C/1970 K1 (White-Ortiz-Bolelli)
| Parameter |
Value |
| Designation |
C/1970 K1 (White-Ortiz-Bolelli) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1970-05-14T11:32:18.864960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:19Z |
| Obs used |
9 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1970-05-29.0000000 |
| e |
0.99994911 |
| q (au) |
0.008844 |
| a (au) |
173.786769 |
| i (deg) |
138.952249 |
| Ω (om, deg) |
336.819676 |
| ω (w, deg) |
61.102946 |
| M (ma, deg) |
0.006246 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.051 + 4.003\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.051 |
| n |
4.003 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
06:46:08.39 |
-12:06:28.5 |
HIP 32513 |
15.34 |
| 2026-02-03 12:00 |
06:46:07.07 |
-12:06:19.9 |
HIP 32513 |
15.70 |
| 2026-02-04 00:00 |
06:46:05.75 |
-12:06:11.3 |
HIP 32513 |
16.05 |
| 2026-02-04 12:00 |
06:46:04.44 |
-12:06:02.5 |
HIP 32513 |
16.40 |
| 2026-02-05 00:00 |
06:46:03.13 |
-12:05:53.7 |
HIP 32513 |
16.75 |
| 2026-02-05 12:00 |
06:46:01.84 |
-12:05:44.8 |
HIP 32513 |
17.10 |
| 2026-02-06 00:00 |
06:46:00.55 |
-12:05:35.8 |
HIP 32513 |
17.45 |
| 2026-02-06 12:00 |
06:45:59.27 |
-12:05:26.7 |
HIP 32513 |
17.79 |
| 2026-02-07 00:00 |
06:45:58.00 |
-12:05:17.6 |
HIP 32513 |
18.14 |
| 2026-02-07 12:00 |
06:45:56.74 |
-12:05:08.3 |
HIP 32513 |
18.48 |
| 2026-02-08 00:00 |
06:45:55.48 |
-12:04:59.0 |
HIP 32513 |
18.82 |
| 2026-02-08 12:00 |
06:45:54.24 |
-12:04:49.6 |
HIP 32513 |
19.16 |
| 2026-02-09 00:00 |
06:45:53.00 |
-12:04:40.1 |
HIP 32513 |
19.50 |
| 2026-02-09 12:00 |
06:45:51.77 |
-12:04:30.5 |
HIP 32513 |
19.84 |
| 2026-02-10 00:00 |
06:45:50.55 |
-12:04:20.8 |
HIP 32513 |
20.18 |
| 2026-02-10 12:00 |
06:45:49.35 |
-12:04:11.1 |
HIP 32513 |
20.51 |
| 2026-02-11 00:00 |
06:45:48.14 |
-12:04:01.3 |
HIP 32513 |
20.85 |
| 2026-02-11 12:00 |
06:45:46.95 |
-12:03:51.4 |
HIP 32513 |
21.18 |
| 2026-02-12 00:00 |
06:45:45.77 |
-12:03:41.4 |
HIP 32513 |
21.51 |
| 2026-02-12 12:00 |
06:45:44.60 |
-12:03:31.4 |
HIP 32513 |
21.84 |
| 2026-02-13 00:00 |
06:45:43.44 |
-12:03:21.2 |
HIP 32513 |
22.17 |
| 2026-02-13 12:00 |
06:45:42.28 |
-12:03:11.0 |
HIP 32513 |
22.49 |
| 2026-02-14 00:00 |
06:45:41.14 |
-12:03:00.8 |
HIP 32513 |
22.82 |
| 2026-02-14 12:00 |
06:45:40.01 |
-12:02:50.4 |
HIP 32513 |
23.14 |
| 2026-02-15 00:00 |
06:45:38.88 |
-12:02:40.0 |
HIP 32513 |
23.46 |
| 2026-02-15 12:00 |
06:45:37.77 |
-12:02:29.5 |
HIP 32513 |
23.78 |
| 2026-02-16 00:00 |
06:45:36.67 |
-12:02:18.9 |
HIP 32513 |
24.10 |
| 2026-02-16 12:00 |
06:45:35.57 |
-12:02:08.3 |
HIP 32513 |
24.41 |
| 2026-02-17 00:00 |
06:45:34.49 |
-12:01:57.6 |
HIP 32513 |
24.73 |
| 2026-02-17 12:00 |
06:45:33.42 |
-12:01:46.8 |
HIP 32513 |
25.04 |
| 2026-02-18 00:00 |
06:45:32.35 |
-12:01:36.0 |
HIP 32513 |
25.35 |
| 2026-02-18 12:00 |
06:45:31.30 |
-12:01:25.1 |
HIP 32513 |
25.66 |
| 2026-02-19 00:00 |
06:45:30.26 |
-12:01:14.1 |
HIP 32513 |
25.97 |
| 2026-02-19 12:00 |
06:45:29.23 |
-12:01:03.1 |
HIP 32513 |
26.27 |
| 2026-02-20 00:00 |
06:45:28.21 |
-12:00:52.0 |
HIP 32513 |
26.58 |
| 2026-02-20 12:00 |
06:45:27.20 |
-12:00:40.9 |
HIP 32513 |
26.88 |
| 2026-02-21 00:00 |
06:45:26.20 |
-12:00:29.6 |
HIP 32513 |
27.18 |
| 2026-02-21 12:00 |
06:45:25.22 |
-12:00:18.4 |
HIP 32513 |
27.48 |
| 2026-02-22 00:00 |
06:45:24.24 |
-12:00:07.0 |
HIP 32513 |
27.77 |
| 2026-02-22 12:00 |
06:45:23.28 |
-11:59:55.6 |
HIP 32513 |
28.07 |
| 2026-02-23 00:00 |
06:45:22.32 |
-11:59:44.2 |
HIP 32513 |
28.36 |
| 2026-02-23 12:00 |
06:45:21.38 |
-11:59:32.7 |
HIP 32513 |
28.65 |
| 2026-02-24 00:00 |
06:45:20.45 |
-11:59:21.1 |
HIP 32513 |
28.94 |