Results from the Calar Alto observing campaign


In June 2001, we got access to the 1.5m Spanish telescope at Calar Alto (through a cooperation with Thomas Müller and Rainer Kresken from ESA) which allowed us to perform dedicated recovery and follow-up observations of NEOs.

The recovery targets are selected depending on uncertainty range of their ephemeris and the predicted magnitude. We tried to recover all NEOs with magnitudes brighter 22.5 and the length of the line of variation (LOV) smaller than 16 fields of view (FOV) - ( FOV is 6.8*6.8 arcmin ). A typical recovery prediction map looks like the following:

1999 CV8 recovery prediction for June 20th, 2001 at 014010 UT (designed with EasySky developed by Matthias Busch)


During the 4 nights observation period the telescope team Alexandra Seib, Matthias Busch and Felix Hormuth did a very efficient job which resulted in 563 frames of 133 different targets.

Target overview:

recovery NEO        :  14 targets
recovery UNUSUAL    :   4 targets
recovery COMET      :   4 targets
followup NEO        :  41 targets
followup NEOCP      :  22 targets
verfication of IDs  :  25 targets
new discoveries     :   9 targets
others              :  14 targets

Observing strategy:

To recover a target we observe along the LOV starting from the centre. Normally we take 2 or 3 images of each field. An installed IP connection between the telescopes imaging computer and the review team (A. Doppler, A. Gnädig and R. Stoss) located in Germany allows a quasi simultaneous inspection and measurement of the images right after the exposure. When the target is detected the search along the LOV is stopped and the observing team looks for another object (e.g. from the NEOCP) until the next planned recovery or follow up attempt has to be started.

Some of the NEO recovery targets were very faint and fast moving. We are using the "track and stack" technique utilized in the latest version of Herbert Raab's software package Astrometrica , to improve the S/N ratio of the detection. In this way it was possible to observe FMOs as faint as about 22 mag. Some introduction about "track and stack" you can find here .

Credits:

Robert H. McNaught (413) and Erich Meyer (540) reported one night observations of J88R01O and J99Y00A before. Using this observations it was quite easy to get the 2nd night observations for completing the their recovery attempts.

Special Note:

2nd night wanted for 1999 GT3.



Successfully recoveries:

Atens, Apollos, Amors

1998 HL1 , 1999 CV8 , 1999 GT3 , 1999 MM
1999 YA , 2000 FL10 , 2000 OK8 , 1999 RL45
1999 TN12 ,

Marscrossers

1988 R01 , 1999 XS16 ,

Comets

P/2001 M1 Helin (1987 Q3)



Follow-up and NEOCP :


Follow-up:

Objekt

Typ

arc alt

arc neu

V

speed

a

e

i

q

2000 RS11

Apollo

264

290

20.4m

0.88"/min

1.28

0.32

17

0.87

2000 VJ61

Apollo

227

230

18.0m

0.94"/min

2.18

0.56

19

0.95

2000 WL63

Amor

179

208

21.1m

1.68"/min

1.43

0.30

18

1.00

2000 YF29

Apollo

173

207

20.3m

0.95"/min

1.49

0.37

6

0.94

2001 AO2

Amor

146

173

20.3m

2.40"/min

3.07

0.61

20

1.20

2001 FY

Amor

88

97

18.9m

1.35"/min

1.89

0.33

5

1.27

2001 FZ

Amor

78

97

21.3m

0.93"/min

2.43

0.57

7

1.04

2001 FA1

Amor

69

97

20.8m

1.13"/min

1.88

0.36

34

1.20

2001 FD90

Amor

45

85

19.0m

2.72"/min

2.05

0.48

7

1.07

2001 FE90

Apollo

37

 

