메타데이터
| 항목 |
값 |
| Designation |
C/2022 A3 (Lemmon-ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-09-28T20:10:26.535360Z |
| Orbit solution date (soln_date, UTC) |
2024-10-31T13:12:14Z |
| Obs used |
1015 |
| NEO |
- |
| M1 |
8.600 |
| K1 |
9.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2022-01-10T10:14:36.297600Z |
| Discovery magnitude (MPC) |
20.34 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-02-25.0000000 |
| e |
0.99596960 |
| q (au) |
3.703462 |
| a (au) |
918.881737 |
| i (deg) |
88.348087 |
| Ω (om, deg) |
325.483203 |
| ω (w, deg) |
234.846313 |
| M (ma, deg) |
359.992363 |
밝기
산란 + 전체 선형
$$
M_a = (9.660 + 4.723\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.660 |
| n |
4.723 |
| gf |
1.000 |
| gb |
-0.731 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2021-04-30 |
2023-06-11 |
+0.7727 |
-0.638 |
| 2023-10-09 |
2024-10-29 |
-5.2480 |
+3.736 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
22:50:52.57 |
-36:41:52.4 |
HIP 112851 |
25.06 |
| 2026-03-26 12:00 |
22:51:04.07 |
-36:40:35.3 |
HIP 112773 |
24.66 |
| 2026-03-27 00:00 |
22:51:15.52 |
-36:39:19.2 |
HIP 112773 |
24.47 |
| 2026-03-27 12:00 |
22:51:26.91 |
-36:38:04.0 |
HIP 112773 |
24.56 |
| 2026-03-28 00:00 |
22:51:38.24 |
-36:36:49.6 |
HIP 112773 |
24.94 |
| 2026-03-28 12:00 |
22:51:49.50 |
-36:35:36.3 |
HIP 112773 |
25.57 |
| 2026-03-29 00:00 |
22:52:00.71 |
-36:34:23.8 |
HIP 112773 |
26.45 |
| 2026-03-29 12:00 |
22:52:11.86 |
-36:33:12.2 |
HIP 112773 |
27.53 |
| 2026-03-30 00:00 |
22:52:22.94 |
-36:32:01.6 |
HIP 112773 |
28.80 |
| 2026-03-30 12:00 |
22:52:33.97 |
-36:30:51.9 |
HIP 112773 |
30.22 |
| 2026-03-31 00:00 |
22:52:44.93 |
-36:29:43.1 |
HIP 113189 |
30.83 |
| 2026-03-31 12:00 |
22:52:55.82 |
-36:28:35.2 |
HIP 113189 |
28.46 |
| 2026-04-01 00:00 |
22:53:06.65 |
-36:27:28.2 |
HIP 113189 |
26.13 |
| 2026-04-01 12:00 |
22:53:17.42 |
-36:26:22.2 |
HIP 113189 |
23.83 |
| 2026-04-02 00:00 |
22:53:28.12 |
-36:25:17.1 |
HIP 113189 |
21.57 |
| 2026-04-02 12:00 |
22:53:38.76 |
-36:24:12.9 |
HIP 113189 |
19.36 |
| 2026-04-03 00:00 |
22:53:49.33 |
-36:23:09.6 |
HIP 113189 |
17.22 |
| 2026-04-03 12:00 |
22:53:59.83 |
-36:22:07.3 |
HIP 113189 |
15.15 |
| 2026-04-04 00:00 |
22:54:10.26 |
-36:21:05.9 |
HIP 113189 |
13.19 |
| 2026-04-04 12:00 |
22:54:20.63 |
-36:20:05.4 |
HIP 113189 |
11.39 |
| 2026-04-05 00:00 |
22:54:30.92 |
-36:19:05.8 |
HIP 113189 |
9.80 |
| 2026-04-05 12:00 |
22:54:41.15 |
-36:18:07.2 |
HIP 113189 |
8.55 |
| 2026-04-06 00:00 |
22:54:51.31 |
-36:17:09.5 |
HIP 113189 |
7.77 |
| 2026-04-06 12:00 |
22:55:01.39 |
-36:16:12.8 |
HIP 113189 |
7.60 |
| 2026-04-07 00:00 |
22:55:11.41 |
-36:15:16.9 |
HIP 113189 |
8.06 |
| 2026-04-07 12:00 |
22:55:21.35 |
-36:14:22.0 |
HIP 113189 |
9.04 |
| 2026-04-08 00:00 |
22:55:31.22 |
-36:13:28.1 |
HIP 113189 |
10.38 |
| 2026-04-08 12:00 |
22:55:41.01 |
-36:12:35.1 |
HIP 113189 |
11.95 |
| 2026-04-09 00:00 |
22:55:50.73 |
-36:11:43.0 |
HIP 113189 |
13.66 |
| 2026-04-09 12:00 |
22:56:00.37 |
-36:10:51.8 |
HIP 113189 |
15.46 |
| 2026-04-10 00:00 |
22:56:09.94 |
-36:10:01.6 |
HIP 113189 |
17.31 |
| 2026-04-10 12:00 |
22:56:19.43 |
-36:09:12.4 |
HIP 113189 |
19.19 |
| 2026-04-11 00:00 |
22:56:28.85 |
-36:08:24.1 |
HIP 113189 |
21.09 |
| 2026-04-11 12:00 |
22:56:38.19 |
-36:07:36.7 |
HIP 113189 |
22.99 |
| 2026-04-12 00:00 |
22:56:47.45 |
-36:06:50.3 |
HIP 113189 |
24.90 |
| 2026-04-12 12:00 |
22:56:56.63 |
-36:06:04.8 |
HIP 113189 |
26.79 |
| 2026-04-13 00:00 |
22:57:05.72 |
-36:05:20.3 |
HIP 113189 |
28.68 |
| 2026-04-13 12:00 |
22:57:14.74 |
-36:04:36.7 |
HIP 113189 |
30.56 |
| 2026-04-14 00:00 |
22:57:23.68 |
-36:03:54.0 |
HIP 113189 |
32.43 |
| 2026-04-14 12:00 |
22:57:32.53 |
-36:03:12.3 |
HIP 113447 |
34.26 |
| 2026-04-15 00:00 |
22:57:41.31 |
-36:02:31.6 |
HIP 113447 |
33.00 |
| 2026-04-15 12:00 |
22:57:49.99 |
-36:01:51.8 |
HIP 113447 |
31.82 |
| 2026-04-16 00:00 |
22:57:58.60 |
-36:01:13.0 |
HIP 113447 |
30.74 |