| Parameter |
Value |
| Designation |
C/1999 K7 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-02-24T18:38:47.711040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1999-06-03.0000000 |
| e |
0.99652152 |
| q (au) |
2.322718 |
| a (au) |
667.740065 |
| i (deg) |
135.158550 |
| Ω (om, deg) |
50.330978 |
| ω (w, deg) |
104.660079 |
| M (ma, deg) |
0.005611 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.412 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.412 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.733 |
| k |
1.000 |
| δ90 |
10.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
09:15:55.73 |
-30:03:01.4 |
HIP 45514 |
9.12 |
| 2026-07-29 12:00 |
09:15:58.18 |
-30:03:03.8 |
HIP 45514 |
8.65 |
| 2026-07-30 00:00 |
09:16:00.64 |
-30:03:06.4 |
HIP 45514 |
8.18 |
| 2026-07-30 12:00 |
09:16:03.10 |
-30:03:09.2 |
HIP 45514 |
7.73 |
| 2026-07-31 00:00 |
09:16:05.57 |
-30:03:12.3 |
HIP 45514 |
7.28 |
| 2026-07-31 12:00 |
09:16:08.04 |
-30:03:15.6 |
HIP 45514 |
6.84 |
| 2026-08-01 00:00 |
09:16:10.51 |
-30:03:19.1 |
HIP 45514 |
6.41 |
| 2026-08-01 12:00 |
09:16:12.98 |
-30:03:22.8 |
HIP 45514 |
6.00 |
| 2026-08-02 00:00 |
09:16:15.46 |
-30:03:26.7 |
HIP 45514 |
5.61 |
| 2026-08-02 12:00 |
09:16:17.94 |
-30:03:30.9 |
HIP 45514 |
5.23 |
| 2026-08-03 00:00 |
09:16:20.42 |
-30:03:35.3 |
HIP 45514 |
4.89 |
| 2026-08-03 12:00 |
09:16:22.90 |
-30:03:39.9 |
HIP 45514 |
4.58 |
| 2026-08-04 00:00 |
09:16:25.39 |
-30:03:44.7 |
HIP 45514 |
4.31 |
| 2026-08-04 12:00 |
09:16:27.88 |
-30:03:49.7 |
HIP 45514 |
4.10 |
| 2026-08-05 00:00 |
09:16:30.37 |
-30:03:54.9 |
HIP 45514 |
3.95 |
| 2026-08-05 12:00 |
09:16:32.86 |
-30:04:00.4 |
HIP 45514 |
3.86 |
| 2026-08-06 00:00 |
09:16:35.35 |
-30:04:06.1 |
HIP 45514 |
3.85 |
| 2026-08-06 12:00 |
09:16:37.84 |
-30:04:12.0 |
HIP 45514 |
3.91 |
| 2026-08-07 00:00 |
09:16:40.34 |
-30:04:18.1 |
HIP 45514 |
4.04 |
| 2026-08-07 12:00 |
09:16:42.83 |
-30:04:24.4 |
HIP 45514 |
4.23 |
| 2026-08-08 00:00 |
09:16:45.33 |
-30:04:30.9 |
HIP 45514 |
4.49 |
| 2026-08-08 12:00 |
09:16:47.82 |
-30:04:37.7 |
HIP 45514 |
4.79 |
| 2026-08-09 00:00 |
09:16:50.32 |
-30:04:44.7 |
HIP 45514 |
5.13 |
| 2026-08-09 12:00 |
09:16:52.82 |
-30:04:51.9 |
HIP 45514 |
5.50 |
| 2026-08-10 00:00 |
09:16:55.31 |
-30:04:59.3 |
HIP 45514 |
5.90 |
| 2026-08-10 12:00 |
09:16:57.81 |
-30:05:06.9 |
HIP 45514 |
6.32 |
| 2026-08-11 00:00 |
09:17:00.30 |
-30:05:14.7 |
HIP 45514 |
6.76 |
| 2026-08-11 12:00 |
09:17:02.80 |
-30:05:22.7 |
HIP 45514 |
7.22 |
| 2026-08-12 00:00 |
09:17:05.29 |
-30:05:31.0 |
HIP 45514 |
7.68 |
| 2026-08-12 12:00 |
09:17:07.79 |
-30:05:39.5 |
HIP 45514 |
8.16 |
| 2026-08-13 00:00 |
09:17:10.28 |
-30:05:48.1 |
HIP 45514 |
8.64 |
| 2026-08-13 12:00 |
09:17:12.77 |
-30:05:57.0 |
HIP 45514 |
9.13 |
| 2026-08-14 00:00 |
09:17:15.26 |
-30:06:06.1 |
HIP 45514 |
9.63 |
| 2026-08-14 12:00 |
09:17:17.75 |
-30:06:15.4 |
HIP 45514 |
10.14 |
| 2026-08-15 00:00 |
09:17:20.23 |
-30:06:25.0 |
HIP 45514 |
10.64 |
| 2026-08-15 12:00 |
09:17:22.72 |
-30:06:34.7 |
HIP 45514 |
11.16 |
| 2026-08-16 00:00 |
09:17:25.20 |
-30:06:44.6 |
HIP 45514 |
11.67 |
| 2026-08-16 12:00 |
09:17:27.67 |
-30:06:54.7 |
HIP 45514 |
12.19 |
| 2026-08-17 00:00 |
09:17:30.15 |
-30:07:05.1 |
HIP 45514 |
12.71 |
| 2026-08-17 12:00 |
09:17:32.62 |
-30:07:15.6 |
HIP 45514 |
13.24 |
| 2026-08-18 00:00 |
09:17:35.09 |
-30:07:26.4 |
HIP 45514 |
13.77 |
| 2026-08-18 12:00 |
09:17:37.56 |
-30:07:37.3 |
HIP 45514 |
14.29 |
| 2026-08-19 00:00 |
09:17:40.02 |
-30:07:48.5 |
HIP 45514 |
14.82 |