| 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) |
| 2026-07-29 00:00 |
06:48:59.11 |
-11:25:32.6 |
HIP 32758 |
13.44 |
| 2026-07-29 12:00 |
06:49:00.46 |
-11:25:39.3 |
HIP 32758 |
13.09 |
| 2026-07-30 00:00 |
06:49:01.81 |
-11:25:46.0 |
HIP 32758 |
12.74 |
| 2026-07-30 12:00 |
06:49:03.15 |
-11:25:52.9 |
HIP 32758 |
12.39 |
| 2026-07-31 00:00 |
06:49:04.49 |
-11:25:59.8 |
HIP 32758 |
12.05 |
| 2026-07-31 12:00 |
06:49:05.82 |
-11:26:06.8 |
HIP 32758 |
11.70 |
| 2026-08-01 00:00 |
06:49:07.14 |
-11:26:13.9 |
HIP 32758 |
11.35 |
| 2026-08-01 12:00 |
06:49:08.46 |
-11:26:21.1 |
HIP 32758 |
11.01 |
| 2026-08-02 00:00 |
06:49:09.78 |
-11:26:28.4 |
HIP 32758 |
10.66 |
| 2026-08-02 12:00 |
06:49:11.08 |
-11:26:35.8 |
HIP 32758 |
10.32 |
| 2026-08-03 00:00 |
06:49:12.39 |
-11:26:43.2 |
HIP 32758 |
9.98 |
| 2026-08-03 12:00 |
06:49:13.68 |
-11:26:50.8 |
HIP 32758 |
9.64 |
| 2026-08-04 00:00 |
06:49:14.97 |
-11:26:58.4 |
HIP 32758 |
9.30 |
| 2026-08-04 12:00 |
06:49:16.26 |
-11:27:06.1 |
HIP 32758 |
8.96 |
| 2026-08-05 00:00 |
06:49:17.53 |
-11:27:13.9 |
HIP 32758 |
8.62 |
| 2026-08-05 12:00 |
06:49:18.80 |
-11:27:21.8 |
HIP 32758 |
8.28 |
| 2026-08-06 00:00 |
06:49:20.07 |
-11:27:29.8 |
HIP 32758 |
7.94 |
| 2026-08-06 12:00 |
06:49:21.33 |
-11:27:37.9 |
HIP 32758 |
7.61 |
| 2026-08-07 00:00 |
06:49:22.58 |
-11:27:46.0 |
HIP 32758 |
7.27 |
| 2026-08-07 12:00 |
06:49:23.82 |
-11:27:54.2 |
HIP 32758 |
6.94 |
| 2026-08-08 00:00 |
06:49:25.06 |
-11:28:02.5 |
HIP 32758 |
6.60 |
| 2026-08-08 12:00 |
06:49:26.29 |
-11:28:10.9 |
HIP 32758 |
6.27 |
| 2026-08-09 00:00 |
06:49:27.52 |
-11:28:19.4 |
HIP 32758 |
5.94 |
| 2026-08-09 12:00 |
06:49:28.73 |
-11:28:27.9 |
HIP 32758 |
5.61 |
| 2026-08-10 00:00 |
06:49:29.94 |
-11:28:36.5 |
HIP 32758 |
5.29 |
| 2026-08-10 12:00 |
06:49:31.15 |
-11:28:45.2 |
HIP 32758 |
4.96 |
| 2026-08-11 00:00 |
06:49:32.34 |
-11:28:54.0 |
HIP 32758 |
4.64 |
| 2026-08-11 12:00 |
06:49:33.53 |
-11:29:02.9 |
HIP 32758 |
4.31 |
| 2026-08-12 00:00 |
06:49:34.71 |
-11:29:11.8 |
HIP 32758 |
3.99 |
| 2026-08-12 12:00 |
06:49:35.88 |
-11:29:20.8 |
HIP 32758 |
3.67 |
| 2026-08-13 00:00 |
06:49:37.05 |
-11:29:29.9 |
HIP 32758 |
3.36 |
| 2026-08-13 12:00 |
06:49:38.20 |
-11:29:39.1 |
HIP 32758 |
3.04 |
| 2026-08-14 00:00 |
06:49:39.35 |
-11:29:48.3 |
HIP 32758 |
2.73 |
| 2026-08-14 12:00 |
06:49:40.49 |
-11:29:57.6 |
HIP 32758 |
2.43 |
| 2026-08-15 00:00 |
06:49:41.62 |
-11:30:07.0 |
HIP 32758 |
2.13 |
| 2026-08-15 12:00 |
06:49:42.75 |
-11:30:16.5 |
HIP 32758 |
1.84 |
| 2026-08-16 00:00 |
06:49:43.86 |
-11:30:26.0 |
HIP 32758 |
1.56 |
| 2026-08-16 12:00 |
06:49:44.97 |
-11:30:35.6 |
HIP 32758 |
1.31 |
| 2026-08-17 00:00 |
06:49:46.07 |
-11:30:45.3 |
HIP 32758 |
1.08 |
| 2026-08-17 12:00 |
06:49:47.16 |
-11:30:55.1 |
HIP 32758 |
0.92 |
| 2026-08-18 00:00 |
06:49:48.24 |
-11:31:04.9 |
HIP 32758 |
0.84 |
| 2026-08-18 12:00 |
06:49:49.32 |
-11:31:14.8 |
HIP 32758 |
0.88 |
| 2026-08-19 00:00 |
06:49:50.38 |
-11:31:24.7 |
HIP 32758 |
1.01 |