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 · University of Arizona 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) |
| 2026-09-20 00:00 |
22:12:55.82 |
-38:22:46.6 |
HIP 109636 |
6.53 |
| 2026-09-20 12:00 |
22:12:39.68 |
-38:22:00.7 |
HIP 109636 |
4.33 |
| 2026-09-21 00:00 |
22:12:23.64 |
-38:21:13.9 |
HIP 109636 |
3.98 |
| 2026-09-21 12:00 |
22:12:07.70 |
-38:20:26.0 |
HIP 109595 |
2.50 |
| 2026-09-22 00:00 |
22:11:51.85 |
-38:19:37.1 |
HIP 109595 |
2.50 |
| 2026-09-22 12:00 |
22:11:36.11 |
-38:18:47.2 |
HIP 109595 |
5.17 |
| 2026-09-23 00:00 |
22:11:20.47 |
-38:17:56.3 |
HIP 109595 |
8.20 |
| 2026-09-23 12:00 |
22:11:04.93 |
-38:17:04.4 |
HIP 109455 |
9.48 |
| 2026-09-24 00:00 |
22:10:49.49 |
-38:16:11.4 |
HIP 109455 |
6.81 |
| 2026-09-24 12:00 |
22:10:34.16 |
-38:15:17.5 |
HIP 109455 |
4.77 |
| 2026-09-25 00:00 |
22:10:18.94 |
-38:14:22.7 |
HIP 109455 |
4.32 |
| 2026-09-25 12:00 |
22:10:03.82 |
-38:13:26.8 |
HIP 109455 |
5.81 |
| 2026-09-26 00:00 |
22:09:48.81 |
-38:12:29.9 |
HIP 109455 |
8.24 |
| 2026-09-26 12:00 |
22:09:33.91 |
-38:11:32.1 |
HIP 109455 |
10.99 |
| 2026-09-27 00:00 |
22:09:19.12 |
-38:10:33.4 |
HIP 109455 |
13.86 |
| 2026-09-27 12:00 |
22:09:04.44 |
-38:09:33.6 |
HIP 109455 |
16.77 |
| 2026-09-28 00:00 |
22:08:49.88 |
-38:08:33.0 |
HIP 109455 |
19.71 |
| 2026-09-28 12:00 |
22:08:35.42 |
-38:07:31.3 |
HIP 109318 |
20.95 |
| 2026-09-29 00:00 |
22:08:21.08 |
-38:06:28.8 |
HIP 109318 |
20.51 |
| 2026-09-29 12:00 |
22:08:06.86 |
-38:05:25.3 |
HIP 109318 |
20.48 |
| 2026-09-30 00:00 |
22:07:52.75 |
-38:04:20.9 |
HIP 109318 |
20.86 |
| 2026-09-30 12:00 |
22:07:38.76 |
-38:03:15.5 |
HIP 109318 |
21.63 |
| 2026-10-01 00:00 |
22:07:24.88 |
-38:02:09.3 |
HIP 109318 |
22.73 |
| 2026-10-01 12:00 |
22:07:11.13 |
-38:01:02.1 |
HIP 109318 |
24.12 |
| 2026-10-02 00:00 |
22:06:57.49 |
-37:59:54.0 |
HIP 109318 |
25.74 |
| 2026-10-02 12:00 |
22:06:43.97 |
-37:58:45.0 |
HIP 109318 |
27.55 |
| 2026-10-03 00:00 |
22:06:30.58 |
-37:57:35.2 |
HIP 109061 |
29.14 |
| 2026-10-03 12:00 |
22:06:17.31 |
-37:56:24.4 |
HIP 109061 |
29.43 |
| 2026-10-04 00:00 |
22:06:04.16 |
-37:55:12.8 |
HIP 109061 |
30.01 |
| 2026-10-04 12:00 |
22:05:51.13 |
-37:54:00.3 |
HIP 109061 |
30.85 |
| 2026-10-05 00:00 |
22:05:38.23 |
-37:52:46.9 |
HIP 109061 |
31.95 |
| 2026-10-05 12:00 |
22:05:25.46 |
-37:51:32.6 |
HIP 108993 |
30.68 |
| 2026-10-06 00:00 |
22:05:12.81 |
-37:50:17.5 |
HIP 108993 |
28.94 |
| 2026-10-06 12:00 |
22:05:00.29 |
-37:49:01.5 |
HIP 108993 |
27.37 |
| 2026-10-07 00:00 |
22:04:47.89 |
-37:47:44.7 |
HIP 108993 |
25.99 |
| 2026-10-07 12:00 |
22:04:35.63 |
-37:46:27.1 |
HIP 108993 |
24.82 |
| 2026-10-08 00:00 |
22:04:23.49 |
-37:45:08.6 |
HIP 108993 |
23.90 |
| 2026-10-08 12:00 |
22:04:11.49 |
-37:43:49.3 |
HIP 108993 |
23.24 |
| 2026-10-09 00:00 |
22:03:59.61 |
-37:42:29.2 |
HIP 108993 |
22.87 |
| 2026-10-09 12:00 |
22:03:47.87 |
-37:41:08.2 |
HIP 108993 |
22.79 |
| 2026-10-10 00:00 |
22:03:36.26 |
-37:39:46.5 |
HIP 108993 |
23.00 |
| 2026-10-10 12:00 |
22:03:24.78 |
-37:38:23.9 |
HIP 108993 |
23.49 |
| 2026-10-11 00:00 |
22:03:13.44 |
-37:37:00.6 |
HIP 108993 |
24.23 |