD images
with the minor planet, obtaining astrometric positions that have permitted
to get the designation (thank you very much, Bob!). This
animation, obtained by joining two of his frames, shows the asteroid
while moving against the stars. Of course, it is necessary to get other
positions to be able to recover the object at its next oppositions. I thank
Bob and also Gordon Garradd (Australia) for their precious follow-up observations.
The orbital elements have been published on the following MPEC circulars:
1) 1998-V07;
2) 1998-V27;
3) 1998-X04;
4) 1998-X18.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft, QMiPS32
and Astrometrica.
The first check has been done with TheSky,
before of the final control on the MPC web site.
1999 CN10
On Feb. the 13, 1999, I discovered this new asteroid,
not too far from Regolus (alpha Leonis). It was clearly visible in four
frames I imaged to look for new minor planets. I got the second night observations
on Feb. the 16, obtaining the current designation from the Minor
Planet Center. This animation shows the new
object while moving against the stars; its brightness was around mag. 17.5.
Brian Marsden, Minor
Planet Center's director, has linked this object to 1997 UJ25, but
the principal designation is 1999 CN10. The relative orbital elements have
been published on the following MPECs:
1) 1999-D09;
2) 1999-D11;
3) 1999-D18;
4) 1999-E13;
5) 1999-E19;
6) 1999-E24;
7) 1999-F03;
8) 1999-F09;
9) 1999-F18;
10) 1999-F19;
11) 1999-F36;
12) 1999-H36.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft, QMiPS32
and Astrometrica.
The first check has been done with TheSky,
before of the final control on the MPC web site.
1999 CL12
I've discovered this asteroid on Feb. the 14, few
hours later 1999 CN10. It was a bit dimmer than it. The
animation underlines, as usual, its motion against the starry background
and has been obtained by joining two of the discovery frames. Orbits for
this asteroid have been published on the following MPECs:
1) 1999-D11;
2) 1999-D18;
3) 1999-E13;
4) 1999-E21;
5) 1999-F26;
6) 1999-F36;
7) 2000-Y26.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft, QMiPS32
and Astrometrica.
The first check has been done with TheSky,
before of the final control on the MPC web site.
1999 NC1
The night between July the 11 and 12, during an observing
session for hunting new minor planets, I discovered the previously unknown
asteroid 1999 NC1. It was visible against a very dense starry background
(near the galactic plane) and so it has been difficult to identify. Measuring
its positions has been a very hard work, as the body was often too close
to bright stars, especially during the second night, when it was near (less
than 5 arcmin apart) to ni1 Sagittarii, of magnitude 5.7. Positions
provided (on my request) by my friend Bob Linderholm, NE (USA) have been
very useful. It was unusually bright, around magnitude 15.5. The discovery
of such a bright asteroid is a rare event today. Furthermore, during the
summer nights the antisolar point is quite low above the horizon, so, looking
in that direction, it is difficult to find faint minor planets and there
are few chances (for the Italian latitude) to discover new ones. This
animation shows the body as in the night of the discovery; please note
the high density of stars.
Following observations have been used by G. Williams, G. Williams, Minor
Planet Center, to link the object to 1996 SM7; the second one is the
main designation.
The orbital elements have been published on the following MPEC circulars
(of course the object is reported there as 1996 SM7):
1) 1999-N23;
2) 1999-O09;
3) 2000-Y35.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft, QMiPS32
and Astrometrica.
The first check has been done with TheSky,
before of the final control on the MPC web site.
1999 PK
In the night between Aug the 5 and 6, during the
asteroid hunting program under way at this observatory, I've found an unknown
object in Acquarius. It is now known as 1999 PK. I noticed its fast proper
motion and direction of motion, quite different from the ones I observed
for main belt objects. Astrometricary and identification of this new minor
planet have been quite hard, because its brightness is under mag 18, it
is low above the horizon and moving fast towards south. Between Aug 6 and
7, I got the necessary second night positions, which are necessary to get
the designation; they were in good accordance with Vaisala's method predictions.
This animation shows the body as in the night of
the discovery.
Orbits for this asteroid have been published on the following MPECs:
1) 1999-P28;
2) 1999-P33;
3) 1999 Q09;
4) 1999 R09;
5) 1999 R12
6) 1999 R16;
7) 1999 R33;
8) 1999 S10;
9) 1999 T03;
10) 1999 U20;
11) 1999 U23;
12) 2000 Y26.
Using TheSky and the orbital
elements published in the latest, cited MPEC, I've done a orbit
diagram. Because of the major semiaxis lenght (a bit more than 1.9
A.U.) and the orbit inclination (24°), this asteroid belongs in the
Hungaria family.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft, QMiPS32
and Astrometrica.
