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 |
0.998 |
| gb |
-0.500 |
| 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) |
| 2026-09-20 00:00 |
20:35:49.79 |
-02:26:02.0 |
HIP 101692 |
15.14 |
| 2026-09-20 12:00 |
20:35:27.41 |
-02:27:12.8 |
HIP 101541 |
18.18 |
| 2026-09-21 00:00 |
20:35:05.29 |
-02:28:23.3 |
HIP 101541 |
14.40 |
| 2026-09-21 12:00 |
20:34:43.44 |
-02:29:33.4 |
HIP 101541 |
12.17 |
| 2026-09-22 00:00 |
20:34:21.84 |
-02:30:43.0 |
HIP 101541 |
12.28 |
| 2026-09-22 12:00 |
20:34:00.49 |
-02:31:52.3 |
HIP 101541 |
14.60 |
| 2026-09-23 00:00 |
20:33:39.41 |
-02:33:01.2 |
HIP 101541 |
18.24 |
| 2026-09-23 12:00 |
20:33:18.59 |
-02:34:09.7 |
HIP 101541 |
22.54 |
| 2026-09-24 00:00 |
20:32:58.02 |
-02:35:17.7 |
HIP 101541 |
27.14 |
| 2026-09-24 12:00 |
20:32:37.71 |
-02:36:25.4 |
HIP 101224 |
22.82 |
| 2026-09-25 00:00 |
20:32:17.66 |
-02:37:32.5 |
HIP 101224 |
17.91 |
| 2026-09-25 12:00 |
20:31:57.87 |
-02:38:39.3 |
HIP 101224 |
13.22 |
| 2026-09-26 00:00 |
20:31:38.34 |
-02:39:45.5 |
HIP 101224 |
9.01 |
| 2026-09-26 12:00 |
20:31:19.06 |
-02:40:51.4 |
HIP 101224 |
6.15 |
| 2026-09-27 00:00 |
20:31:00.04 |
-02:41:56.7 |
HIP 101224 |
6.56 |
| 2026-09-27 12:00 |
20:30:41.28 |
-02:43:01.6 |
HIP 101224 |
9.73 |
| 2026-09-28 00:00 |
20:30:22.77 |
-02:44:06.0 |
HIP 101224 |
13.83 |
| 2026-09-28 12:00 |
20:30:04.52 |
-02:45:09.9 |
HIP 101101 |
10.21 |
| 2026-09-29 00:00 |
20:29:46.53 |
-02:46:13.3 |
HIP 101101 |
7.16 |
| 2026-09-29 12:00 |
20:29:28.79 |
-02:47:16.2 |
HIP 101101 |
6.39 |
| 2026-09-30 00:00 |
20:29:11.30 |
-02:48:18.6 |
HIP 101101 |
8.42 |
| 2026-09-30 12:00 |
20:28:54.07 |
-02:49:20.5 |
HIP 101101 |
11.83 |
| 2026-10-01 00:00 |
20:28:37.09 |
-02:50:21.8 |
HIP 101101 |
15.69 |
| 2026-10-01 12:00 |
20:28:20.37 |
-02:51:22.7 |
HIP 101101 |
19.70 |
| 2026-10-02 00:00 |
20:28:03.90 |
-02:52:23.0 |
HIP 101101 |
23.75 |
| 2026-10-02 12:00 |
20:27:47.68 |
-02:53:22.8 |
HIP 101101 |
27.78 |
| 2026-10-03 00:00 |
20:27:31.72 |
-02:54:22.0 |
HIP 100758 |
27.99 |
| 2026-10-03 12:00 |
20:27:16.00 |
-02:55:20.6 |
HIP 100758 |
24.46 |
| 2026-10-04 00:00 |
20:27:00.54 |
-02:56:18.7 |
HIP 100758 |
21.17 |
| 2026-10-04 12:00 |
20:26:45.33 |
-02:57:16.3 |
HIP 100758 |
18.21 |
| 2026-10-05 00:00 |
20:26:30.37 |
-02:58:13.2 |
HIP 100758 |
15.71 |
| 2026-10-05 12:00 |
20:26:15.66 |
-02:59:09.6 |
HIP 100758 |
13.88 |
| 2026-10-06 00:00 |
20:26:01.19 |
-03:00:05.4 |
HIP 100758 |
12.94 |
| 2026-10-06 12:00 |
20:25:46.98 |
-03:01:00.7 |
HIP 100758 |
13.04 |
| 2026-10-07 00:00 |
20:25:33.01 |
-03:01:55.3 |
HIP 100758 |
14.11 |
| 2026-10-07 12:00 |
20:25:19.29 |
-03:02:49.3 |
HIP 100758 |
15.90 |
| 2026-10-08 00:00 |
20:25:05.82 |
-03:03:42.7 |
HIP 100758 |
18.18 |
| 2026-10-08 12:00 |
20:24:52.59 |
-03:04:35.5 |
HIP 100758 |
20.74 |
| 2026-10-09 00:00 |
20:24:39.60 |
-03:05:27.7 |
HIP 100720 |
21.53 |
| 2026-10-09 12:00 |
20:24:26.86 |
-03:06:19.2 |
HIP 100720 |
22.14 |
| 2026-10-10 00:00 |
20:24:14.37 |
-03:07:10.1 |
HIP 100720 |
23.16 |
| 2026-10-10 12:00 |
20:24:02.11 |
-03:08:00.4 |
HIP 100720 |
24.54 |
| 2026-10-11 00:00 |
20:23:50.10 |
-03:08:50.0 |
HIP 100720 |
26.20 |