19.4m

1.77"/min

1.93

0.50

9

0.97

2001 FM129

Apollo

64

83

20.9m

1.03"/min

1.18

0.63

2

0.44

2001 HA8

Amor

76

88

18.4m

0.95"/min

2.38

0.53

12

1.11

2001 HK31

Amor

35

51

18.7m

2.08"/min

2.44

0.57

7

1.05

2001 JL1

Amor

14

39

19.8m

0.58"/min

2.55

0.52

27

1.22

2001 JM1

Amor

32

40

18.6m

0.87"/min

1.46

0.31

17

1.01

2001 JU2

Amor

16

35

19.9m

0.41"/min

1.52

0.27

4

1.11

2001 JV2

Apollo

13

35

20.9m

0.39"/min

1.31

0.24

48

0.99

2001 JW2

Apollo

42

46

18.4m

2.41"/min

1.70

0.49

10

0.87

2001 KR1

Apollo

28

31

17.7m

6.09"/min

1.26

0.84

23

0.20

2001 KO2

Apollo

14

27

19.0m

0.92"/min

2.51

0.61

12

0.99

2001 KO20

Amor

5

31

20.1m

1.63"/min

1.22

0.12

14

1.07

2001 KO41

Amor

10

26

20.6m

0.36"/min

2.02

0.44

5

1.13

2001 KP41

Amor

3 opp

3 opp

15.5m

1.33"/min

2.86

0.55

11

1.28

2001 KD55

Amor

7

27

20.1m

0.62"/min

3.35

0.62

10

1.27

2001 KY66

Apollo

5

20

18.8m

0.42"/min

1.87

0.51

11

0.92

2001 KZ66

Apollo

15

22

19.8m

0.34"/min

1.51

0.42

17

0.88

2001 KA67

Apollo

18

20

16.7m

4.31"/min

1.80

0.70

22

0.54

2001 KB67

Aten

19

20

17.9m

2.04"/min

0.96

0.38

17

0.60

2001 KD68

Amor

14

19

20.8m

1.87"/min

2.38

0.51

2

1.18

2001 LC

Apollo

15

20

19.0m

3.09"/min

1.05

0.68

17

0.34

2001 LF

Amor

15

16

17.5m

2.17"/min

1.60

0.27

16

1.17

2001 MD1

Amor

3

4

17.3m

3.76"/min

2.11

0.50

6

1.06


NEO Confirmation Page:

Objekt

MPEC

Typ

V

speed

a

e

i

q

2001 LD6

MPEC 2001-M11

Amor

18.6m

1.41"/min

2.74

0.62

9

1.03

2001 LE6

MPEC 2001-M14

Apollo

17.8m

2.84"/min

1.21

0.69

13

0.37

2001 LF6

---

19.6m

2.38"/min

 

 

 

 

2001 LO7

MPEC 2001-M17

Apollo

19.6m

0.82"/min

2.15

0.84

26

0.33

2001 MV

---

Unusual

18.8m

0.58"/min

2.29

0.30

22

1.61

2001 MD1

MPEC 2001-M16

Amor

17.6m

2.46"/min

2.11

0.50

6

1.06

2001 ME1

MPEC 2001-M12

PHA

14.4m

6.05"/min

2.65

0.87

6

0.36

2001 MG1

MPEC 2001-M15

PHA

17.0m

2.52"/min

2.51

0.64

28

0.90

2001 MK3

---

Amor

18.9m

0.59"/min

1.67

0.25

30

1.26

2001 MM3

---

Unusual

16.6m

1.34"/min

2.72

0.40

29

1.62

2001 MQ3

MPEC 2001-M28

Amor

18.7m

0.55"/min

2.23

0.45

6

1.22

2001 MR3

MPEC 2001-M29

Amor

17.0m

0.85"/min

2.36

0.46

5

1.29

2001 MY7

MPEC 2001-M38

Amor

18.0m

4.76"/min

2.93

0.63

21

1.09

2001 MZ7

MPEC 2001-M39

Amor

17.5m

0.56"/min

1.78

0.29

24

1.27

2001 MA8

MPEC 2001-M48

Amor

18.1m

1.32"/min

2.37

0.47

8

1.26