| Minorplanet: | yes |
| 1181 Lilith | |
| Background: |
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| Symbol: | 24px (astrological) |
| Discovered: | 11 February 1927 |
| Mpc Name: | (1181) Lilith |
| Alt Names: | 1927 CQ1925 QF 1943 WC1953 CA 1964 PGA914 BA |
| Named After: | Lili Boulanger |
| Epoch: | 31 May 2020 (JD 2459000.5) |
| Uncertainty: | 0 |
| Observation Arc: | 89.50 yr (32,689 d) |
| Perihelion: | 2.1457 AU |
| Semimajor: | 2.6654 AU |
| Eccentricity: | 0.1950 |
| Period: | 4.35 yr (1,589 d) |
| Mean Motion: | / day |
| Inclination: | 5.6012° |
| Asc Node: | 260.70° |
| Arg Peri: | 156.05° |
| Abs Magnitude: | 11.3 |
1181 Lilith (prov. designation:) is a metallic asteroid from the middle region of the asteroid belt, approximately 23km (14miles) in diameter. It was discovered on 11 February 1927, by Russian–French astronomer Benjamin Jekhowsky at Algiers Observatory in Algeria, Northern Africa, and named after French composer Lili Boulanger.
Lilith is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the middle asteroid belt at a distance of 2.1–3.2 AU once every 4 years and 4 months (1,587 days). Its orbit has an eccentricity of 0.20 and an inclination of 6° with respect to the ecliptic. First observed as at Simeiz Observatory in 1914, Liliths observation arc begins 7 years after its official discovery observation, with its first used observation made at Konkoly Observatory in 1934.
This minor planet was named by the discoverer for French composer Marie-Juliette Olga Lili Boulanger (1893–1918), younger sister of the noted conductor and composer, Nadia Boulanger. Her byname "Lili" originates from Lilith, Adam's first wife in Jewish mythology .
Lilith is an X-type asteroid in the Bus–Binzel SMASS taxonomy. It has also been classified as a P-type asteroid by NASA's space-based Wide-field Infrared Survey Explorer (WISE).
In February 2014, a rotational lightcurve of Lilith was obtained by Italian astronomer Andrea Ferrero at the Bigmuskie Observatory in Mombercelli, Italy. The photometric observations rendered a period of hours with a brightness amplitude of 0.11 in magnitude .
According to NASA's WISE telescope with its subsequent NEOWISE mission, Lilith measures kilometers in diameter and its surface has an albedo of, while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10, and calculates a diameter of 24.2 kilometers with an absolute magnitude of 11.2. The WISE team also published an alternative mean diameter and an albedo of .