The first check has been done with TheSky
ver. 5, before of the final control on the MPC web site.
1999 QV1
In the night between Aug the 21 and 23, a survey
to hunt for unknown minor planets was under way. In two images, relative
to a star field in Pisces, I noticed a moving object, unusually bright.
Using The Sky and the Minor
Planet Center's computer service (via telnet), I found that the object
was unknown. I was captured by the very unusual proper motion of this body:
it was going south-east, while common main belt objects visible in that
zone (at the date of observation) were expected to have a motion componet
toward west. The following night I've recovered this minor planet, obtaining
useful astrometric positions, getting the designation. This
animation shows the minor planet as it was during this second night:
some galaxies are visible in the same field. I contacted my friend Bob
Linderholm, NE (USA), who has been of help several times. He, few hours
later, was tracking the asteroid, also getting several astrometric measures.
It will be interesting to look at the orbital elements of this body when
they will be available. On Aug the 24, the object has been posted on the
NEO
Confirmation Page of the Minor
Planet Center's. Just few hours before Aug 26, the boby has been moved
from that page, after the collection of 40 astrometric measures alla around
the world; the orbital elements have been published on the following MPECs:
1) 1999-Q12;
2) 1999-Q15;
3) 1999 R09;
4) 1999 R10;
5) 1999 R12;
6) 1999 R13;
7) 1999 R40;
8) 1999 T03;
9) 1999 T11;
10) 1999 U20;
11) 1999 U23;
12) 1999 V31.
On the MPEC 1999 R13 the object is reported to have a 46-days-based orbit.
This means it has been linked with single night observations of something
else.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft, QMiPS32
and Astrometrica.
The first check has been done with TheSky
ver. 5, before of the final control on the MPC web site.
1999 RA
On Sept. the 1th, during a survey deticated to the
research of new minor planets, I've found a new body in Capricornus, which
was not present on the Minor
Planet Center database. The first check has been done, on the field,
with TheSky V.5, using the Lowell Observatory's
astrorb
archive. The object is unusually bright (mag 16.2) and after the opposition,
and this means that the asteroid was also brighter before the discovery!
This animation has been assembled using two frames
grabbed on the discovery night: the body is moving mainly in declination,
as it was near its stationary point (passing from retrograd motion to direct
motion). The following night I confirmed this minor planet and its position
was quite different from the one calculated with the Vaisala method (probably
because its motion was becoming direct). At this point, the Minor
Planet Center has given the designation 1999 RA. The orbital elements
have been published on the following MPECs:
1) 1999 R09;
2) 1999 R11;
3) 1999 R12;
4) 1999 R13;
5) 1999 R16;
6) 1999 R20;
7) 1999 R27;
8) 1999 R40;
9) 1999 S10;
10) 1999 S17;
11) 1999 S19;
12) 1999 T03;
13) 1999 T09;
14) 1999 T38;
15) 1999 U01;
16) 1999 V38;
17) 2001 A27.
On the MPEC 1999 R13 the object is reported to have a 108-days-based orbit.
This means it has been linked with single night observations of something
else.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft. The first
check has been done with TheSky ver.
5, before of the final control on the MPC web site.
1999 RN
On Sept. the 3th, in a field located in Pisces, I
found a minor planet which was not included on the Lowell Database (checked
with TheSky). This was confirmed with
a direct check on the Minor
Planet Center archive. Its magnitude was around 18.5. Because of very
bad weather conditions, the body has been confirmed with some difficulties
the night between 4 and 5 Sept., during the only 30 minutes of clear sky
I had that night. I recovered the asteroid near the position expected by
the Vaisala method. After this confirmation, I received, from the Minor
Planet Center, the designation 1999 RN. It is also available an animation,
which uses two frames captured the second night; the asteroid is easy to
locate, because of its motion. A satellite trail is also visible. The orbital
elements have been published on the following MPECs:
1) 1999 R12;
2) 1999 R13;
3) 1999 R20;
4) 1999 R40;
5) 1999 R46;
6) 1999 S10;
7) 1999 S16;
8) 1999 S19;
9) 1999 T03;
10) 1999 T09;
11) 1999 T49;
12) 1999 U26;
13) 1999 V10.
On the MPEC 1999 R13 the object is reported to have a 15-days-based orbit.
This means it has been linked with single night observations of something
else.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft. The first
check has been done with TheSky ver.
5, before of the final control on the MPC web site.
