| Parameter |
Value |
| Designation |
C/2011 K1 (Schwartz-Holvorcem) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-04-21T22:15:47.076480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:50Z |
| Obs used |
114 |
| NEO |
- |
| M1 |
11.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2011-06-03.0000000 |
| e |
1.00702797 |
| q (au) |
3.376629 |
| a (au) |
-480.455780 |
| i (deg) |
122.624865 |
| Ω (om, deg) |
70.737393 |
| ω (w, deg) |
167.097081 |
| M (ma, deg) |
0.003938 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.629 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.629 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.980 |
| 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 |
06:43:19.75 |
-17:24:41.7 |
HIP 32039 |
26.26 |
| 2026-06-01 12:00 |
06:43:22.84 |
-17:24:23.4 |
HIP 32039 |
27.05 |
| 2026-06-02 00:00 |
06:43:25.94 |
-17:24:05.4 |
HIP 32039 |
27.85 |
| 2026-06-02 12:00 |
06:43:29.06 |
-17:23:47.7 |
HIP 32039 |
28.65 |
| 2026-06-03 00:00 |
06:43:32.20 |
-17:23:30.3 |
HIP 32278 |
29.42 |
| 2026-06-03 12:00 |
06:43:35.34 |
-17:23:13.1 |
HIP 32278 |
29.40 |
| 2026-06-04 00:00 |
06:43:38.50 |
-17:22:56.3 |
HIP 32278 |
29.40 |
| 2026-06-04 12:00 |
06:43:41.68 |
-17:22:39.7 |
HIP 32278 |
29.41 |
| 2026-06-05 00:00 |
06:43:44.87 |
-17:22:23.4 |
HIP 32278 |
29.45 |
| 2026-06-05 12:00 |
06:43:48.07 |
-17:22:07.3 |
HIP 32278 |
29.49 |
| 2026-06-06 00:00 |
06:43:51.28 |
-17:21:51.6 |
HIP 32278 |
29.56 |
| 2026-06-06 12:00 |
06:43:54.50 |
-17:21:36.1 |
HIP 32278 |
29.64 |
| 2026-06-07 00:00 |
06:43:57.74 |
-17:21:20.9 |
HIP 32278 |
29.74 |
| 2026-06-07 12:00 |
06:44:00.99 |
-17:21:06.0 |
HIP 32278 |
29.85 |
| 2026-06-08 00:00 |
06:44:04.25 |
-17:20:51.4 |
HIP 32278 |
29.98 |
| 2026-06-08 12:00 |
06:44:07.53 |
-17:20:37.0 |
HIP 32278 |
30.13 |
| 2026-06-09 00:00 |
06:44:10.81 |
-17:20:23.0 |
HIP 32278 |
30.30 |
| 2026-06-09 12:00 |
06:44:14.11 |
-17:20:09.2 |
HIP 32278 |
30.48 |
| 2026-06-10 00:00 |
06:44:17.41 |
-17:19:55.7 |
HIP 32278 |
30.67 |
| 2026-06-10 12:00 |
06:44:20.73 |
-17:19:42.5 |
HIP 32278 |
30.88 |
| 2026-06-11 00:00 |
06:44:24.06 |
-17:19:29.6 |
HIP 32278 |
31.11 |
| 2026-06-11 12:00 |
06:44:27.40 |
-17:19:17.0 |
HIP 32278 |
31.35 |
| 2026-06-12 00:00 |
06:44:30.74 |
-17:19:04.7 |
HIP 32278 |
31.61 |
| 2026-06-12 12:00 |
06:44:34.10 |
-17:18:52.6 |
HIP 32278 |
31.88 |
| 2026-06-13 00:00 |
06:44:37.47 |
-17:18:40.9 |
HIP 32278 |
32.17 |
| 2026-06-13 12:00 |
06:44:40.85 |
-17:18:29.4 |
HIP 32278 |
32.47 |
| 2026-06-14 00:00 |
06:44:44.23 |
-17:18:18.3 |
HIP 32278 |
32.79 |
| 2026-06-14 12:00 |
06:44:47.63 |
-17:18:07.4 |
HIP 32278 |
33.11 |
| 2026-06-15 00:00 |
06:44:51.03 |
-17:17:56.8 |
HIP 32278 |
33.45 |
| 2026-06-15 12:00 |
06:44:54.44 |
-17:17:46.5 |
HIP 32377 |
33.65 |
| 2026-06-16 00:00 |
06:44:57.86 |
-17:17:36.5 |
HIP 32377 |
33.64 |
| 2026-06-16 12:00 |
06:45:01.29 |
-17:17:26.8 |
HIP 32377 |
33.64 |
| 2026-06-17 00:00 |
06:45:04.72 |
-17:17:17.4 |
HIP 32377 |
33.65 |
| 2026-06-17 12:00 |
06:45:08.16 |
-17:17:08.3 |
HIP 32377 |
33.68 |
| 2026-06-18 00:00 |
06:45:11.61 |
-17:16:59.5 |
HIP 32377 |
33.73 |
| 2026-06-18 12:00 |
06:45:15.06 |
-17:16:51.0 |
HIP 32377 |
33.79 |
| 2026-06-19 00:00 |
06:45:18.52 |
-17:16:42.7 |
HIP 32377 |
33.87 |
| 2026-06-19 12:00 |
06:45:21.99 |
-17:16:34.8 |
HIP 32349 |
33.93 |
| 2026-06-20 00:00 |
06:45:25.46 |
-17:16:27.1 |
HIP 32349 |
33.89 |
| 2026-06-20 12:00 |
06:45:28.94 |
-17:16:19.8 |
HIP 32557 |
33.54 |
| 2026-06-21 00:00 |
06:45:32.43 |
-17:16:12.7 |
HIP 32557 |
32.84 |
| 2026-06-21 12:00 |
06:45:35.92 |
-17:16:06.0 |
HIP 32557 |
32.14 |
| 2026-06-22 00:00 |
06:45:39.41 |
-17:15:59.5 |
HIP 32557 |
31.45 |