C/1970 K1 (White-Ortiz-Bolelli)

Metadata

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

C/1970 K1 (White-Ortiz-Bolelli) · Magnitude (Full range)

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