| 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) |
| 2026-06-01 00:00 |
09:12:18.09 |
-30:22:40.8 |
HIP 45001 |
30.57 |
| 2026-06-01 12:00 |
09:12:19.08 |
-30:22:19.6 |
HIP 45001 |
30.78 |
| 2026-06-02 00:00 |
09:12:20.09 |
-30:21:58.4 |
HIP 45001 |
30.99 |
| 2026-06-02 12:00 |
09:12:21.11 |
-30:21:37.5 |
HIP 45001 |
31.22 |
| 2026-06-03 00:00 |
09:12:22.16 |
-30:21:16.7 |
HIP 45001 |
31.45 |
| 2026-06-03 12:00 |
09:12:23.23 |
-30:20:56.0 |
HIP 45001 |
31.69 |
| 2026-06-04 00:00 |
09:12:24.31 |
-30:20:35.6 |
HIP 45001 |
31.93 |
| 2026-06-04 12:00 |
09:12:25.42 |
-30:20:15.2 |
HIP 45001 |
32.19 |
| 2026-06-05 00:00 |
09:12:26.54 |
-30:19:55.1 |
HIP 45001 |
32.45 |
| 2026-06-05 12:00 |
09:12:27.69 |
-30:19:35.1 |
HIP 45001 |
32.72 |
| 2026-06-06 00:00 |
09:12:28.85 |
-30:19:15.3 |
HIP 45001 |
33.00 |
| 2026-06-06 12:00 |
09:12:30.03 |
-30:18:55.6 |
HIP 45001 |
33.28 |
| 2026-06-07 00:00 |
09:12:31.24 |
-30:18:36.1 |
HIP 45394 |
33.08 |
| 2026-06-07 12:00 |
09:12:32.46 |
-30:18:16.8 |
HIP 45394 |
32.86 |
| 2026-06-08 00:00 |
09:12:33.70 |
-30:17:57.7 |
HIP 45394 |
32.63 |
| 2026-06-08 12:00 |
09:12:34.96 |
-30:17:38.7 |
HIP 45394 |
32.40 |
| 2026-06-09 00:00 |
09:12:36.23 |
-30:17:19.9 |
HIP 45394 |
32.18 |
| 2026-06-09 12:00 |
09:12:37.53 |
-30:17:01.3 |
HIP 45394 |
31.95 |
| 2026-06-10 00:00 |
09:12:38.84 |
-30:16:42.8 |
HIP 45394 |
31.72 |
| 2026-06-10 12:00 |
09:12:40.18 |
-30:16:24.5 |
HIP 45394 |
31.49 |
| 2026-06-11 00:00 |
09:12:41.53 |
-30:16:06.5 |
HIP 45394 |
31.26 |
| 2026-06-11 12:00 |
09:12:42.90 |
-30:15:48.5 |
HIP 45394 |
31.03 |
| 2026-06-12 00:00 |
09:12:44.29 |
-30:15:30.8 |
HIP 45394 |
30.80 |
| 2026-06-12 12:00 |
09:12:45.69 |
-30:15:13.3 |
HIP 45394 |
30.56 |
| 2026-06-13 00:00 |
09:12:47.12 |
-30:14:55.9 |
HIP 45394 |
30.33 |
| 2026-06-13 12:00 |
09:12:48.56 |
-30:14:38.7 |
HIP 45394 |
30.10 |
| 2026-06-14 00:00 |
09:12:50.02 |
-30:14:21.7 |
HIP 45394 |
29.87 |
| 2026-06-14 12:00 |
09:12:51.49 |
-30:14:04.9 |
HIP 45394 |
29.63 |
| 2026-06-15 00:00 |
09:12:52.99 |
-30:13:48.3 |
HIP 45394 |
29.40 |
| 2026-06-15 12:00 |
09:12:54.50 |
-30:13:31.9 |
HIP 45394 |
29.16 |
| 2026-06-16 00:00 |
09:12:56.03 |
-30:13:15.6 |
HIP 45394 |
28.93 |
| 2026-06-16 12:00 |
09:12:57.57 |
-30:12:59.6 |
HIP 45394 |
28.70 |
| 2026-06-17 00:00 |
09:12:59.13 |
-30:12:43.7 |
HIP 45394 |
28.46 |
| 2026-06-17 12:00 |
09:13:00.71 |
-30:12:28.1 |
HIP 45394 |
28.23 |
| 2026-06-18 00:00 |
09:13:02.31 |
-30:12:12.6 |
HIP 45394 |
27.99 |
| 2026-06-18 12:00 |
09:13:03.92 |
-30:11:57.4 |
HIP 45394 |
27.76 |
| 2026-06-19 00:00 |
09:13:05.55 |
-30:11:42.3 |
HIP 45394 |
27.53 |
| 2026-06-19 12:00 |
09:13:07.19 |
-30:11:27.4 |
HIP 45394 |
27.29 |
| 2026-06-20 00:00 |
09:13:08.85 |
-30:11:12.7 |
HIP 45394 |
27.06 |
| 2026-06-20 12:00 |
09:13:10.53 |
-30:10:58.3 |
HIP 45394 |
26.83 |
| 2026-06-21 00:00 |
09:13:12.22 |
-30:10:44.0 |
HIP 45394 |
26.60 |
| 2026-06-21 12:00 |
09:13:13.93 |
-30:10:29.9 |
HIP 45394 |
26.37 |
| 2026-06-22 00:00 |
09:13:15.65 |
-30:10:16.0 |
HIP 45394 |
26.14 |