| 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) |
| 2026-03-26 00:00 |
06:44:47.03 |
-11:46:43.2 |
HIP 32344 |
22.43 |
| 2026-03-26 12:00 |
06:44:46.87 |
-11:46:30.1 |
HIP 32344 |
22.22 |
| 2026-03-27 00:00 |
06:44:46.72 |
-11:46:17.0 |
HIP 32344 |
22.02 |
| 2026-03-27 12:00 |
06:44:46.59 |
-11:46:04.0 |
HIP 32344 |
21.81 |
| 2026-03-28 00:00 |
06:44:46.47 |
-11:45:50.9 |
HIP 32344 |
21.61 |
| 2026-03-28 12:00 |
06:44:46.36 |
-11:45:37.9 |
HIP 32344 |
21.40 |
| 2026-03-29 00:00 |
06:44:46.27 |
-11:45:24.8 |
HIP 32344 |
21.19 |
| 2026-03-29 12:00 |
06:44:46.19 |
-11:45:11.8 |
HIP 32344 |
20.99 |
| 2026-03-30 00:00 |
06:44:46.12 |
-11:44:58.8 |
HIP 32344 |
20.78 |
| 2026-03-30 12:00 |
06:44:46.06 |
-11:44:45.8 |
HIP 32344 |
20.57 |
| 2026-03-31 00:00 |
06:44:46.02 |
-11:44:32.8 |
HIP 32344 |
20.37 |
| 2026-03-31 12:00 |
06:44:46.00 |
-11:44:19.8 |
HIP 32344 |
20.16 |
| 2026-04-01 00:00 |
06:44:45.98 |
-11:44:06.9 |
HIP 32344 |
19.95 |
| 2026-04-01 12:00 |
06:44:45.98 |
-11:43:53.9 |
HIP 32344 |
19.74 |
| 2026-04-02 00:00 |
06:44:45.99 |
-11:43:41.0 |
HIP 32344 |
19.53 |
| 2026-04-02 12:00 |
06:44:46.02 |
-11:43:28.1 |
HIP 32344 |
19.32 |
| 2026-04-03 00:00 |
06:44:46.06 |
-11:43:15.2 |
HIP 32344 |
19.11 |
| 2026-04-03 12:00 |
06:44:46.11 |
-11:43:02.3 |
HIP 32344 |
18.90 |
| 2026-04-04 00:00 |
06:44:46.17 |
-11:42:49.5 |
HIP 32344 |
18.69 |
| 2026-04-04 12:00 |
06:44:46.25 |
-11:42:36.6 |
HIP 32344 |
18.48 |
| 2026-04-05 00:00 |
06:44:46.34 |
-11:42:23.8 |
HIP 32344 |
18.27 |
| 2026-04-05 12:00 |
06:44:46.45 |
-11:42:11.1 |
HIP 32344 |
18.06 |
| 2026-04-06 00:00 |
06:44:46.56 |
-11:41:58.3 |
HIP 32344 |
17.84 |
| 2026-04-06 12:00 |
06:44:46.69 |
-11:41:45.6 |
HIP 32344 |
17.63 |
| 2026-04-07 00:00 |
06:44:46.84 |
-11:41:32.9 |
HIP 32344 |
17.42 |
| 2026-04-07 12:00 |
06:44:46.99 |
-11:41:20.2 |
HIP 32344 |
17.20 |
| 2026-04-08 00:00 |
06:44:47.16 |
-11:41:07.5 |
HIP 32344 |
16.99 |
| 2026-04-08 12:00 |
06:44:47.35 |
-11:40:54.9 |
HIP 32344 |
16.78 |
| 2026-04-09 00:00 |
06:44:47.54 |
-11:40:42.3 |
HIP 32344 |
16.56 |
| 2026-04-09 12:00 |
06:44:47.75 |
-11:40:29.8 |
HIP 32344 |
16.35 |
| 2026-04-10 00:00 |
06:44:47.97 |
-11:40:17.2 |
HIP 32344 |
16.13 |
| 2026-04-10 12:00 |
06:44:48.21 |
-11:40:04.7 |
HIP 32344 |
15.91 |
| 2026-04-11 00:00 |
06:44:48.45 |
-11:39:52.3 |
HIP 32344 |
15.70 |
| 2026-04-11 12:00 |
06:44:48.71 |
-11:39:39.8 |
HIP 32344 |
15.48 |
| 2026-04-12 00:00 |
06:44:48.99 |
-11:39:27.4 |
HIP 32344 |
15.26 |
| 2026-04-12 12:00 |
06:44:49.27 |
-11:39:15.1 |
HIP 32344 |
15.05 |
| 2026-04-13 00:00 |
06:44:49.57 |
-11:39:02.8 |
HIP 32344 |
14.83 |
| 2026-04-13 12:00 |
06:44:49.88 |
-11:38:50.5 |
HIP 32344 |
14.61 |
| 2026-04-14 00:00 |
06:44:50.21 |
-11:38:38.2 |
HIP 32344 |
14.39 |
| 2026-04-14 12:00 |
06:44:50.55 |
-11:38:26.0 |
HIP 32344 |
14.17 |
| 2026-04-15 00:00 |
06:44:50.90 |
-11:38:13.9 |
HIP 32344 |
13.96 |
| 2026-04-15 12:00 |
06:44:51.26 |
-11:38:01.7 |
HIP 32344 |
13.74 |
| 2026-04-16 00:00 |
06:44:51.64 |
-11:37:49.7 |
HIP 32344 |
13.52 |