P/2007 T2 (Kowalski)
| Parameter |
Value |
| Designation |
P/2007 T2 (Kowalski) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-09-19T00:32:30.549120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:12Z |
| Obs used |
50 |
| NEO |
Yes |
| M1 |
18.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-11-07.0000000 |
| e |
0.77500898 |
| q (au) |
0.695817 |
| a (au) |
3.092645 |
| i (deg) |
9.896422 |
| Ω (om, deg) |
3.997657 |
| ω (w, deg) |
358.553636 |
| M (ma, deg) |
8.875747 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.609 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.609 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.952 |
| δ90 |
1.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
12:21:32.92 |
-00:58:37.5 |
HIP 60402 |
23.08 |
| 2026-02-03 12:00 |
12:21:22.44 |
-00:57:37.1 |
HIP 60402 |
25.61 |
| 2026-02-04 00:00 |
12:21:11.78 |
-00:56:35.5 |
HIP 60129 |
25.48 |
| 2026-02-04 12:00 |
12:21:00.93 |
-00:55:32.8 |
HIP 60129 |
22.76 |
| 2026-02-05 00:00 |
12:20:49.90 |
-00:54:28.9 |
HIP 60129 |
20.05 |
| 2026-02-05 12:00 |
12:20:38.68 |
-00:53:23.9 |
HIP 60129 |
17.38 |
| 2026-02-06 00:00 |
12:20:27.27 |
-00:52:17.8 |
HIP 60129 |
14.79 |
| 2026-02-06 12:00 |
12:20:15.69 |
-00:51:10.5 |
HIP 60129 |
12.37 |
| 2026-02-07 00:00 |
12:20:03.92 |
-00:50:02.2 |
HIP 60129 |
10.31 |
| 2026-02-07 12:00 |
12:19:51.97 |
-00:48:52.7 |
HIP 60129 |
8.89 |
| 2026-02-08 00:00 |
12:19:39.83 |
-00:47:42.2 |
HIP 60129 |
8.51 |
| 2026-02-08 12:00 |
12:19:27.52 |
-00:46:30.5 |
HIP 60129 |
9.35 |
| 2026-02-09 00:00 |
12:19:15.03 |
-00:45:17.8 |
HIP 60030 |
8.90 |
| 2026-02-09 12:00 |
12:19:02.37 |
-00:44:04.0 |
HIP 60030 |
6.36 |
| 2026-02-10 00:00 |
12:18:49.52 |
-00:42:49.1 |
HIP 60030 |
4.98 |
| 2026-02-10 12:00 |
12:18:36.50 |
-00:41:33.1 |
HIP 60030 |
5.76 |
| 2026-02-11 00:00 |
12:18:23.31 |
-00:40:16.1 |
HIP 60030 |
8.15 |
| 2026-02-11 12:00 |
12:18:09.94 |
-00:38:58.0 |
HIP 60030 |
11.22 |
| 2026-02-12 00:00 |
12:17:56.40 |
-00:37:38.9 |
HIP 60030 |
14.57 |
| 2026-02-12 12:00 |
12:17:42.70 |
-00:36:18.8 |
HIP 60030 |
18.07 |
| 2026-02-13 00:00 |
12:17:28.82 |
-00:34:57.6 |
HIP 60030 |
21.67 |
| 2026-02-13 12:00 |
12:17:14.77 |
-00:33:35.5 |
HIP 60030 |
25.36 |
| 2026-02-14 00:00 |
12:17:00.56 |
-00:32:12.3 |
HIP 60030 |
29.11 |
| 2026-02-14 12:00 |
12:16:46.18 |
-00:30:48.1 |
HIP 59733 |
27.91 |
| 2026-02-15 00:00 |
12:16:31.64 |
-00:29:23.0 |
HIP 59733 |
25.04 |
| 2026-02-15 12:00 |
12:16:16.94 |
-00:27:56.8 |
HIP 59733 |
22.45 |
| 2026-02-16 00:00 |
12:16:02.08 |
-00:26:29.8 |
HIP 59733 |
20.29 |
| 2026-02-16 12:00 |
12:15:47.06 |
-00:25:01.7 |
HIP 59733 |
18.72 |
| 2026-02-17 00:00 |
12:15:31.89 |
-00:23:32.8 |
HIP 59733 |
17.94 |
| 2026-02-17 12:00 |
12:15:16.56 |
-00:22:02.9 |
HIP 59733 |
18.07 |
| 2026-02-18 00:00 |
12:15:01.07 |
-00:20:32.1 |
HIP 59733 |
19.12 |
| 2026-02-18 12:00 |
12:14:45.44 |
-00:19:00.4 |
HIP 59733 |
20.98 |
| 2026-02-19 00:00 |
12:14:29.65 |
-00:17:27.8 |
HIP 59641 |
22.82 |
| 2026-02-19 12:00 |
12:14:13.72 |
-00:15:54.3 |
HIP 59641 |
23.04 |
| 2026-02-20 00:00 |
12:13:57.64 |
-00:14:20.0 |
HIP 59641 |
24.04 |
| 2026-02-20 12:00 |
12:13:41.42 |
-00:12:44.8 |
HIP 59641 |
25.76 |
| 2026-02-21 00:00 |
12:13:25.06 |
-00:11:08.8 |
HIP 59641 |
28.07 |
| 2026-02-21 12:00 |
12:13:08.56 |
-00:09:31.9 |
HIP 59476 |
26.64 |
| 2026-02-22 00:00 |
12:12:51.93 |
-00:07:54.3 |
HIP 59476 |
25.35 |
| 2026-02-22 12:00 |
12:12:35.15 |
-00:06:15.9 |
HIP 59476 |
24.81 |
| 2026-02-23 00:00 |
12:12:18.25 |
-00:04:36.7 |
HIP 59429 |
20.93 |
| 2026-02-23 12:00 |
12:12:01.22 |
-00:02:56.7 |
HIP 59429 |
17.10 |
| 2026-02-24 00:00 |
12:11:44.05 |
-00:01:16.0 |
HIP 59429 |
13.71 |