메타데이터
| 항목 |
값 |
| Designation |
C/2025 O2 (MAPS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-05-23T16:42:19.152000Z |
| Orbit solution date (soln_date, UTC) |
2025-09-22T13:42:18Z |
| Obs used |
88 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
27.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-07-25T09:35:29.760000Z |
| Discovery magnitude (MPC) |
18.80 G |
| Discovery observatory (MPC) |
W94 · MAPS, San Pedro de Atacama |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-08-14.0000000 |
| e |
0.99886564 |
| q (au) |
2.288532 |
| a (au) |
2017.460252 |
| i (deg) |
134.542008 |
| Ω (om, deg) |
332.313059 |
| ω (w, deg) |
280.240987 |
| M (ma, deg) |
0.000895 |
밝기
산란 + 전체 선형
$$
M_a = (11.254 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.254 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.504 |
| k |
1.000 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
22:35:45.59 |
-07:43:35.2 |
HIP 111577 |
8.63 |
| 2026-03-26 12:00 |
22:35:52.75 |
-07:40:17.8 |
HIP 111577 |
6.03 |
| 2026-03-27 00:00 |
22:35:59.81 |
-07:37:00.9 |
HIP 111577 |
5.13 |
| 2026-03-27 12:00 |
22:36:06.78 |
-07:33:44.4 |
HIP 111577 |
6.63 |
| 2026-03-28 00:00 |
22:36:13.65 |
-07:30:28.4 |
HIP 111577 |
9.43 |
| 2026-03-28 12:00 |
22:36:20.42 |
-07:27:12.9 |
HIP 111545 |
9.81 |
| 2026-03-29 00:00 |
22:36:27.10 |
-07:23:57.9 |
HIP 111545 |
9.40 |
| 2026-03-29 12:00 |
22:36:33.67 |
-07:20:43.3 |
HIP 111545 |
10.32 |
| 2026-03-30 00:00 |
22:36:40.15 |
-07:17:29.1 |
HIP 111545 |
12.27 |
| 2026-03-30 12:00 |
22:36:46.53 |
-07:14:15.5 |
HIP 111557 |
14.66 |
| 2026-03-31 00:00 |
22:36:52.80 |
-07:11:02.3 |
HIP 111557 |
14.13 |
| 2026-03-31 12:00 |
22:36:58.98 |
-07:07:49.6 |
HIP 111557 |
14.46 |
| 2026-04-01 00:00 |
22:37:05.04 |
-07:04:37.3 |
HIP 111557 |
15.59 |
| 2026-04-01 12:00 |
22:37:11.01 |
-07:01:25.6 |
HIP 111557 |
17.36 |
| 2026-04-02 00:00 |
22:37:16.86 |
-06:58:14.3 |
HIP 111557 |
19.58 |
| 2026-04-02 12:00 |
22:37:22.61 |
-06:55:03.4 |
HIP 111557 |
22.10 |
| 2026-04-03 00:00 |
22:37:28.25 |
-06:51:53.1 |
HIP 111557 |
24.83 |
| 2026-04-03 12:00 |
22:37:33.78 |
-06:48:43.2 |
HIP 111531 |
27.07 |
| 2026-04-04 00:00 |
22:37:39.21 |
-06:45:33.8 |
HIP 111531 |
28.18 |
| 2026-04-04 12:00 |
22:37:44.52 |
-06:42:24.9 |
HIP 111531 |
29.62 |
| 2026-04-05 00:00 |
22:37:49.71 |
-06:39:16.5 |
HIP 111531 |
31.34 |
| 2026-04-05 12:00 |
22:37:54.80 |
-06:36:08.5 |
HIP 111531 |
33.29 |
| 2026-04-06 00:00 |
22:37:59.76 |
-06:33:01.1 |
HIP 111668 |
30.79 |
| 2026-04-06 12:00 |
22:38:04.62 |
-06:29:54.1 |
HIP 111668 |
28.34 |
| 2026-04-07 00:00 |
22:38:09.35 |
-06:26:47.6 |
HIP 111668 |
26.10 |
| 2026-04-07 12:00 |
22:38:13.97 |
-06:23:41.6 |
HIP 111668 |
24.09 |
| 2026-04-08 00:00 |
22:38:18.47 |
-06:20:36.1 |
HIP 111668 |
22.38 |
| 2026-04-08 12:00 |
22:38:22.84 |
-06:17:31.1 |
HIP 111668 |
21.03 |
| 2026-04-09 00:00 |
22:38:27.10 |
-06:14:26.6 |
HIP 111668 |
20.10 |
| 2026-04-09 12:00 |
22:38:31.23 |
-06:11:22.6 |
HIP 111792 |
18.54 |
| 2026-04-10 00:00 |
22:38:35.23 |
-06:08:19.1 |
HIP 111792 |
15.45 |
| 2026-04-10 12:00 |
22:38:39.11 |
-06:05:16.1 |
HIP 111792 |
12.43 |
| 2026-04-11 00:00 |
22:38:42.87 |
-06:02:13.6 |
HIP 111792 |
9.52 |
| 2026-04-11 12:00 |
22:38:46.49 |
-05:59:11.7 |
HIP 111792 |
6.86 |
| 2026-04-12 00:00 |
22:38:49.99 |
-05:56:10.2 |
HIP 111792 |
4.84 |
| 2026-04-12 12:00 |
22:38:53.35 |
-05:53:09.3 |
HIP 111792 |
4.38 |
| 2026-04-13 00:00 |
22:38:56.59 |
-05:50:08.9 |
HIP 111792 |
5.85 |
| 2026-04-13 12:00 |
22:38:59.69 |
-05:47:09.0 |
HIP 111792 |
8.25 |
| 2026-04-14 00:00 |
22:39:02.65 |
-05:44:09.7 |
HIP 111792 |
10.98 |
| 2026-04-14 12:00 |
22:39:05.48 |
-05:41:10.9 |
HIP 111792 |
13.83 |
| 2026-04-15 00:00 |
22:39:08.17 |
-05:38:12.6 |
HIP 111792 |
16.73 |
| 2026-04-15 12:00 |
22:39:10.73 |
-05:35:14.9 |
HIP 111792 |
19.65 |
| 2026-04-16 00:00 |
22:39:13.14 |
-05:32:17.7 |
HIP 111792 |
22.58 |