메타데이터
| 항목 |
값 |
| Designation |
C/2025 Y1 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2027-10-14T01:39:12.623040Z |
| Orbit solution date (soln_date, UTC) |
2026-05-08T13:42:12Z |
| Obs used |
988 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
9.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2025-12-26T13:40:40.656000Z |
| Discovery magnitude (MPC) |
18.75 o |
| Discovery observatory (MPC) |
T05 · ATLAS-HKO, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2026-03-08.0000000 |
| e |
0.99950351 |
| q (au) |
2.601840 |
| a (au) |
5240.512241 |
| i (deg) |
14.557276 |
| Ω (om, deg) |
166.552393 |
| ω (w, deg) |
124.300712 |
| M (ma, deg) |
359.998480 |
밝기
산란 + 전체 선형
$$
M_a = (5.919 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.919 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.800 |
| k |
0.800 |
| δ90 |
9.999 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
12:44:15.99 |
+04:16:18.6 |
HIP 62240 |
17.59 |
| 2026-05-12 12:00 |
12:44:07.12 |
+04:17:18.8 |
HIP 62240 |
19.47 |
| 2026-05-13 00:00 |
12:43:58.38 |
+04:18:17.9 |
HIP 62240 |
21.42 |
| 2026-05-13 12:00 |
12:43:49.76 |
+04:19:15.9 |
HIP 61991 |
23.38 |
| 2026-05-14 00:00 |
12:43:41.27 |
+04:20:12.6 |
HIP 61991 |
21.36 |
| 2026-05-14 12:00 |
12:43:32.91 |
+04:21:08.2 |
HIP 61991 |
19.45 |
| 2026-05-15 00:00 |
12:43:24.68 |
+04:22:02.6 |
HIP 61991 |
17.64 |
| 2026-05-15 12:00 |
12:43:16.58 |
+04:22:55.8 |
HIP 61991 |
15.97 |
| 2026-05-16 00:00 |
12:43:08.61 |
+04:23:47.8 |
HIP 61991 |
14.47 |
| 2026-05-16 12:00 |
12:43:00.77 |
+04:24:38.6 |
HIP 61991 |
13.17 |
| 2026-05-17 00:00 |
12:42:53.08 |
+04:25:28.2 |
HIP 61991 |
12.12 |
| 2026-05-17 12:00 |
12:42:45.51 |
+04:26:16.6 |
HIP 61991 |
11.37 |
| 2026-05-18 00:00 |
12:42:38.09 |
+04:27:03.8 |
HIP 61991 |
10.96 |
| 2026-05-18 12:00 |
12:42:30.80 |
+04:27:49.7 |
HIP 61991 |
10.90 |
| 2026-05-19 00:00 |
12:42:23.66 |
+04:28:34.5 |
HIP 61991 |
11.17 |
| 2026-05-19 12:00 |
12:42:16.65 |
+04:29:18.0 |
HIP 61991 |
11.74 |
| 2026-05-20 00:00 |
12:42:09.79 |
+04:30:00.3 |
HIP 61991 |
12.55 |
| 2026-05-20 12:00 |
12:42:03.08 |
+04:30:41.3 |
HIP 61991 |
13.54 |
| 2026-05-21 00:00 |
12:41:56.50 |
+04:31:21.1 |
HIP 61991 |
14.65 |
| 2026-05-21 12:00 |
12:41:50.08 |
+04:31:59.7 |
HIP 61991 |
15.84 |
| 2026-05-22 00:00 |
12:41:43.80 |
+04:32:37.1 |
HIP 61991 |
17.10 |
| 2026-05-22 12:00 |
12:41:37.66 |
+04:33:13.2 |
HIP 61991 |
18.38 |
| 2026-05-23 00:00 |
12:41:31.68 |
+04:33:48.1 |
HIP 61991 |
19.68 |
| 2026-05-23 12:00 |
12:41:25.84 |
+04:34:21.7 |
HIP 61991 |
20.98 |
| 2026-05-24 00:00 |
12:41:20.15 |
+04:34:54.1 |
HIP 61991 |
22.28 |
| 2026-05-24 12:00 |
12:41:14.62 |
+04:35:25.3 |
HIP 61991 |
23.56 |
| 2026-05-25 00:00 |
12:41:09.23 |
+04:35:55.2 |
HIP 61991 |
24.82 |
| 2026-05-25 12:00 |
12:41:04.00 |
+04:36:23.9 |
HIP 61991 |
26.06 |
| 2026-05-26 00:00 |
12:40:58.92 |
+04:36:51.4 |
HIP 61991 |
27.27 |
| 2026-05-26 12:00 |
12:40:54.00 |
+04:37:17.6 |
HIP 61991 |
28.46 |
| 2026-05-27 00:00 |
12:40:49.22 |
+04:37:42.6 |
HIP 61991 |
29.61 |
| 2026-05-27 12:00 |
12:40:44.61 |
+04:38:06.3 |
HIP 61991 |
30.72 |
| 2026-05-28 00:00 |
12:40:40.14 |
+04:38:28.8 |
HIP 61991 |
31.80 |
| 2026-05-28 12:00 |
12:40:35.84 |
+04:38:50.1 |
HIP 61745 |
30.85 |
| 2026-05-29 00:00 |
12:40:31.69 |
+04:39:10.1 |
HIP 61745 |
29.93 |
| 2026-05-29 12:00 |
12:40:27.69 |
+04:39:28.9 |
HIP 61745 |
29.07 |
| 2026-05-30 00:00 |
12:40:23.86 |
+04:39:46.5 |
HIP 61745 |
28.26 |
| 2026-05-30 12:00 |
12:40:20.18 |
+04:40:02.8 |
HIP 61745 |
27.50 |
| 2026-05-31 00:00 |
12:40:16.66 |
+04:40:17.9 |
HIP 61745 |
26.79 |
| 2026-05-31 12:00 |
12:40:13.30 |
+04:40:31.8 |
HIP 61745 |
26.14 |
| 2026-06-01 00:00 |
12:40:10.10 |
+04:40:44.4 |
HIP 61745 |
25.53 |
| 2026-06-01 12:00 |
12:40:07.06 |
+04:40:55.8 |
HIP 61745 |
24.98 |
| 2026-06-02 00:00 |
12:40:04.18 |
+04:41:05.9 |
HIP 61745 |
24.47 |