C/2023 RN3 (ATLAS)

Metadata

Parameter Value
Designation C/2023 RN3 (ATLAS)
Type C
Perihelion (tp_cal, UTC) 2023-01-18T00:08:18.320640Z
Orbit solution date (soln_date, UTC) 2025-09-16T12:42:50Z
Obs used 637
NEO -
M1 6.500
K1 11.250
PC -
Osculating Elements
Parameter Value
Epoch (epoch_cal, TDB) 2023-11-02.0000000
e 0.49041086
q (au) 5.172310
a (au) 10.149962
i (deg) 10.358010
Ω (om, deg) 207.067405
ω (w, deg) 130.302280
M (ma, deg) 8.777913

Magnitude

C/2023 RN3 (ATLAS) · Magnitude (Full range)

Scatter + Global Linear

$$ M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

Model Parameters

Parameter Value
H0 -
n -
gf -
gb -
k -
δ90 -
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 04:33:31.05 +15:43:28.5 HIP 21317 20.32
2026-06-01 12:00 04:33:49.52 +15:43:57.8 HIP 21317 17.56
2026-06-02 00:00 04:34:07.98 +15:44:26.9 HIP 21317 15.61
2026-06-02 12:00 04:34:26.43 +15:44:55.6 HIP 21317 14.80
2026-06-03 00:00 04:34:44.88 +15:45:24.0 HIP 21317 15.30
2026-06-03 12:00 04:35:03.32 +15:45:52.2 HIP 21317 16.99
2026-06-04 00:00 04:35:21.75 +15:46:20.0 HIP 21317 19.57
2026-06-04 12:00 04:35:40.18 +15:46:47.6 HIP 21474 15.51
2026-06-05 00:00 04:35:58.60 +15:47:14.8 HIP 21474 11.25
2026-06-05 12:00 04:36:17.01 +15:47:41.8 HIP 21474 7.23
2026-06-06 00:00 04:36:35.41 +15:48:08.5 HIP 21474 4.22
2026-06-06 12:00 04:36:53.79 +15:48:34.8 HIP 21474 4.78
2026-06-07 00:00 04:37:12.17 +15:49:00.9 HIP 21474 8.21
2026-06-07 12:00 04:37:30.54 +15:49:26.7 HIP 21474 12.30
2026-06-08 00:00 04:37:48.89 +15:49:52.1 HIP 21588 13.10
2026-06-08 12:00 04:38:07.24 +15:50:17.3 HIP 21588 11.73
2026-06-09 00:00 04:38:25.57 +15:50:42.1 HIP 21673 10.84
2026-06-09 12:00 04:38:43.88 +15:51:06.7 HIP 21673 6.84
2026-06-10 00:00 04:39:02.19 +15:51:30.9 HIP 21673 3.90
2026-06-10 12:00 04:39:20.47 +15:51:54.9 HIP 21683 3.31
2026-06-11 00:00 04:39:38.74 +15:52:18.5 HIP 21683 6.03
2026-06-11 12:00 04:39:57.00 +15:52:41.8 HIP 21683 10.04
2026-06-12 00:00 04:40:15.24 +15:53:04.8 HIP 21683 14.28
2026-06-12 12:00 04:40:33.46 +15:53:27.5 HIP 21683 18.59
2026-06-13 00:00 04:40:51.67 +15:53:49.9 HIP 21873 19.27
2026-06-13 12:00 04:41:09.85 +15:54:12.0 HIP 21873 14.95
2026-06-14 00:00 04:41:28.02 +15:54:33.7 HIP 21873 10.67
2026-06-14 12:00 04:41:46.17 +15:54:55.1 HIP 21873 6.55
2026-06-15 00:00 04:42:04.29 +15:55:16.2 HIP 21873 3.21
2026-06-15 12:00 04:42:22.40 +15:55:37.0 HIP 21873 3.99
2026-06-16 00:00 04:42:40.48 +15:55:57.5 HIP 21873 7.72
2026-06-16 12:00 04:42:58.54 +15:56:17.6 HIP 21873 11.88
2026-06-17 00:00 04:43:16.58 +15:56:37.5 HIP 22004 10.33
2026-06-17 12:00 04:43:34.59 +15:56:57.0 HIP 22004 7.88
2026-06-18 00:00 04:43:52.58 +15:57:16.2 HIP 22004 7.43
2026-06-18 12:00 04:44:10.54 +15:57:35.0 HIP 22004 9.26
2026-06-19 00:00 04:44:28.48 +15:57:53.6 HIP 22004 12.39
2026-06-19 12:00 04:44:46.39 +15:58:11.8 HIP 22004 16.08
2026-06-20 00:00 04:45:04.27 +15:58:29.7 HIP 22004 20.01
2026-06-20 12:00 04:45:22.13 +15:58:47.2 HIP 22004 24.06
2026-06-21 00:00 04:45:39.95 +15:59:04.5 HIP 22225 25.30
2026-06-21 12:00 04:45:57.75 +15:59:21.4 HIP 22225 22.47
2026-06-22 00:00 04:46:15.52 +15:59:38.0 HIP 22225 20.18