메타데이터
| 항목 |
값 |
| Designation |
C/2021 X1 (Maury-Attard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-05-27T07:30:21.781440Z |
| Orbit solution date (soln_date, UTC) |
2024-10-05T23:12:24Z |
| Obs used |
2855 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
8.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2021-12-02T07:46:33.600000Z |
| Discovery magnitude (MPC) |
19.00 G |
| Discovery observatory (MPC) |
W94 · MAPS, San Pedro de Atacama |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-07-16.0000000 |
| e |
1.00132476 |
| q (au) |
3.233578 |
| a (au) |
-2440.886866 |
| i (deg) |
140.111737 |
| Ω (om, deg) |
10.591202 |
| ω (w, deg) |
334.595699 |
| M (ma, deg) |
0.000406 |
밝기
산란 + 전체 선형
$$
M_a = (7.700 + 3.519\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.700 |
| n |
3.519 |
| gf |
0.984 |
| gb |
-0.977 |
| k |
1.000 |
| δ90 |
9.941 |
| 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 |
| 2021-12-02 |
2022-11-02 |
+4.7012 |
-3.916 |
| 2022-11-02 |
2023-03-19 |
-16.6533 |
+8.611 |
| 2023-06-17 |
2024-09-27 |
+1.8796 |
-0.958 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
19:17:08.17 |
+20:51:20.3 |
HIP 94759 |
18.04 |
| 2026-06-01 12:00 |
19:16:53.19 |
+20:52:21.8 |
HIP 94759 |
18.69 |
| 2026-06-02 00:00 |
19:16:38.13 |
+20:53:22.2 |
HIP 94759 |
19.99 |
| 2026-06-02 12:00 |
19:16:23.00 |
+20:54:21.5 |
HIP 94759 |
21.82 |
| 2026-06-03 00:00 |
19:16:07.78 |
+20:55:19.8 |
HIP 94620 |
22.01 |
| 2026-06-03 12:00 |
19:15:52.50 |
+20:56:17.0 |
HIP 94620 |
19.45 |
| 2026-06-04 00:00 |
19:15:37.14 |
+20:57:13.2 |
HIP 94620 |
17.33 |
| 2026-06-04 12:00 |
19:15:21.70 |
+20:58:08.2 |
HIP 94620 |
15.82 |
| 2026-06-05 00:00 |
19:15:06.20 |
+20:59:02.2 |
HIP 94620 |
15.12 |
| 2026-06-05 12:00 |
19:14:50.62 |
+20:59:55.0 |
HIP 94620 |
15.33 |
| 2026-06-06 00:00 |
19:14:34.97 |
+21:00:46.7 |
HIP 94620 |
16.45 |
| 2026-06-06 12:00 |
19:14:19.25 |
+21:01:37.4 |
HIP 94620 |
18.30 |
| 2026-06-07 00:00 |
19:14:03.47 |
+21:02:26.8 |
HIP 94620 |
20.70 |
| 2026-06-07 12:00 |
19:13:47.62 |
+21:03:15.2 |
HIP 94355 |
23.13 |
| 2026-06-08 00:00 |
19:13:31.70 |
+21:04:02.4 |
HIP 94355 |
19.48 |
| 2026-06-08 12:00 |
19:13:15.72 |
+21:04:48.5 |
HIP 94355 |
15.89 |
| 2026-06-09 00:00 |
19:12:59.68 |
+21:05:33.5 |
HIP 94355 |
12.42 |
| 2026-06-09 12:00 |
19:12:43.57 |
+21:06:17.3 |
HIP 94355 |
9.25 |
| 2026-06-10 00:00 |
19:12:27.40 |
+21:06:59.9 |
HIP 94355 |
6.80 |
| 2026-06-10 12:00 |
19:12:11.17 |
+21:07:41.4 |
HIP 94355 |
6.05 |
| 2026-06-11 00:00 |
19:11:54.89 |
+21:08:21.6 |
HIP 94355 |
7.54 |
| 2026-06-11 12:00 |
19:11:38.54 |
+21:09:00.7 |
HIP 94279 |
7.59 |
| 2026-06-12 00:00 |
19:11:22.14 |
+21:09:38.7 |
HIP 94279 |
6.01 |
| 2026-06-12 12:00 |
19:11:05.69 |
+21:10:15.4 |
HIP 94207 |
4.99 |
| 2026-06-13 00:00 |
19:10:49.18 |
+21:10:50.9 |
HIP 94207 |
1.13 |
| 2026-06-13 12:00 |
19:10:32.62 |
+21:11:25.3 |
HIP 94207 |
2.84 |
| 2026-06-14 00:00 |
19:10:16.01 |
+21:11:58.4 |
HIP 94207 |
6.74 |
| 2026-06-14 12:00 |
19:09:59.35 |
+21:12:30.3 |
HIP 94207 |
10.66 |
| 2026-06-15 00:00 |
19:09:42.64 |
+21:13:01.0 |
HIP 94207 |
14.59 |
| 2026-06-15 12:00 |
19:09:25.88 |
+21:13:30.5 |
HIP 94207 |
18.52 |
| 2026-06-16 00:00 |
19:09:09.08 |
+21:13:58.8 |
HIP 94207 |
22.47 |
| 2026-06-16 12:00 |
19:08:52.24 |
+21:14:25.8 |
HIP 94207 |
26.42 |
| 2026-06-17 00:00 |
19:08:35.35 |
+21:14:51.6 |
HIP 93894 |
26.21 |
| 2026-06-17 12:00 |
19:08:18.42 |
+21:15:16.2 |
HIP 93894 |
23.66 |
| 2026-06-18 00:00 |
19:08:01.45 |
+21:15:39.5 |
HIP 93894 |
21.51 |
| 2026-06-18 12:00 |
19:07:44.44 |
+21:16:01.6 |
HIP 93894 |
19.92 |
| 2026-06-19 00:00 |
19:07:27.40 |
+21:16:22.5 |
HIP 93894 |
19.01 |
| 2026-06-19 12:00 |
19:07:10.32 |
+21:16:42.1 |
HIP 93894 |
18.90 |
| 2026-06-20 00:00 |
19:06:53.21 |
+21:17:00.5 |
HIP 93894 |
19.60 |
| 2026-06-20 12:00 |
19:06:36.06 |
+21:17:17.6 |
HIP 93894 |
21.04 |
| 2026-06-21 00:00 |
19:06:18.89 |
+21:17:33.5 |
HIP 93721 |
18.86 |
| 2026-06-21 12:00 |
19:06:01.68 |
+21:17:48.1 |
HIP 93721 |
14.97 |
| 2026-06-22 00:00 |
19:05:44.45 |
+21:18:01.5 |
HIP 93721 |
11.17 |