1999 RS2
On Sept. the 6th, I've found an apparently unknown
object in Acquarius, which magnitude was around 17. The first check has
been done, on the field, with TheSky
V.5, using the Lowell Observatory's astrorb archive. Also, no known
objects in the Minor
Planet Center database. I confirmed the discovery the following night.
Using two frames grabbed the night of discovery, I did this animation,
showing the body while moving against the starry background. So, the Minor
Planet Center has given the designation 1999 RS2. The orbital elements
have been published on the following MPECs:
1) 1999 R16;
2) 1999 R20;
3) 1999 R46;
4) 1999 S10;
5) 1999 T03;
6) 1999 T22;
7) 1999 V10;
8) 1999 V15;
9) 2000 Y44.
On the MPEC 1999 V15, G. V. Williams linked this object to 1998 FX144,
and the principal designation is, fortunately, 1999 RS2.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft. The first
check has been done with TheSky ver.
5, before of the final control on the MPC web site.
1999 RL35
On Sept. the 11st, while measuring positions for
recently discovered asteroids, I've found, in Pisces, a moving object around
mag. 18. A first check , with TheSky
V.5, using the Lowell Observatory's astrorb archive, has given no
known minor planets in that zone at the observing time. The same from the
Minor
Planet Center database. The following night, further astrometry for
the new body has been performed and after this the Minor
Planet Center has assigned the designation 1999 RL35. I did an animation
from two frames grabbed the first night. The orbital elements have been
published on the following MPECs:
1) 1999 R46;
2) 1999 S10;
3) 1999 S11;
4) 1999 S13;
5) 1999 S15;
6) 1999 S19;
7) 1999 T03;
8) 1999 T40;
9) 1999 T11;
10) 1999 U09;
11) 1999 U18;
12) 1999 U26;
13) 1999 V10;
14) 2000 Y42;
15) 2001 A19;
16) 2001 A27.
On the MPEC 1999 S13, G. V. Williams has linked the object with 1979 QG1,
the principal designation being 1999 RL35, so now it is listed as a two-oppositions
body.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft. The first
check has been done with TheSky ver.
5, before of the final control on the MPC web site.
1999 TN4
On Oct. the 4, 1999, during the observation of NEOs,
an apparently, previously unknown object has been found in Pisces. The
field has been checked for known asteroids as usual. The following night,
the object was recovered and, after this, the Minor
Planet Center assigned the provisonal designation 1999 TN4. This
animation shows the body as it appeared on the discovery's night, while
moving against the starry background (1999 TN4 is the object on the right,
in the bottom part of the picture. The one near the center is 7547). The
orbital elements have been published on the following MPECs:
1) 1999 T40;
2) 1999 T41;
3) 1999 U01.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft. The first
check has been done with TheSky ver.
5, before of the final control on the MPC web site.
1999 TZ10
On Oct. the 8, 1999, in Pegasus, a moving object
has been captured in several frames, grabbed in the area near Algenib,
the Gamma Pegasi. It has not been possible to get directly the second night
confirmation, needed to get a designation and the help of other observers
has been very important. L. Robinson, D. Dixon e G. Hug have recovered
the asteroid and thanks to their astrometric data the body received the
designation 1999 TZ10. In this animation 1999
TZ10 appears as on the discovery images. The orbital elements have been
published on the following MPECs:
1) 1999 U01;
2) 1999 U23;
3) 1999 V16.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft. The first
check has been done with TheSky ver.
5, before of the final control on the MPC web site.
2000 YJ8
On Dec. 22, 2000, I was recovering my old discovery 1999 RL35, in Gemini. Few arcmins notherr I noticed a faint, moving body. After a quick check, I found its was a new minor planet. I took three frames, but one of them showed the asteroid too close to a bright star.
Because of bad weather conditions, I asked the help of other observers for the second night observations; Among them, Peter Kusnirak, Ondrejov observatory, got it, in four images
His astrometry has permitted to receive the designation 2000 YJ8. Jim Roe too, Mexico, recovered it and his astrometry has been sent to the Minor Planet Center. Jim observed it also the following nights, on order to have enough data to compute an orbit.
In thisanimation2000 YJ8 appears as on the discovery images.
The orbital elements have been
published on the following MPECs:
1) 2000 Y44;
2) 2001 A16;
3) 2001 A27.
The instruments used where a Celestron CG-11, equipped with a Optec MAXField
0.33X reducer, and a SBIG ST-7 CCD camera. The images have been processed
and analyzed with CCDSoft. The first
check has been done with TheSky ver.
5, before of the final control on the MPC web site.
Ephemerides for
minor planets discovered at my observatory
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